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• Win Svr 2003 DHCP Bad Addresses

  - by VinceM

  After looking at other posts I still can figure this out. I'll start at the beginning... I inherited this network and I'm not the most knowledgeable about networking... We have a AD DHCP Server that is also our DNS server, We were having some VPN issues (on the same server) and my boss decided to disable routing and remote access, which cleared the settings. We couldn't get it set back up correctly so we rolled back to a backup drive they created a number of months ago. Since rolling back I've had Bad_Address listings in DHCP and there is a number of duplicate records in the DNS Forward Lookup Zones. We have less than 50 devices on the network but I have over 90 Bad Addresses showing. This server is currently running but we get IP address conflicts all the time on pretty much all the computers. I have had people do release and renew but it didn't help... I have also deleted and re-added the scope to no avail either. Any help or ideas would be greatly appreciated and I apologize if I missed another post that has information to help. Thanks, Vince

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• What is the quickest and safest way to test new software and revert all changes, if needed?

  - by calbar

  I'm looking for Windows software that will allow me to quickly create a "checkpoint", do whatever I might need to do to my computer - install programs/drivers/updates, create/delete personal files, reboot the system multiple times, open questionable attachments - and then revert the entire system back to when the checkpoint was created. Essentially I want Windows Restore Points that save my personal files and partitions, too. It sounds like disk imaging might be the ticket, but creating them is much too slow and the restore process too involved... I'm hoping to sacrifice full disaster recovery for speed. Creating a checkpoint should be as close to one-click as possible, and rolling back should be a matter of selecting a restore point and rebooting. Ding! I'm familiar with Sandboxie, True Image Home "Try and Decide", Returnil, and a number of other "virtual system" apps that actively "catch" changes and allow you to commit or reject them. I'm not interested in these for a number of reasons - I prefer the "cut and dry" restore point approach. Finally, I'll note that I've just recently become aware of Comodo Time Machine. It sounds absolutely perfect, however, a quick skim through the user forums show more than a few horror stories of corrupted, unbootable systems. Any positive personal experience with the software to suppress my superstitions, or suggestions for more established alternatives would be greatly appreciated - Comodo Time Machine seems relatively new. Thanks for your help!

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• Road Warrior VPN Setup

  - by wobblycogs

  I apologise up front for the rather open ended nature of this question but I've got well out of my depth and could really do with some pointers. I need to set up a road warrior VPN solution which will allow our customers to securely access a number of services we provide for them. Customer machines will be running a variety of Windows versions from XP onwards with a variety of patch levels. Typically they will connect from the clients main offices but not always. It is safe to assume that all clients will be behind NATs but we may occasionally see a connection that isn't NAT'ed. Typical connection situation is therefore: Customer Laptop -- Router (NAT) -- Internet -- VPN Server + Firewall -- Server (Win 2008 R2, Non-routable IP) There will initially be a dozen or so people that could connect but that will grow quickly to around 100. It's unlikely that we'll see that many concurrent connections though, I imagine our total VPN throughput would be <50Mbps peak. What are my options for setting this up? I've been trying to set up a system like this using a MikroTik router for a few days but have struggled to get it working correctly, particularly with NAT'ed clients. I've had a quick look at OpenVPN and liked what I saw but I think it's unlikely our customers IT departments would allow the client to be installed. Finally I've looked at the Cisco ASA range but I'm on a fairly tight budget so this is less preferable but it looks like it would work pretty much out of the box. My fall back position is to connect the server directly and use the provided VPN + Firewall facilities but that is far from ideal as the number of servers is likely to grow over time.

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• RAID controller dropping the wrong drive

  - by bramp

  I've been having an issue with 3ware 9500S-8 RAID 10, and I have contracted their tech support, but I wanted to hear the serverfault community's recommendations. Firstly, all my data is backuped and secure, so I don't mind blowing my RAID away if I have to. But let me describe the problem I've been seeing. A month ago, disk 6 dropped out of the RAID. It is mirrored with disk 7, so I wasn't that bothered. I went to the data centre and replaced it. When I got back to the office, I noticed that disk 6 will still not in the RAID, and in fact the controller was show the name of the old drive still. A week later I went back and replace the drive again, thinking I might have swapped in a bad drive. Still the same problem. I decided to reboot the machine, to see if that would "force" the controller into seeing the new drive. It did, and a rebuild started to happen (from disk 7). Eventually both drives were showing as good. A week later, the MySQL database has flagged the database is corrupt, and is unable to repair it. I don't know what has gone wrong, but I suspected this 6-7 pair. At this point I noticed that the RAID had constantly been verifying itself, over and over. Regardless of this I began to rebuild the database, which took about 19 hours. It's a big database. Near the end of the repair, the RAID controller told me it had dropped disk 7, and that some data was most likely corrupted. I contacted LSI tech support, and they very promptly started to help me. I mentioned that drive 7 had been dropped. They suspect that drive 7 was always at fault, and drive 6 had always been good. I want to know how often a RAID controller would drop the wrong drive (in this case dropping drive 6 a month ago, instead of 7). I foolishly didn't run smartctl on the drives before I started swapping them out. I just assumed the RAID controller knew what it was talking about. I think my plan of action is to replace drive 7, rebuild the array from scratch, double check smartctl on ALL the disks, and then start restoring my data again. I would appreciate anyone's input on what the correct procedure for swapping drives is, and how often failures like this happen. If anyone would like more information then I'd be happy to provide it. thanks in advance. Oh some more information. I'm running CentOS 5.3, with two RAID arrays, a simple RAID 1 for the OS, and RAID 10 for the database. Both arrays are on different controllers. The RAID 10 is made of 10 identical ST3640323AS drives, until I swapped in a SAMSUNG HD103SJ last month.

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• Comparing 2 (or 3 Files If Possible) "Line By Line"

  - by PythEch

  I want to find out the differences of 2 (or 3 files if possible) line by line. Diff utils can do this, however it gives inaccurate results. Because, 2 files have exact number of lines which is "134". But diff gives me "Added Lines" and "Removed Lines". However this is wrong, they have exact the same number of lines, there is no added or removed lines. The text files which I want to find differences of them, have only numbers written, maybe that's why that algortihm fails. I couldn't find any option to prevent that, however I may be wrong, I mean there should be an option for that, but again, I couldn't find. This is what I get (5am.txt vs 6am.txt, there is a huge problem): This is what I want (6am.txt vs 7am.txt, still has problems): But, first the first image still has this problem, at the last lines. Edit: After I figured out that there is no utility to do this, I handled myself. I almost did the same thing as what RedGrittyBrick have done. This script imitates diff utility so I (or you) can use it with diff2html. To use it with diff2html, just change line diff_stdout = os.popen("diff %s" % string.join(argv[1:]), "r") to diff_stdout = os.popen("script.py %s" % string.join(argv[1:]), "r") and name this script whatever you want: import sys f1=open(sys.argv[1],"r") f1_read=f1.readlines() f1.close() f2=open(sys.argv[2],"r") f2_read=f2.readlines() f2.close() changed={} first_c = "" for n in range(len(f1_read)): if f1_read[n]!=f2_read[n]: if first_c == "": first_c=n+1 changed[first_c]=n+1 else: first_c="" #Let's imitate diff-utils... for (x, y) in changed.items(): print "%d,%dc%d,%d" % (x,y,x,y) for i in range(x,y+1): sys.stdout.write("< %s" % f1_read[i-1]) print "---" for i in range(x,y+1): sys.stdout.write("> %s" % f2_read[i-1]) Final results:

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• Wake-on-lan only works so many times

  - by Chance

  I have Wake-on-lan configured on my Windows XP machine so that the computer will wake up from Standby. Waking the computer from Standby via network traffic seems to work a certain number of times, say 4 or 5, then it stops working. If I restart the computer it seems to reset this behavior so that I can use WOL a few more times before it starts working. I use the command "wol" on my other, Linux machine with the appropriate IP address and MAC address of the card. I looked at the network card to see if it had different lights when WOL worked and when it didn't. When it has a solid amber light where the ethernet cable connects, WOL seems to work. When it has a flashing amber light, WOL does not. It seems that the system seems to almost "shut off" the card when it falls to sleep, but I don't know if this is a function of time or number of standby/wakeups. I have a 3Com 3c920 network card. If I look at the properties in Device Manager, I have "Allow this Device to bring the Computer out of Standby" checked. In the Advanced tab I have anything related to RWU (Remote Wake Up) enabled. I also believe I have the appropriate settings in BIOS related to Remote Wake-Up and I have tried both S1 and S3 power configurations in the BIOS. Intuitively, I would think I would uncheck "Allow the Computer to turn off this device to save power", but doing so disables the "Allow this Device to bring the Computer out of Standby" option. Does anyone know what is happening here or if there is a way to fix it? I have an integrated network card; would getting one that goes into a slot be better? I am running Windows XP on a Dell Optiplex GX240 with a 3Com 3c920 network card.

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• Importing long numerical identifiers into Excel

  - by Niels Basjes

  I have some data in a database that uses ids that have the form of 16 digit numbers. In some situations i need to export the data in such a way that it can be manipulated in excel. So i export the data into a file and import it into excel. I've tried several file formats and I'm stuck. The problem I'm facing is that when reading a file into excel that has a cell that looks like a number then excel treats it as a number. The catch is that (as far as i can tell) all numerical values in excel are double precision floating point which have a precision of less than 16 digits. So my ids are changed: very often the last digit its changed to a 0. So far I've only been able to convince excel to keep the Id unchanged by breaking it myself: by adding a letter or symbol to the Id. This however means that in order to use the value again it must be "unbroken". Is there a way to create a file where i can specify that excel must treat the value as a text without changing the value? Or its there a way to let excel treat the value as a long (64bit integer)?

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• VT-x not enabled on 2010 Mac Pro

  - by BlindingDawn

  To start I had a Hackintosh as per the instructions from Lifehacker.com before and moved everything to a new 2010 8 Core Mac Pro. I opted for a restore from the time machine backup rather than using the migration assistance. I believe this may have caused more problems but one in particular is the lack of VT-x support. When I checked Parallels Desktop under "Host Hardware" information, I get the following that shows that VT-x isn't enabled. <Cpu dyn_lists=""> <Number>16</Number> <Model>Intel(R) Xeon(R) CPU E5620 @ 2.40GHz</Model> <Mode>1</Mode> <Speed>2400</Speed> <VtxEnabled>0</VtxEnabled> <VtxMode>1</VtxMode> 1) Does Parallels Desktop support using VT-x? 2) Does this setting show that my VT-x isn't enabled? 3) Is there a way of fixing it so that it is enabled? 4) Is there a way of using my Time Machine backup as if I'm doing a restore using migration assistance and just restore the files and settings?

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• When should NTPd broadcast/broadcastclient be used instead of client/server or peer modes?

  - by Luke404

  The NTP deamon if often used in its simplest mode, which is client/server: you specify one or more server directives in your ntp.conf and your clients will use those servers. In addition to that, when you run your own NTP servers, it is good practice to peer them together, so if one of them looses connectivity to its upstream servers, it will get time from its peers. But NTPd can also work with broadcast and/or multicast distribution of time data, with the documentation stating: broadcast and multicast modes are intended for configurations involving one or a few servers and a possibly very large client population The documentation also says elsewhere: It is possible and frequently useful to configure a host as both broadcast client and broadcast server. A number of hosts configured this way and sharing a common broadcast address will automatically organize themselves in an optimum configuration based on stratum and synchronization distance. I can see one obvious administrative benefit: you don't have to manually specify and update your list of NTP servers in the clients ntp.conf, so to me it looks tempting to use broadcast mode even for a small client population (say 5+ clients with 3~4 servers). I expect network traffic to be a little higher with broadcasts instead of client/server associations, but given the usual gigabit ethernet LAN the impact should be negligible unless you have a very very large number of hosts in the same broadcast domain. At the end of the day, when should broadcast mode be used or avoided? Are there pros and cons I haven't seen?

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• How to organize deployment process in Chef-controlled environment?

  - by Alex

  I have a web Linux-based infrastructure which consists of 15 virtual machines and over 50 various services. It is fully controlled by Chef. Most of the services are developed internally. Basically the current deployment process is triggered by a shell script. A build system (a mix of Python and shell scripts) packages the services as .deb files and puts these packages into a repo. It runs apt-get update on all 15 nodes then because the standard Chef apt cookbook only runs apt-get once per day and we definitely do not want to run apt-get update unconditionally on each chef-client wake. The build system restarts chef-client daemons on all 15 nodes finally (we need this step because of pull Chef nature). The current process has a number of drawbacks we want to address. First off, it is asynchronous because the deployment script does not check chef-client logs after restart so we don't even know if the deployment was successful. It does not even wait for Chef clients to complete the cycle. Second, we definitely do not want to force chef-client restarts on all nodes because we usually deploy only a small number of packages. And third, I am not quite sure using chef-client for deployment is legitimate, probably we are just doing it wrong from the start. Please share your thoughts/experience.

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• How to include worksheet 3 and 4 in a cell formula provided?

  - by user21255

  I have been kindly given this formula with an explanation on how it works: Insert this formula into the cell B4 of the sheet "Cases": =IF(NOT(ISBLANK('1st'!B25)),'1st'!B25,IF(NOT(ISBLANK(INDIRECT("'2nd'!R" & (ROW($B4)-(COUNTA('1st'!$B:$B)-COUNTA('1st'!$B$1:$B$24))-4+25) & "C" & COLUMN(B4),FALSE))),INDIRECT("'2nd'!R" & (ROW($B4)-(COUNTA('1st'!$B:$B)-COUNTA('1st'!$B$1:$B$24))-4+25) & "C" & COLUMN(B4),FALSE),"")) Copy the formula to the other cells in the worksheet; the relative addresses will adjust automatically. The formula works like this: Check if there is content in 1st. If yes, copy it. If no, find out how many entries there are in 1st in total. (This is done by using the COUNTA function on the whole B column in 1st and subtracting the number of non-empty cells above the actual case data.) Use this information together with the current cells's number to find out the location of the cell that has to be copied from 2nd. Create the address of the cell and use the ISBLANK function on the INDIRECT function with that address to check if the cell is empty. If it is not, use the INDIRECT function again to display it. If it is empty, just display an empty string. Now this works fine when I have only 2 sheets. But lets say I want to include a third and fourth sheet (name as 3rd and 4th respectively), then what and should I put the formula for this in the formula above? There are actually 31 sheets but if I know how to add 3rd and 4th sheet in the formula, then I can figure out how to do the rest. Thanks

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• Salary Survey Entry Level network position [closed]

  - by will

  Hello, I started interning with a company about 5 months ago and for the past 7 months I have been a normal part time employee. This week I have a review, where I am hoping to get a raise. I started at $8 interning, and now I'm up to $13. What I am trying to figure out is how to survey what others are making in similar positions so I can take it to the review as a base number. here are my thoughts on my position right now. Review Thoughts My Qualifications: • Associates of applied Science - IT network Specialist • CompTIA A+ certification • CompTIA Server+ certification • CompTIA Network+ certification • Currently pursuing Cisco certifications • Junior status at Insert college Pursuing Bachelors in Information Technology with an emphasis in Networking. 3.4 GPA • 1 year of working at Insert Company. My contributions to Insert Company • Offering near fulltime through semester and fulltime through summer. • Ability to work after hours and on weekends • Developed and support helpdesk system • Set up and maintain Update server to keep desktop clients up to date • Deployed and maintain antivirus solution for end users • Assist with main projects such as SAN, Virtualization, and network survey. Any tips on determining an asking number would help. I was thinking $17-$18, am I way off here? • Migrating end user stations to Windows 7 (current project) • Developing imaging solution for Desktop PCs (current project)

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• lighttpd: why using port >= 9000 does not work properly

  - by yejinxin

  I had a lighttpd server which works normally. I can access this website from outside(non-localhost) via http://vm.aaa.com:8080. Let's just assume that it's a simple static website, without php or mysql. Now I want to copy this website as a test one(using another port) in the same machine. And I do not want to use virtual host. So I just copy the whole files of original server, including lighttpd's bin/ conf/ htdocs/ lib/ and so on folders. And I made some required change, including changing lighttpd.conf. Now what I'm confused is, if change the port to a number that is less than 9000, it works perfectly. But if the port is changed to a number that is equal or greater than 9000, lighttpd can start, but I can not access the new website from outside, while I do can access the new website from INSIDE(I mean in the same LAN or localhost). The access log from INSIDE is like below: vm.aaa.com:9876 10.46.175.117 - - [08/Oct/2012:13:18:47 +0800] "GET / HTTP/1.1" 200 15 "-" " curl/7.12.1 (x86_64-redhat-linux-gnu) libcurl/7.12.1 OpenSSL/0.9.7a zlib/1.2.1.2 libidn/0.5.6" Command I used to start lighttpd is: bin/lighttpd -f conf/lighttpd.conf -m lib/ -D My lighttpd.conf is like: server.modules = ( "mod_access", "mod_accesslog", ) var.rundir = "/home/work/lighttpd_9876" server.port = 9876 server.bind = "0.0.0.0" server.pid-file = var.rundir + "/log/lighttpd.pid" server.document-root = var.rundir + "/htdocs/" var.cronolog_path = "/home/work/lighttpd_9876/cronolog/sbin/cronolog" server.errorlog = ... accesslog.filename = ... ... So why is this happening? I've tried several diffrent ports, still the same. Isn't that ports between 8000 and 65535 are the same?

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• Disk usage on IIS, PHP5, performance problems.

  - by Jacob84

  Hi everybody, I'm quite worried with a performance problem that I'm facing in one of our production servers. I'm working for a hosting company, so you can imagine how heterogeneous the applications runnning here are. All started with a call of a client complaining about the speed loading a Joomla. The setup is IIS6 (Windows 2003) with PHP5 and FAST CGI wich normally works pretty well. I've tested the loading time and indeed, he was right. 7 or 8 seconds to load, when usually this can be accomplished in 2. Seeing this results, I started to check first CPU and RAM. Everithing normal, 2GB of RAM free, 3%-8% of CPU activity. That's what I call a relaxed server ;). Unfortunately, digging a little deeper I've found the 'PhysicalDisk' counters quite high (above 10), specially the read queues. I've used Process Explorer to see wich of those processes has the higher deltas, but everything seemed normal. As the problem is specially related to PHP pages, I've checked specific IIS counters, as Actual connections, Number of CGI requeriments and Number of ISAPI requeriments. CGI -> 3 to 7 ISAPI -> 5 to 9 Connections-> 90 to 120 (wich appears at the top of the graph) More than a solution (I know this is hard to find), I would like to know if you have an specifical methodology to face this kind of problems. Thanks a lot, as always.

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• MAMP Pro mysqld won't start on os x lion

  - by Mike

  getting a Start MySQL Failed error in the GUI.. when i attempt to start mysqld from the CLI i get the following error: ? /Applications/MAMP/Library/bin/mysqld 120623 23:12:47 [Warning] Setting lower_case_table_names=2 because file system for /Applications/MAMP/db/mysql/ is case insensitive 120623 23:12:47 [Note] Plugin 'FEDERATED' is disabled. 120623 23:12:47 InnoDB: The InnoDB memory heap is disabled 120623 23:12:47 InnoDB: Mutexes and rw_locks use GCC atomic builtins 120623 23:12:47 InnoDB: Compressed tables use zlib 1.2.3 120623 23:12:47 InnoDB: Initializing buffer pool, size = 128.0M 120623 23:12:47 InnoDB: Completed initialization of buffer pool 120623 23:12:47 InnoDB: highest supported file format is Barracuda. 120623 23:12:47 InnoDB: Waiting for the background threads to start 120623 23:12:48 InnoDB: 1.1.5 started; log sequence number 1595675 120623 23:12:48 [ERROR] /Applications/MAMP/Library/bin/mysqld: unknown option '--skip-locking' 120623 23:12:48 [ERROR] Aborting 120623 23:12:48 InnoDB: Starting shutdown... 120623 23:12:49 InnoDB: Shutdown completed; log sequence number 1595675 120623 23:12:49 [Note] /Applications/MAMP/Library/bin/mysqld: Shutdown complete i have deleted the mysql.pid file located at /application/mamp/tmp/mysql/mysql.pid and i still get the error above. I can't find where MAMP has set --skip-locking set, my.cnf doesnt have it anywhere. Activity monitor gives me a mysqld process running by me, and everytime i KILL the process both via Activity Monitor and via kill =9 pid it starts right back up.. Sampling the process points back to the MAMP mysqld.. wtf?! About to throw MAMP out the window and boot up a VM of CentOS =)

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• Ubuntu xrandr rotate issue

  - by user83544

  I've just bought a second monitor for my PC which happens to be a pivot monitor. I've already read lots of forums related to my problem but haven't come across a solution - I have the same symptoms as dozens of posts but no matter whatever I try it just doesn't work. I've already changed the xorg.conf file and added in the device section just under Driver "nvidia" the following for my second monitor: Option "RandRRotation" "on" When I save and reboot I try to rotate my screen with the nvidia X server settings by choosing the second monitor and clicking either "left" or "right" for the rotation. It immediately exits the nvidia settings window and does nothing. I tried within the terminal by typing: xrandr -o right I get the following error: X Error of failed request: BadMatch (invalid parameter attributes) Major opcode of failed request: 154 (RANDR) Minor opcode of failed request: 2 (RRSetScreenConfig) Serial number of failed request: 14 Current serial number in output stream: 14 I actually manage to rotate it with Option "Rotate" "CCW" instead of "RandRRotation". The problem with this solution is that you get the second monitor in the right position, but any window you open on that screen is practically unchangeable. You can't change the size nor move it, making it useless for reading PDFs, which is the main reason why I bought this second screen to help me write my thesis. Any help is really appreciated. sudo lshw -c video hiram@hiram-linux:~$ sudo lshw -c video *-display description: VGA compatible controller product: nVidia Corporation vendor: nVidia Corporation physical id: 0 bus info: pci@0000:01:00.0 version: a1 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress vga_controller bus_master cap_list rom configuration: driver=nvidia latency=0 resources: irq:16 memory:f8000000-f9ffffff memory:d8000000-dfffffff memory:d4000000-d7ffffff ioport:dc00(size=12 memory:fbd80000-fbdfffff

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• 7zip many files from different folders?

  - by mafutrct

  I would like to add a large number of files with different names from different folders to a single 7zip archive using 7za.exe. This should be simple, but it turned out to be a major pain. I created a file that contains the paths (7za -a @list.txt) but once there are too many (~100) files, it fails. Apparently the content of the argument file is pushed onto the command line buffer, which is far too small (the number of files to add is 1m). Splitting the process up by adding the files one by one is not feasible due to the way 7za works: When adding the next file, it creates a copy of the archive, adds the file to the copy and finally replaces the original. This is terribly slow once the archive gets to a couple 100MB in size. So far I am using a combination of the two approaches by adding a dozen files each time in a loop, but it is an unreliable hack and still very slow. Is there a better way to do it? I tried to use 7zip wrapper DLLs (I'm a C# programmer), but none of them worked reliably and I was repeatedly suggested to just use 7za instead.

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• ldapsearch against Active Directory fails

  - by Guacamole

  I am using ldapsearch from OpenLDAP tools to search our corporate Active Directory for my email and phone number. This query is a test to ensure that I can authenticate against the domain so I can set up a linux wiki with NTLM authentication. My theory is that if I can successfully query the AD for information, then I am a step closer to getting my wiki to authenticate against AD (I have instructions to set up moin wiki under ActiveDirectory). The problem is that I can't seem to get the ldapsearch query right. I have seen many tutorials on the net that indicate that -D should be something like -D "Americas\John_Marsharll"; however, I keep getting ldap_bind: Invalid credentials (49) error messages when I use Americas\John_Marshall. The only time I get sensical results is when I query with the parameters below. However, even then, I can't figure out how to get email and phone number. [John_Marsharll@WN7-BG3YSM1 ~]$ ldapsearch -x -h 10.1.1.1 \ -b "cn=Users,dc=Americas" mail telephonenumber -D "cn=John_Marshall,dc=Americas" # extended LDIF # # LDAPv3 # base <cn=Users,dc=Americas> with scope subtree # filter: (objectclass=*) # requesting: mail telephonenumber -D cn=John_Marshall,dc=Americas # # search result search: 2 result: 32 No such object # numResponses: 1 [John_Marshall@WN7-BG3YSM1 ~]$ Can someone give me pointers on what I'm doing wrong with the ldapsearch query above? Our AD ldap server is 10.1.1.1 and the AD domain is "Americas".

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• Understanding Microsoft Word Formatting Behavior. Does anyone?

  - by deemer

  This isn't a question about how to do something (well, not directly), but rather an inquiry to see if anyone understands why MS Word behaves the way it does with respect to formatting from a design perspective. This is also admittedly a rant about Word. This is a question that has plagued me, well, every time I open a document in Word, and covers a lot of individual topics, so I'll restrict the discussion here to two concrete behaviors that baffle me. 1) Backspacing over whitespace changes the format of preceding text. This seems to most often occur when the preceding text is a header or list number. The strangest thing about this is the new format of the changed text usually doesn't appear anywhere else in the document. 2) Numbered lists count almost at random. I am working on a document today where the list numbers count as follows: 1, 2, 2, 3, 3. The lettering in the sublists go like this 1: a, 2: a, 2: b c d, 3: e f g, 3: a. Clicking on each number or letter highlights the other numbers or letters that Word thinks it is related to, which are scattered around the document pretty heavily. Attempts to renumber the list have so far proven fruitless, as Word seems to maintain these associations through clipboard copies, etc. Why could this even happen?

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• Are there any viable DNS or LDAP alternatives for distributed key/value storage and retrieval?

  - by makerofthings7

  I'm working on a software app that needs distributed decentralized name resolution, and isn't bound to TCP/IP. Or more precisely, I need to store a "key" and look up it's value, and the key may be a string, a number, or any other realistic data type. Examples: With a phone number, look up a name. (or with an area code, redirect to the server that handles that exchange) With an IP Address get a DNS name, or a Whois contact (string value) With a string, get an IP, ( like a DNS TXT or SRV record). I'm thinking out of the box here and looking for any software that allows for this. (more info below) Are there any secure, scalable DNS alternatives that have gained notoriety? I could ask on StackOverflow, but think the infrastructure groups would have better insight on this. Edit More info: I'm looking at "Namecoin" the DNS version of Bitcoin, and since that project is faltering, I'm looking at alternative ways to store name-value pairs, with an optional qualifier. I think a name value pair is of global interest is useful, but on a limited scale. Namecoin tried to be too much, and ended up becoming nothing. I'm trying to solve that problem in researching alternatives and applying distributed technologies where applicable. Bitcoin/Namecoin offers a Distributed Hash Table, which has some positive aspects, but not useful for DNS, except for root servers.

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• sysbench memory test on ec2 small instance

  - by caribio

  I'm seeing a problem with sysbench memory test (the default version that's compiled in). This is on Ubuntu Maverick, sysbench installed via apt-get install sysbench. Running the same thing on Ubuntu @ Rackspace worked just as expected. While the CPU and I/O tests worked fine on EC2 servers, the memory test just runs without doing anything (notice the 0M in the test results). The instance used was the publicly available 'stock' Ubuntu image with no changes to it: ./ec2-run-instances ami-ccf405a5 --instance-type m1.small --region us-east-1 --key mykey Supplying more arguments (such as: --memory-block-size=1K --memory-total-size=102400M) didn't help. What am I doing wrong? Thanks. sysbench --num-threads=4 --test=memory run sysbench 0.4.12: multi-threaded system evaluation benchmark Running the test with following options: Number of threads: 4 Doing memory operations speed test Memory block size: 1K Memory transfer size: 0M Memory operations type: write Memory scope type: global Threads started! Done. Operations performed: 0 ( 0.00 ops/sec) 0.00 MB transferred (0.00 MB/sec) Test execution summary: total time: 0.0003s total number of events: 0 total time taken by event execution: 0.0000 per-request statistics: min: 18446744073709.55ms avg: 0.00ms max: 0.00ms Threads fairness: events (avg/stddev): 0.0000/0.00 execution time (avg/stddev): 0.0000/0.00

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• What is the "in-the-wire" size of a ethernet frame? 1518 or 1542?

  - by chrisapotek

  According to the table here, it says that MTU = 1500 bytes and that the payload part is 1500 - 42 bytes or 1458 bytes (<- this is actually wrong!). Now on top of that you have to add IPv4 and UDP headers, which are 28 bytes (20 IP + 8 UDP). That leaves my maximum possible application message to as 1430 bytes! But by looking for this number in the Internet I see 1472 instead. Am I doing this calculation wrong here? All I want to find out is the maximum application message I can send over the wire without the risk of fragmentation. It is definitely not 1500 because that includes the frame headers. Can someone help? The confusion is the the PAYLOAD can actually be as large as 1500 bytes and that's the MTU. So now what is the size in-the-wire for a payload of 1500? From that table it can be as big as 1542 bytes. So the maximum app messages I can send is 1472 (1500 - 20 (ip) - 8 (udp)) for a maximum in the wire size of 1542. It amazes me how things can get so complicated when they are actually simple. And I have not clue how someone came up with the number 1518 if the table says 1542.

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• how can i move ext3 partition to the beginning of drive without losing data?

  - by Felipe Alvarez

  I have a 500GB external drive. It had two partitions, each around 250GB. I removed the first partition. I'd like to move the 2nd to the left, so it consumes 100% of the drive. How can this be accomplished without any GUI tools (CLI only)? fdisk Disk /dev/sdd: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0xc80b1f3d Device Boot Start End Blocks Id System /dev/sdd2 29374 60801 252445410 83 Linux parted Model: ST350032 0AS (scsi) Disk /dev/sdd: 500GB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 2 242GB 500GB 259GB primary ext3 type=83 dumpe2fs Filesystem volume name: extstar Last mounted on: <not available> Filesystem UUID: f0b1d2bc-08b8-4f6e-b1c6-c529024a777d Filesystem magic number: 0xEF53 Filesystem revision #: 1 (dynamic) Filesystem features: has_journal dir_index filetype needs_recovery sparse_super large_file Filesystem flags: signed_directory_hash Default mount options: (none) Filesystem state: clean Errors behavior: Continue Filesystem OS type: Linux Inode count: 15808608 Block count: 63111168 Reserved block count: 0 Free blocks: 2449985 Free inodes: 15799302 First block: 0 Block size: 4096 Fragment size: 4096 Blocks per group: 32768 Fragments per group: 32768 Inodes per group: 8208 Inode blocks per group: 513 Filesystem created: Mon Feb 15 08:07:01 2010 Last mount time: Fri May 21 19:31:30 2010 Last write time: Fri May 21 19:31:30 2010 Mount count: 5 Maximum mount count: 29 Last checked: Mon May 17 14:52:47 2010 Check interval: 15552000 (6 months) Next check after: Sat Nov 13 14:52:47 2010 Reserved blocks uid: 0 (user root) Reserved blocks gid: 0 (group root) First inode: 11 Inode size: 256 Required extra isize: 28 Desired extra isize: 28 Journal inode: 8 Default directory hash: half_md4 Directory Hash Seed: d0363517-c095-4f53-baa7-7428c02fbfc6 Journal backup: inode blocks Journal size: 128M

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• How to prevent eMule from jamming up the router?

  - by the searcher

  Usually, when eMule is started, after some time, I find that the router is jammed, so the internet connection on that computer stopped working, or it seemed to be waiting for some port to be freed up before it can connect to a website. This sometimes affect even other PCs or Macs using the same router. Is there a way to prevent eMule from hogging too much resource or ports? I see that there is under Options -> Connection "Max Sources/File" and a "Connection Limits - Maximum Connections". Right now I set them to really low numbers: the first to 120 and the second to 200, but what are good numbers to fill in there so that it can work well without jamming up the router or use up the network resource of the PC or Mac? Or could it be that the number of files that are "Waiting" is too high, and used up too much resource? (If so, can emule automatically limit the number to 10 or 20 to prevent using too much resource?) (This happened before on Linksys router, Netgear router, and the AT&T U-verse router.)

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• Capabilities of business and SOHO routers

  - by Q8Y

  I'm currently studying for the CCNA certifications (especially for Cisco routers and configuration). I know that business routers provide more features than SOHO routers, the processing speed and RAM can be enough. Assume I need to connect a number of users through a network (accessing internet, share files, printers, ...). I have a high speed connection to the internet and I already applied QoS. How can I find out how many users such a single (SOHO) router could handle? In my case I'd attach to it multiple switches until I have the number of ports needed. Would everything work well and smoothly with 50 users? What about 300? At which point would I need a business router instead? If I implemented VLAN here, would it make any difference in the performance? When do I really need to use more than one router? (Both SOHO and business) I'm thinking that I may need them only if I want to increase the performance (instead of replacing the existing one) and if I have multiple locations, so in this situation I need to have multiple routers, right? Put differently: Is there is a need to have another router if my business all in one place?

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