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• HP G61 Laptop wont boot- display stays off, caps and num lock indicators blink repeatedly

  - by Benguy12

  I had my HP G61 laptop running in sleep for a while. When I came back to it about a half-hour later, it was no longer in sleep mode - the power light and the Wi-Fi indicator light were on (I keep Wi-Fi off becuase I use a wired connection) - but nothing was showing on screen. In fact, the display wasn't even turned on. So I let it sit for about 10 minutes but nothing happened. I did a force shut down and rebooted. Instead of a normal boot, the display didnt turn on, the Wi-Fi indicator was off, and the Caps Lock and Num Lock lights just blinked repeatedly. On the external keyboard i use, none of the light indicators were blinking or even on. I tried force shut-down again 10 times, then unplugged all connections except for the power cable (my laptop battery dosent hold a charge for more than 2 minutes, so I always must have a wall connection) and tried to boot again but still nothing happened. I unplugged the battery and even then nothing happened. I also tried booting with the disk drive open, and then with it closed again. On the time it was closed, I was able to successfully boot into Windows, but recieved a "Windows did not shut-down sucessfully" notice. Does anybody know why this may have happened? My PC's specs: Windows 7 Home Premium, 64-bit 4GB of physical RAM, 8GB of vRAM (on a flash drive) AMD Vision x64 processor (don't know any other specs about it) ATI Radeon graphics card, 392 MB DVD-R/W lightscribe drive 2 External hard-disks (first one is 1.5TB, second one is 1TB) custom boot-screen and boot-annimation Standard BIOS apps running before sleep: firefox 10.4 itunes 10.6 adobe photoshop extended CS5.1 rockstar games social club (running in background) microsoft powerpoint 2010 professional edition google chrome I was NOT running Aero or any fancy themes - I was using the normal windows classic theme. I have a desktop icon manager application called Stardock Fences that was also running (it runs as a service/process).

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• What options to use for Accurate bacula backup?

  - by Kiss Stefan

  It's actually 2 question in one. First is a bit more theoretically. So when specifying accurate options how does bacula figure out if a file needs to be backed up ? it's a simple AND ? As in if the options are Accurate = sm5 bacula will not backup the file if ((size = old size) AND (modtime = old modtime) AND (md5 = old md5)) Is that correct ? Do any of the options take precedence ? as in would be a file skipped if modif time is diffreent but it has the same md5sum ? Are there any implied options that you cannot ignore ? Practical case, ( bacula 5.0.1 ) I have to back-up a svn repo, in order to be able to make incremental backups as simple as posible i am hotcopying (client run before) it to another location, that bacula will backup ( then delete it with client run after). Now in the fileset i have Accurate = spnd5 This should tell bacula to take into consideration size , permission bits number of links , decreases in size and md5sum. However , an incremental is also including a full copy of the svn. What am i doing wrong ? it seems that it takes into account creation time even tho i have not specified it.

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• administrator user unable to login, suspicious user accounts "sky$", "admin$"

  - by mks

  I have a Windows 2008 R2 Standard (64 bit) running in a virtual machine. Suddenly from yesterday onwards I am not able to login as administrator. Nobody changed the password. Both in the console as well as using remote desktop I am unable to login. Whenever I login as Administrator I am getting this error: "The user name or password is incorrect" Nothing has changed in the machine and I have logged in the past successfully both through console and via remote desktop several time on the same machine. One strange behaviour I noticed is, I am seeing some additional user accounts if I try to login as other user. The suspicious user account are: sky$ admin$ SUPPORT_388945a0 Is it created by some malware/virus? Or is it some windows hidden account? Microsoft site says that SUPPORT_388945a0 is: The Support_388945a0 account enables Help and Support Service interoperability with signed scripts. This account is primarily used to control access to signed scripts that are accessible from within Help and Support Services. Administrators can use this account to delegate the ability for an ordinary user, who does not have administrative access over a computer, to run signed scripts from links embedded within Help and Support Services. These scripts can be programmed to use the Support_388945a0 account credentials instead of the user’s credentials to perform specific administrative operations on the local computer that otherwise would not be supported by the ordinary user’s account. When the delegated user clicks on a link in Help and Support Services, the script executes under the security context of the Support_388945a0 account. This account has limited access to the computer and is disabled by default. However I am not sure from where this "admin$" and "sky$" came. Anyone has similar experience?

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• What does Apache's "Require all granted" really do?

  - by John Crawford

  I've just update my Apache server to Apache/2.4.6 which is running under Ubuntu 13.04. I used to have a vhost file that had the following: <Directory "/home/john/development/foobar/web"> AllowOverride All </Directory> But when I ran that I got a "Forbidden. You don't have permission to access /" After doing a little bit of googling I found out that to get my site working again I needed to add the following line "Require all granted" so that my vhost looked like this: <Directory "/home/john/development/foobar/web"> AllowOverride All Require all granted </Directory> I want to know if this is "safe" and does not bring in any security issues. I read on Apache's page that this "mimics the functionality the was previously provided by the 'Allow from all' and 'Deny from all' directives. This provider can take one of two arguments which are 'granted' or 'denied'. The following examples will grant or deny access to all requests." But it didn't say if this was a security issue of some sort or why we now have to do it when in the past you did not have to.

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• Openldap startup problems after upgrade

  - by Craig Efrein

  I am trying to syncrhonize a ldap slave and master server. The master server is using openldap 2.3.43-12 and the slave server is using openldap 2.4.23. I copied over the files in /var/lib/ldap, started the server and got this error: Oct 22 16:16:41 xe-ldap-slave1 slapd[12111]: bdb(dc=myserver,dc=fr): Program version 4.7 doesn't match environment version 4.4 Oct 22 16:16:41 xe-ldap-slave1 slapd[12111]: bdb_db_open: database "dc=myserver,dc=fr" cannot be opened, err -30971. Restore from backup! Oct 22 16:16:41 xe-ldap-slave1 slapd[12111]: bdb(dc=myserver,dc=fr): txn_checkpoint interface requires an environment configured for the transaction subsystem Oct 22 16:16:41 xe-ldap-slave1 slapd[12111]: bdb_db_close: database "dc=myserver,dc=fr": txn_checkpoint failed: Invalid argument (22). Oct 22 16:16:41 xe-ldap-slave1 slapd[12111]: backend_startup_one (type=bdb, suffix="dc=myserver,dc=fr"): bi_db_open failed! (-30971) Oct 22 16:16:41 xe-ldap-slave1 slapd[12111]: bdb_db_close: database "dc=myserver,dc=fr": alock_close failed I have used the db_upgrade command to upgrade the database files on the new slave server, but I still get the same error when starting slapd. The master server is Centos 5.5 32bit & openldap 2.3.43-12 The slave server is Centos 6.3 64 bit & openldap 2.4.23 Everything was installed using yum. What is the proper method to synchronize database files from an ldap master server and slave server when the slave server is more recent then the master? I have followed the suggestion from 84104, but I am getting an error on the slave Here is the error on the slave: Oct 23 18:28:30 xe-ldap-slave1 slapd[1415]: slap_client_connect: URI=ldaps://ldap0.lan.myserver.com:636 DN="cn=syncuser,dc=myserver,dc=fr" ldap_sasl_bind_s failed (-1) Oct 23 18:28:30 xe-ldap-slave1 slapd[1415]: do_syncrepl: rid=003 rc -1 retrying Here is the error on the master: Oct 23 18:29:30 ldap0 slapd[15265]: conn=201 fd=35 ACCEPT from IP=192.168.150.100:47690 (IP=0.0.0.0:636) Oct 23 18:29:30 ldap0 slapd[15265]: conn=201 fd=35 closed (TLS negotiation failure) I can do an ldap search on the master just fine with the user configured for synchronization from the new slave server. ldapsearch -LLL -x -H ldaps://192.168.150.99:636 -x -W -b dc=myserver,dc=fr-D"cn=syncuser,dc=myserver,dc=fr"

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• Automate creation of Windows startup script?

  - by Niten

  Is there a good way to automate installing local startup (rather than login) scripts in Windows XP and Windows 7, via the command line, WMI, or otherwise (even COM or Win32 if it comes to that)? I need to setup a local startup script on a large number of computers, and unfortunately, Active Directory is absolutely not an option. I would like to write a script or small program that I can run on each computer to perform the startup script installation in order to save myself a lot of error-prone point-and-click manual labor. I see that when one uses gpedit.msc to create a local startup script, information about the script gets stored in the registry here: HKLM\Software\Policies\Microsoft\Windows\System\Scripts\Startup However, if you create such a script and then delete its registry key, the script will remain listed in the local Group Policy editor; as is so often the case in Windows, apparently there is more going on there than meets the eye. This leads me to question whether it's safe to manually add subkeys for new startup scripts here (I wouldn't want my script to be overwritten by later changes made using the local Group Policy editor, for instance)... Another option that's occurred to me is to create an item in the Task Scheduler configured to run at system startup. However, my concerns there are twofold: Can this be automated any more easily? For instance, the at command doesn't appear to let you schedule a task for system startup, and WMI's Win32_ScheduledJob interface looks unreliable (it fails to show any of my currently scheduled tasks, for one thing). Would I be able to prevent users from logging in until the scheduled startup task is completed, as can be done with "normal" Windows startup scripts? Thanks in advance for any suggestions, I've been banging my head against this one for a bit...

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• Cluster FIle System

  - by Ben

  We are looking for to choose a clustered file system for our in house appplication. Let me first highlight my requirement. we have a storage and 2 servers at present.We get the data files from remote servers to our server and on both servers we are running our application to access those data and make a final result as per our requirements. In future may be after 3-4 months, we can add another servers in current cluster pool to handle more data load from remote location data senders. So my requirement is that to integrate same storage partition on 2-3 servers , it might be 4-5 more servers in future, My application read data from storage partition and write back to storage partition. Is there any bottleneck / limitation from RHCS , GFS2 or anything.? We are new with RHCS + GFS and all. Can we have any other better approach or someway to deal with our requirement light way? what is the best OS version for this ? how's RHEL 6.4 64 bit ? please share some case study or some gudie reference as per past experiences with such environnmnets Regards, Ben

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• Web-based SVG or JavaScript Org Chart or Tree Graph Plotting Visualization API

  - by asoltys

  Hi, I'm looking to build an interactive web-based org chart for a large organization. I somewhat like the interface at ancestry.com where you can hover over people and pan/zoom around and click on different nodes to make them the root. Ideally, I'd like it if people could belong to multiple organizational entities like committees, working groups, etc. In other words the API should support graphs in general, not just trees. I'd like to be able to visually explode each organizational substructure into substituents by clicking on it, with a nice animation of the employees ballooning or spilling out so you can really interactively drill down through the organization. I found http://code.google.com/apis/visualization/documentation/gallery/orgchart.html but it looks a bit rudimentary. I know there are desktop tools like OrgPlus and Visio that can build static charts but I'm really looking for a free, web-based API with open standards-based output like SVG or HTML5 Canvas elements rather than Flash or some proprietary output. Something I can embed into a custom web application and style myself. Something interactive.

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• virtual memory commited

  - by vinu

  After a server bounce happens, and after around 40-45 days time period, we receive continuous “Committed Virtual Memory” alerts which indicates the usage of swap space in the magnitude of 4GB This also causes the application to perform very slowly and experience a number of stalled transactions. Server Setup: 4 Tomcat Servers (version 7.0.22) that are load balanced (not clustered) by 2 Apache Servers. And the Apache servers themselves supply static content and routing to these 4 tomcat servers. Java Runtime Version: java version "1.6.0_30" Java(TM) SE Runtime Environment (build 1.6.0_30-b12) Java HotSpot(TM) 64-Bit Server VM (build 20.5-b03, mixed mode Memory Startup Parameters: MEMORY_OPTIONS="-Xms1024m -Xmx1024m -Xss192k -XX:MaxGCPauseMillis=500 -XX:+HeapDumpOnOutOfMemoryError -XX:MaxPermSize=256m -XX:+CMSClassUnloadingEnabled" Monitoring – Wily monitoring is available in all the production servers that monitors key server parameters and sends out configurable alert emails based on pre defined settings. Note: Each of the servers also has two other separate tomcat domains that run different applications Investigated area: There is no Heap Memory Leak and the GC is running fine without any issues over any period of time The current busy thread count corresponds directly to the application usage – weekends and nights have lesser no. of threads compared to business hours ThreadLocal uses a WeakReference internally. If the ThreadLocal is not strongly referenced, it will be garbage-collected, even though various threads have values stored via that ThreadLocal. Additionally, ThreadLocal values are actually stored in the Thread; if a thread dies, all of the values associated with that thread through a ThreadLocal are collected. If you have a ThreadLocal as a final class member, that's a strong reference, and it cannot be collected until the class is unloaded. But this is how any class member works, and isn't considered a memory leak. The cited problem only comes into play when the value stored in a ThreadLocal strongly references that ThreadLocal—sort of a circular reference. In this case, the value (a SimpleDateFormat), has no backwards reference to the ThreadLocal. There's no memory leak in this code. Can anyone please let me know what could be the cause of this and what to be monitored?

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• Java VM problem in OpenVZ

  - by Ginnun

  Hi, I bought a vps for hosting my java needs. But I can't run java on it. Everything about java is correctly installed but when I try to run java ("java -version" forexample) I get this error : Error occurred during initialization of VM Could not reserve enough space for object heap Could not create the Java virtual machine. I don't think this is a java centered problem, Out of memory for sure. I contacted the vps admin, but he says everything is fine, you have 2gb ram, expandable to 4gb! I did a bit search on the subject, here is my BEANS file (numbers converted to humanredable form using a script). By the way do JVM heap memory allocs count on kmemsize or privvmpages ? How much ram does that configuration allows me to allocate with jvm for a single process? resource held maxheld barrier limit failcnt kmemsize 2.25 mb 2.35 mb 13.71 mb 14.10 mb 0 lockedpages 0 0 1024.00 kb 1024.00 kb 0 privvmpages 20.54 mb 21.33 mb 256.00 mb 272.00 mb 156 shmpages 5.00 mb 5.00 mb 84.00 mb 84.00 mb 0 numproc 13 14 240 240 0 physpages 9.36 mb 9.45 mb 0 MAX_ULONG 0 vmguarpages 0 0 132.00 mb MAX_ULONG 0 oomguarpages 9.36 mb 9.45 mb MAX_ULONG MAX_ULONG 0 numtcpsock 3 3 360 360 0 numflock 3 3 188 206 0 numpty 2 2 16 16 0 numsiginfo 0 1 256 256 0 tcpsndbuf 69.17 kb 69.17 kb 1.64 mb 2.58 mb 0 tcprcvbuf 48.00 kb 48.00 kb 1.64 mb 2.58 mb 0 othersockbuf 6.80 kb 6.80 kb 1.07 mb 2.00 mb 0 dgramrcvbuf 0.00 kb 0.00 kb 256.00 kb 256.00 kb 0 numothersock 9 10 360 360 0 dcachesize 0.00 kb 0.00 kb 3.25 mb 3.46 mb 0 numfile 704 746 9312 9312 0 numiptent 10 10 128 128 0 Thanks in advance!

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• Computer hangs at boot screen with new RAID card

  - by shanethehat

  I am trying to build a new server around a Biostar TH61 motherboard and an Adaptec 6405E RAID controller card. The machine booted fine from USB before the RAID card and drives were installed. After installing, on the first boot the card was detected, but then started to spit out the following message every 10 seconds: Error: Controller Kernel Stopped Running << Press any key to continue ... Following the troubleshooting guide I unplugged everything, reseated the card, and reattached all the drives. This time the machine is sitting on the boot screen without any error messages and flashing a cursor, but after 15 minutes of this, nothing seems to be happening. Given that there are no error messages I'm hesitant to reboot again. Is it normal for a RAID card to sit without a status message when it firsts boots, maybe to initialise the drives or something? The current screen output looks a bit like this: Controller #00 found at PCI Slot:01, Bus:01, Dev:00, Func:00 Controller Model: Adaptec 6405E Firmware Version: 5.2-0[18512] Memory Size: 128MB Serial number: 111111111111111 SAS WWN: 50000D1104AE9180 _ Update: So after waiting 30 minutes I've rebooted back to the Kernal Stopped Running error. Maybe time to update the RAID BIOS.

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• USB Device Not Recognized

  - by Franky Chanyau

  Ok this one gets a little bit complicated but bare with me :D A client brought her computer in to be fixed about a week ago, she says she tried charging a new phone she bought from china and immediately after her usb keyboard and mouse stopped working (typical). I had a quick look at it but because I did not have time, I did a simple system restore and it seemed as if the issue was fixed. I promptly sent it back to her but a few days back she called saying that the issue has returned. Turns out the computer was riddled with some virus that also corrupted her XP install so I had to format the whole thing(yes I tried repairing). I hoped that the format would fix the keyboard and mouse issue but the whole thing has escalated and the computer will throw the "USB Device not recognized" error when I plug anything into the many usb ports it has. I have installed all the drivers (including the chip set drivers) for the pc and even tried the unplugging from the power for a while trick, still no luck. I am sure it is not a hardware issue, but may be wrong. This is way over my head. Can anyone help? Computer: HP Compaq DC7100, Intel Pentium 4, 512mb RAM OS: Windows XP Professional SP2

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• Samba4/Ubuntu Shares Incorrectly Available to All Users

  - by Dan

  I've got my Ubuntu server working with Samba4 and got it set up as the Primary domain controller on my network with AD and all that goodness. However, I'm trying to get my Samba configuration to work with the users and groups I've defined with the Active Directory tools from Windows. For instance, I've got a share X which I want users A and B (as part of the 'management' group, known as LLGrpManager in my setup) to see, but no body else. However, after making changes to the configuration, restarting Samba, I test by connecting to the share with my Mac over Samba as user 'C' which isn't part of the management group, and I can, incorrectly, see the X share. I've tried alsorts of combinations of specifying the group with no luck at all. I've got a feeling that my global config might be too lenient or something to do with file permissions but being a bit green, I'm without clue. My /etc/samba/smb.conf # Global parameters [global] server role = domain controller server string = Office Server workgroup = LLDOMAIN realm = lldomain.local netbios name = DUMBO passdb backend = samba4 logon path = \\%L\profiles\%U logon drive = L: log file = /var/log/samba/%m.log max log size = 50 security = ads domain logons = yes domain master = auto usershare allow guests = no valid users = %S [netlogon] path = /var/lib/samba/sysvol/lldomain.local/scripts read only = no guest ok = no [sysvol] path = /var/lib/samba/sysvol read only = No guest ok = no valid users = @LLDOMAIN\LLGrpManager [ShareX] path = /data comment = Entire Data Volume guest ok = no comment = Entire Data Volume guest ok = no valid users = @LLDOMAIN\LLGrpManager admin users = @LLDOMAIN\LLGrpManager browsable = no inherit acls = yes inherit permissions = yes ... My /etc/nsswitch.conf I've also instructed the system to use the nss winbind library when searching for users or groups by adding the stanza passwd and group in /etc/nsswitch.conf: passwd: compat winbind group: compat winbind shadow: compat Permissions on the folder in question drwxrwxrwt 8 root root 4.0K Oct 28 19:11 data

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• What can I do to prevent system power downs?

  - by Joe King

  Yesterday I was given my brother's old laptop - core i7, 2.67GHz, 8GB RAM, 128GB SSD, Win7 64 bit. It's a Sony Vaio Z11. Approx 18 months old. When running something computationally intensive, the fan starts up and after about 30 secs it just powers itself down with no warning. I guess it is overheating. There is nothing in the event logs to suggest what is causing it - the only thing I see is "the last system shutdown was unexpected" or something similar. This is a problem for me because I use a lot of number crunching apps, which pretty much makes it useless to me. I would like to know if there is anything I can do, other than the obvious things I've done already - open up and clean out dust, re-install the OS. According to my brother, this problem started about 6 months ago when it was already outside warranty. If it's just used for simple things - web browsing, word processing etc, the problem does not occur. Any ideas for what I can do to fix this ? Update: I found that the laptop has 2 hardware settings for graphics: Speed and Stamina - the Speed setting seems to use an nvidia GEforce GT 330M, while the Stamina setting uses an Intel chipset. With the setting on Speed, I can hear the fan the whole time, and the system powers down after a short while (5-10 mins) even just doing basic tasks (browsing this site for example), but doesn't shut down if I just leave it switched on. In this mode it also sometimes just freezes the screen and I have to power off myself. However on Stamina setting it only powers down when doing number crunching and never freezes the screen.

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• Monitoring whether Google Apps email address is reachable

  - by Acorn

  Backstory: I bungled things a bit the other day, and inadvertantly deleted the DNS overrides for my domain including the MX records that point to Google Apps, causing 2 days of lost emails. What I want: I want to be able to monitor the email address/account so that I can be alerted if for any reason something has gone wrong and emails aren't arriving. Thoughts: I was thinking there might be a way to test the email without having to send an actual message. Does this exist? This wouldn't help if the DNS has reset itself to a different mailserver would it? The other idea was sending periodic emails to check the address it working. How would you automate this? You'd need to somehow check that the email address had arrived as well as checking if it had bounced. Are there any scripts that exist that would do something like this? What would be the best method? Maybe a combination of checking that the MX records for the domain are set to what they're supposed to be set to, and sending automatic test emails to check that things are still functioning on the Google Apps end?

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• iptables forwarding to a dummy interface

  - by madinc

  Hi, I'm trying to accomplish the following: I have a box with a service listening on a dummy interface (say 172.16.0.1), udp port 5555. Now what I'd like to do is to take packets that arrive on interfaces eth0 (1.1.1.1:5555) and eth1 (2.2.2.2:5555) and forward them to the service on the dummy interface, and have replies go back to clients out the same physical interface they came in. Clients must think they're talking to 1.1.1.1:5555 or 2.2.2.2:5555. I think I need a mix of iptables rules and packet marking, plus some iproute rules (if it's possible at all). What I tried is to catch packets coming in from eth0 and eth1, udp port 5555, and mark them with 1 and 2 respectively, and --save-mark in the connmark. Then I used a DNAT to 172.16.0.1. The service seems to be getting the packets. Now I'm not sure how to do the reverse. It seems that for packets originating from the box, you can't do anything before the routing decision, but that would be the place to restore the marks, and thus make a routing decision based on those. Here's what I have so far: iptables -t mangle -A PREROUTING -d 1.1.1.1 -p udp --port 5555 -j MARK --set-mark 1 iptables -t mangle -A PREROUTING -d 2.2.2.2 -p udp --port 5555 -j MARK --set-mark 2 iptables -t mangle -A PREROUTING -d 1.1.1.1 -p udp --port 5555 -j CONNMARK --save-mark iptables -t mangle -A PREROUTING -d 2.2.2.2 -p udp --port 5555 -j CONNMARK --save-mark iptables -t nat -A PREROUTING -m mark --mark 1 -j DNAT --to-destination 172.16.0.1 iptables -t nat -A PREROUTING -m mark --mark 2 -j DNAT --to-destination 172.16.0.1 # What next? As I said, I'm not even sure it can be done. To give a bit of background, it's an old OpenVPN installation that cannot be upgraded (otherwise I'd install a recent version that supports multihoming natively). Thanks for any help.

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• Understanding RedHats recommended tuned profiles

  - by espenfjo

  We are going to roll out tuned (and numad) on ~1000 servers, the majority of them being VMware servers either on NetApp or 3Par storage. According to RedHats documentation we should choose the virtual-guestprofile. What it is doing can be seen here: tuned.conf We are changing the IO scheduler to NOOP as both VMware and the NetApp/3Par should do sufficient scheduling for us. However, after investigating a bit I am not sure why they are increasing vm.dirty_ratio and kernel.sched_min_granularity_ns. As far as I have understood increasing increasing vm.dirty_ratio to 40% will mean that for a server with 20GB ram, 8GB can be dirty at any given time unless vm.dirty_writeback_centisecsis hit first. And while flushing these 8GB all IO for the application will be blocked until the dirty pages are freed. Increasing the dirty_ratio would probably mean higher write performance at peaks as we now have a larger cache, but then again when the cache fills IO will be blocked for a considerably longer time (Several seconds). The other is why they are increasing the sched_min_granularity_ns. If I understand it correctly increasing this value will decrease the number of time slices per epoch(sched_latency_ns) meaning that running tasks will get more time to finish their work. I can understand this being a very good thing for applications with very few threads, but for eg. apache or other processes with a lot of threads would this not be counter-productive?

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• What ways are there to set permissions on an Exchange 2003 mailbox?

  - by HopelessN00b

  I'm having a difficult/impossible time tracing down a permissions issue on an Exchange 2003 mailbox, and I was wondering if I'm missing any technical possibilities here. The basic question is what ways are there to set a user's permissions to access a mailbox in Exchange 2003? I know of two. Permissions on the mailbox itself (Mailbox Rights) and having delegated rights. And then, if it's possible, how would one view all the permissions (including delegated permissions) on the mailbox? The situation is that a new user who's been set up "exactly like all the others" in his department (pretty sure he was copied via the right click option in ADUC, in fact) can't access a specific shared mailbox, which I've been assured about a dozen other people do have access to and access on a regular basis. As to how they got permissions to the mailbox, no one knows, so it must have been granted by a white wizard whose spell has since worn off, so now IT has to handle it instead. Anyway... This mailbox is a normal AD user, created as a service account, for which no one knows the password (of course), so it's probably not the case that this service account was being used to delegate permissions. Upon taking examining the Mailbox Rights directly... Here are the permissions I see: This leads me to believe that one of two things are happening - the managers have been delegating full mailbox permissions to the rest of the department, or everyone's logging in using... not their own account. But, before I get too excited about the prospect of busting out the LART and strolling over to that department, I want to make sure I'm not missing another possible explanation. Like most of the rest of the world, I ditched Exchange 2003 at the earliest possible opportunity, and had been looking forward to never seeing it again, so I'm a bit rusty on the intricacies of how it [mostly, sort of] works. Anyone see any or possibilities, or things I may have missed, or does the LART get to come out and play?

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• Looking for a recommendation on measuring a high availability app that is using a CDN.

  - by T Reddy

  I work for a Fortune 500 company that struggles with accurately measuring performance and availability for high availability applications (i.e., apps that are up 99.5% with 5 seconds page to page navigation). We factor in both scheduled and unscheduled downtime to determine this availability number. However, we recently added a CDN into the mix, which kind of complicates our metrics a bit. The CDN now handles about 75% of our traffic, while sending the remainder to our own servers. We attempt to measure what we call a "true user experience" (i.e., our testing scripts emulate a typical user clicking through the application.) These monitoring scripts sit outside of our network, which means we're hitting the CDN about 75% of the time. Management has decided that we take the worst case scenario to measure availability. So if our origin servers are having problems, but yet the CDN is serving content just fine, we still take a hit on availability. The same is true the other way around. My thought is that as long as the "user experience" is successful, we should not unnecessarily punish ourselves. After all, a CDN is there to improve performance and availability! I'm just wondering if anyone has any knowledge of how other Fortune 500 companies calculate their availability numbers? I look at apple.com, for instance, of a storefront that uses a CDN that never seems to be down (unless there is about to be a major product announcement.) It would be great to have some hard, factual data because I don't believe that we need to unnecessarily hurt ourselves on these metrics. We are making business decisions based on these numbers. I can say, however, given that these metrics are visible to management, issues get addressed and resolved pretty fast (read: we cut through the red-tape pretty quick.) Unfortunately, as a developer, I don't want management to think that the application is up or down because some external factor (i.e., CDN) is influencing the numbers. Thoughts? (I mistakenly posted this question on StackOverflow, sorry in advance for the cross-post)

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• On AWS EC2, Unable to run sudo command after modifying permissions to /usr folder

  - by Kayote

  All, We have searched quite a bit and a few of 'Eliah Kagan's' posts are great about getting access back to sudo. However, our server is on AWS EC2 & I am a complete newbie to this. We are trying to setup Cronjobs for backing up our server data. What we did: Using Putty, we created a script file: usr/share/site-db-backup/backupToS3.php, however, Ubuntu was not saving the changes we made as it reported we did not have permission as user 'Ubuntu'. Error details are: "Upload of file backupToS3.php was successful but error occurred while setting the permission &/ or timestamp. If the problem persists, turn on 'ignore permission errors' option. Permission denied. Error code: 3 Request code 9" So, we ran the command "sudo chmod -R a+rwx /usr" for granting permission to the folder 'usr'. However, now whatever sudo command is run, we get the error: "/usr/lib/sudo/sudoers.so must be only be writable by owner. fatal error, unable to load plugins." We are complete newbies to Ubuntu & EC2 so do need step by step guidance of how to get sudo back & successfully write to the Crontab script sitting in 'usr/' folder.

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• What is the IPv6 equivalent to IPv4 RFC1918 addresses?

  - by Kumba

  Having a hard time wrapping my head around IPv6 here. A lot of the lingo seems targeted at enterprise-level IPv6 deployments, discussing link-local, site-local, global unicast, scopes, etc. Not a lot of solid information on really small networks, like home networks. I want to check my thinking and make sure I am getting the correct translations from IPv4-speak to IPv6-speak. The first question is, what's the equivalent of RFC1918 for IPv6? Initial searches suggested there was no equivalent. Then I stumbled upon Unique Local Addresses (RFC4193), and that states that all ULA's should be assigned the prefix fc00, followed by a 40-bit random number in the routing prefix. This random number is to "prevent collisions when two IPv6 networks are interconnected" -- again, another reference to an enterprise-level function. If I have a small local LAN at home, numbered using 192.168.4.0/24, what's my equivalent in IPv6's ULA scope? Assuming I will never, ever, tie that IPv6 address into the real internet (a router will NAT & firewall it), can I ignore the RFC to an extent and go with fc00::4:0/120? It also seems that any address in fc00::/7 are to be globally routable. Does this mean I'll need extra protections so my router would not automatically start advertising these private IPv6 addresses to the world? Second question, what's this link-local thing? Reading suggests a default-assigned address in the fe80::/10 range that has the last 64bits of the address comprised of the interface's MAC address. Seems to be required, too, but I'm annoyed by the constant discussion of it in relation to enterprise networks. Third question, what is scope id for? Seems to be yet another term tossed around in relation to enterprise networks, especially when interconnecting them, but almost no explanation on the smaller home network level. Can I see a scope ID AND CIDR notation used together? I.e., fc00::4:0/120%6, or are scope IDs only supposed to be applied to a single /128 IPv6 address?

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• My linux server "Number of processes created" and "Context switches" are growing incredibly fast

  - by Jorge Fuentes González

  I have a strange behaviour in my server :-/. Is a OpenVZ VPS (I think is OpenVZ, because /proc/user_beancounters exists and df -h returns /dev/simfs drive. Also ifconfig returns venet0). When I do cat /proc/stat, I can see how each second about 50-100 processes are created and happens about 800k-1200k context switches! All that info is with the server completely idle, no traffic nor programs running. Top shows 0 load average and 100% idle CPU. I've closed all non-needed services (httpd, mysqld, sendmail, nagios, named...) and the problem still happens. I do ps -ALf each second too and I don't see any changes, only a new ps process is created each time and the PID is just the same as before + 1, so new processes are not created, so I thought that process growing in cat /proc/stat must be threads (Yes, seems that processes in /proc/stat counts threads creation too as this states: http://webcache.googleusercontent.com/search?q=cache:8NLgzKEzHQQJ:www.linuxhowtos.org/System/procstat.htm&hl=es&tbo=d&gl=es&strip=1). I've changed to /proc dir and done cat [PID]\status with all PIDs listed with ls (Including kernel ones) and in any process voluntary_ctxt_switches nor nonvoluntary_ctxt_switches are growing at the same speed as cat /proc/stat does (just a few tens/second), Threads keeps the same also. I've done strace -p PID to all process too so I can see if any process is crating threads or something but the only process that has a bit of movement is ssh and that movement is read/write operations because of the data is sending to my terminal. After that, I've done vmstat -s and saw that forks is growing at the same speed processes in /proc/stat does. As http://linux.die.net/man/2/fork says, each fork() creates a new PID but my server PID is not growing! The last thing I can think of is that all process data that proc/stat and vmstat -s show is shared with all the other VPS stored in the same machine, but I don't know if that is correct... If someone can throw some light on this I would be really grateful.

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• Bridging my laptop's wireless and wired adaptors

  - by stacey.richards

  I would like to be able to connect a desktop computer that does not have a wireless adapter to my wireless network. I could just run a network cable from my ADSL/wireless router to the desktop computer but sometimes this is not practical. What I would really like to do is bridge my laptop's wireless and wired adapters in such a way that I can run a network cable from my laptop to a switch and another network cable from the switch to a desktop computer so that the desktop computer can access the Internet through my ADSL/wireless router via my latop: +--------------------+ |ADSL/wireless router| +--------------------+ | +-------------------------+ |laptop's wireless adaptor| | | |laptop's wired adaptor | +-------------------------+ | +------+ |switch| +------+ | +-----------------------+ |desktop's wired adapter| +-----------------------+ A bit of Googling suggests that I can do this by bridging my laptop's wireless and wired adapters. In Windows XP's Network Connections I select both the Local Area Connection and the Wireless Network Connection, right click and select Bridge Connections. From what I gather, this (layer 2?) bridge will examine the MAC address of traffic coming from the wireless network and pass it through to the wired network if it suspects that a network adapter with that MAC address may be on the wired side, and vice-versa. If this is the case, I would assume that when the desktop computer attempts to get an IP address from a DHCP server (which is running on the ADSL/wireless router), it would send a DHCP broadcast packet which would pass through the laptop's bridge to the router and the reply would return through the laptop's bridge back to the desktop. This doesn't happen. With some more Googling I find some instruction how this can be done with Linux. I reboot to Ubuntu 9.10 and type the following: sudo apt-get install bridge-utils sudo brctl addbr br0 sudo brctl addif br0 wlan0 sudo brctl addif br0 eth0 sudo ipconfig wlan0 0.0.0.0 sudo ipconfig eth0 0.0.0.0 Once again, the desktop cannot reach the ADSL/wireless router. I suspect that I'm missing some simple important step. Can anyone shed some light on this for me?

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• Unattended Kickstart Install

  - by Eric

  I've looked around quite a bit and have seen similar setup and questions, but none seem to work for me. I'm using the following command to create a custom ISO: /usr/bin/livecd-creator --config=/usr/share/livecd-tools/test.ks --fslabel=TestAppliance --cache=/var/cache/live This works great and it creates the ISO with all of the packages and configs I want on it. My issue is that I want the install to be unattended. However, every time I start the CD, it asks for all of the info such as keyboard, time zone, root password, etc. These are my basic settings I have in my kickstart script prior to the packages section. cdrom install autopart autostep xconfig --startxonboot rootpw testpassword lang en_US.UTF-8 keyboard us timezone --utc America/New_York auth --useshadow --enablemd5 selinux --disabled services --enabled=iptables,rsyslog,sshd,ntpd,NetworkManager,network --disabled=sendmail,cups,firstboot,ip6tables clearpart --all So after looking around, I was told that I need to modify my isolinux.cfg file to either do "ks=http://X.X.X.X/location/to/test.ks" or "ks=cdrom:/test.ks". I've tried both methods and it still forces me to go through the install process. When I tail the apache logs on the server, I see that the ISO never even tries to get the file. Below are the exact syntax I'm trying on my isolinux.cfg file. label http menu label HTTP kernel vmlinuz0 append initrd=initrd0.img ks=http://192.168.56.101/files/test.ks ksdevice=eth0 label localks menu label LocalKS kernel vmlinuz0 append initrd=initrd0.img ks=cdrom:/test.ks label install0 menu label Install kernel vmlinuz0 append initrd=initrd0.img root=live:CDLABEL=PerimeterAppliance rootfstype=auto ro liveimg liveinst noswap rd_NO_LUKS rd_NO_MD rd_NO_DM menu default EOF_boot_menu The first 2 give me a "dracut: fatal: no or empty root=" error until I give it a root= option and then it just skips the kickstart completely. The last one is my default option that works fine, but just requires a lot of user input. Any help would be greatly appreciated.

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• Malware Defense Shows Up in PlayOn Settings/Logs Although System Has Been Thoroughly Cleaned

  - by nicorellius

  I was hit really hard by some nasty malware: Malware Defense. I was doing something I should not have been doing when I got it (surfing Pirate Bay for TV shows). It locked up my system and I had to reboot in safe mode. I was able to shut down the process and remove it using a malware killer tool. I then installed, after my machine was cleaned up a bit, Clamwin, Malwarebytes, and another AV tool. I cleaned the heck out of my system. Simultaneously, while this was going on, I was having trouble with my media-server, PlayOn. This tool is great, but has some bugs. One in particular is that it will not function well with AV software running. I found a way to allow the new AV software to run while using PlayOn, but it still says I have Malware Defense on. Firstly, Malware Defense is long gone. I cleaned all remnants from my registry and scoured my system with the above tools multiple times. PlayOn is getting some information that I have this crap installed on my system, but it's not. The system runs OK, but not optimally. I have a feeling it is causing my streaming to be interrupted sometimes. How is it that I can't even find Malware Defense on my system if I tried but yet somehow PlayOn is getting a finger print of it somewhere? I have gone back and forth with MediaMall to no avail. I kind of just gave up, because the streaming works OK. BTW, I also uninstalled/reinstalled PlayOn several times, reverted back to previous versions, etc. The only thing I haven't done is reformat my disk and reinstall Windows. I really don't want to do this if there is another way to remove this little print. Any ideas?

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