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  • What can inexperienced admin expect after server setup completed seemingly fine? [closed]

    - by Miloshio
    Inexperienced person seems to have done everything fine so far. This is his very first time that he is the only one in charge for LAMP server. He has installed OS, network, Apache, PHP, MySQL, Proftpd, MTA & MDA software, configured VirtualHosts properly (facts because he calls himself admin), done user management and various configuration settings with respect to security recommendations and... everything is fine for now... For now. If you were directing horror movie for server admin above mentioned what would you make up for boogieman that showed up and started to pursue him? Omitting hardware disaster cases for which one cannot do anything 'from remote', what is the most common causes of server or part-of-server or server-related significant failure when managed by inexperienced admin? I have in mind something that is newbie admins very often missing which is leading to later intervention of someone with experience? May that be some uncontrolled CPU-eating leftover process, memory-related glitch, widely-used feature that messes up something unexpected on anything like that? Newbie admin for now only monitors disk-space and RAM usage, and number of running processes. He would appreciate any tips regarding what's probably going to happen to his server over time.

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  • Can't unlock locked screen, in Ubuntu 12

    - by Camille Goudeseune
    After locking the screen (with a keystroke bound to xlock -nice 8 -mode blank), I can unlock the screen as expected, but only within a few minutes. After being locked overnight, when I hit a key (even Ctrl+Alt combos), the screen stays black with just a brief white flash across the middle of both monitors. The workaround is to ssh in from another host and restart X. Some months ago, this happened every few weeks. By now it happens almost every morning. How do I even start to diagnose this? What might I look for in log files? (The intermittency is particularly troubling.) Failing that, is there an alternative to xlock aka xlockmore? Hardware: 3-year-old HP minitower, GEForce 9800 GT, two Asus LCD monitors. Software: Ubuntu 12.04.2 LTS. Window manager awesome-wm. NVidia driver 304.88. XLock version xlockmore-5.31.

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  • Can't ping Ip over bridge

    - by tmn29a
    I'm unable to ping another host over a bridge I created, I can't see the error -.- It's a remote machine running debian stable with some backports for which I want to set up DHCP on the new Subnet 172.30.xxx.xxx to be used for KVM-Guests. ifconfig : bond0 Link encap:Ethernet HWaddr e4:11:5b:d4:94:30 inet addr:10.54.2.84 Bcast:10.54.2.127 Mask:255.255.255.192 inet6 addr: fe80::e611:5bff:fed4:9430/64 Scope:Link UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1 RX packets:34277 errors:0 dropped:0 overruns:0 frame:0 TX packets:18379 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:2638709 (2.5 MiB) TX bytes:2887894 (2.7 MiB) br0 Link encap:Ethernet HWaddr f2:fc:4d:7f:15:f0 inet addr:172.30.254.66 Bcast:172.30.254.127 Mask:255.255.255.192 inet6 addr: fe80::f0fc:4dff:fe7f:15f0/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:252 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 B) TX bytes:10800 (10.5 KiB) Pings : ping -I br0 172.30.xxx.65 PING 172.30.xxx.65 (172.30.xxx.65) from 172.30.xxx.66 br0: 56(84) bytes of data. --- 172.30.xxx.65 ping statistics --- 3 packets transmitted, 0 received, 100% packet loss, time 2017ms ping -I bond0 172.30.254.65 PING 172.30.xxx.65 (172.30.xxx.65) from 10.54.2.84 bond0: 56(84) bytes of data. 64 bytes from 172.30.x.65: icmp_req=1 ttl=64 time=0.599 ms 64 bytes from 172.30.x.65: icmp_req=2 ttl=64 time=0.575 ms 64 bytes from 172.30.x.65: icmp_req=3 ttl=64 time=0.565 ms --- 172.30.x.65 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 1999ms rtt min/avg/max/mdev = 0.565/0.579/0.599/0.031 ms Route : Destination Gateway Genmask Flags Metric Ref Use Iface 172.30.x.64 * 255.255.255.192 U 0 0 0 br0 10.54.x.64 * 255.255.255.192 U 0 0 0 bond0 default 10.54.x.65 0.0.0.0 UG 0 0 0 bond0 default 172.30.x.65 0.0.0.0 UG 0 0 0 br0 The Interface : cat /etc/network/interfaces auto lo br0 iface lo inet loopback # Bonding Interface auto bond0 iface bond0 inet static address 10.54.x.84 netmask 255.255.255.192 network 10.54.x.64 gateway 10.54.x.65 slaves eth0 eth1 bond_mode active-backup bond_miimon 100 bond_downdelay 200 bond_updelay 200 iface br0 inet static bridge_ports bond0 address 172.30.x.66 broadcast 172.30.x.127 netmask 255.255.x.192 gateway 172.30.x.65 bridge_maxwait 0 If you need more info please ask. Thanks for your help !

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  • Verify that a cron job has completed

    - by skylarking
    Is there a command that can be run to verify that a users cron job has run successfully? Platform is Ubuntu 8.04 LTS. I have scripts in /home/useraccount/bin/ running crontab -l while logged in as user results in: # m h dom mon dow command @hourly /home/useraccount/bin/script_1 @hourly /home/locateruser/bin/script_2 I realize scripts could send email or write to a log with a timestamp, but wondering if there is just a way to verify it ran from the command line.

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  • What music streaming app fits my needs on Ubuntu?

    - by Jim
    I'm looking for an application to stream Internet radio on Ubuntu. I like listening to Radio Paradise while I work. Right now, I'm using Amarok. "Movie Player" sometimes refuses to open the stream, and VLC doesn't keep its window title updated with the currently playing track. Amarok has nice translucent notifications when tracks change, but track changes in streams don't trigger the notifications. Mostly, I want something that reliably opens streams and makes it easy to see the name of the track that's playing. If it has a built-in directory of streaming radio stations, that would be a big benefit.

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  • Apache intermittently aborting requests

    - by Adam Phillips
    I have just been dealing with a problem whereby http requests are being aborted, seemingly at random. On any particular page in the website, when you opened a page, a number of the assets (img, css, etc) failed to load. If you refreshed, the page may work fine, the same set of assets may fail to load or different assets may fail to load. The net tab in firefox was returning 'Aborted' in the HTTP status code column for the failed assets, even tho in the case of images, the image previews were still working. There was nothing in any of the apache logs about the requests that failed, however since it seemed to point to an apache issue, we restarted apache. The first time we tried, it made no difference but about 10 minutes later, in the absence of a better solution we tried again. Bizarrely, the problem disappeared immeadiately. So now the site seems to be running fine again but its rather unsettling, both the intermittent nature of the problem and the lack of an explanation for its resolution. Has anyone seen anything like this before and if so did you find out the reason behind it? Many Thanks

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  • sudoer scheme to allow useful access to another web developer yet retain future control of a virtual

    - by Tchalvak
    Background: Virtual Private Server I have a virtual private server that I'm looking to host multiple websites on, and provide access to another web developer. I don't care about putting too many constraints on him, though I wouldn't mind isolating the site that he'll be developing from other sites on the server that I will develop. The problem: retain control Mainly what I want is to make sure that I retain control over the server in the future. I want to reserve the ability to create/promote/demote and other administrative functions that don't deal with web software. If I make him an admin, he can sudo su - and become root and remove root control from me, for example. I need him not to be able to: take away other admin permissions change the root password have control over other security/administrative functions I would like him to still be able to: install software (through apt-get) restart apache access mysql configure mysql/apache reboot edit web development configuration type files in /etc/ Other Standard Setups would be happily considered I've never really set up a good sudoers file, so simple example setups would be very useful, even if they're only somewhat similar to the settings that I'm hoping for above. Edit: I have not yet finalized permissions, so standard, useful sudo setups are certainly an option, the lists above are more what I'm hoping I can do, I don't know that that setup can be done. I'm sure that people have solved this type of problem before somehow, though, and I'd like to go with something somewhat tested as opposed to something I've homegrown.

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  • monitor power and lock screen (Ubuntu Lucid)

    - by xsznix
    Hi, I'm trying to get my screen to turn off whenever I lock my screen. I know that in Power Management, there's an option to turn off the screen after a set amount of time, and I know about xset dpms force off, but the former doesn't allow me to turn off the screen from the logout menu, and the latter only turns the screen off for a short amount of time (1 minute or so. The screen just turns back on by itself). Is there a script I can modify to change what happens when "Lock screen" from the logout menu is selected, or is there a script I can add to the panel to lock the screen and then turn the monitor off (and turning it back on when I shake the mouse or something)? Thanks.

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  • Ubunt doesn't mount one of my NTFS disks

    - by Jader Dias
    There is a mountable /dev/sda NTFS formatted (Windows disk) There is no /dev/sdb when I ls /dev (NTFS Data disk) There is a /dev/sdc which is another disk of the same model, (Ubuntu disk) I can see that Ubuntu detected this unmountable disk in the Disk Utility It states incorrectly it is unpartioned and a RAID volume. (it previously was RAID0 setup with /dev/sdc but now it is a simple volume, no RAID whatsoever) When I boot Windows 7, it uses this unmountable disk without a glitch The problem happens in both IDE and AHCI modes Ubuntu 10.04 Lucid Lynx

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  • why page is automatically redirecting to some other sites

    - by raj
    In my browser (Firefox 10.0.7) the page is automatically redirect to some other sites without clicking any link. If I enter the superuser.com url after pressing Enter button, It redirect to some other sites. sometimes while refreshing also the page is redirect to some other site. It's redirecting to this sites http://result.seenfind.com/ncp/Default.aspx?term=gatlinburg%20cabin&u=1000670913 http://search.cpvee.com/search.php?q=gatlinburg+cabin&y=&f=2168&s= http://www.insidecelebritygossip.com/ I cleared all history and all but still same problem. I am using CentOS 6.3

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  • Rpm removal does not remove delivered dirs and leaves garbage

    - by Jim
    I deliver an application via an RPM. This application delivers various directories and files. E.g. under /opt/internal/com a file structure is being copied. I was expecting that on rpm -e all the file structure delivered under /opt/internal/com will be removed. But it does not. There are directories in the file structure that are non-empty. Is this the reason? But these (non-empty) directories were created by the RPM installation. So I would expect that they would be "owned" by RPM and removed automatically. Is this wrong? Am I supposed to remove them manually?

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  • Access Derby for CDP Server

    - by Skudd
    I am working on a project that requires accessing the Derby database behind a CDP Backup Server. From what limited research I've been able to complete, I have found that it is possible to access Derby databases over TCP, but I'm at a complete loss for this. I'm looking to connect via PHP eventually, but first I need to know if this is at all possible with an out-of-the-box CDP server. Answers are, as always, appreciated. Thanks!

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  • Creating a link to name changing directory

    - by groove1534
    I have an Ubuntu 12.04 installed using wubi + Win7. I'm trying to create a link to "my documents" directory which located in my C drive: C:\Users\Myuser\My Documents\ Since the Ubuntu is installed in D:\, which is the "host", my C drive is accessible via /media/some_changing_hex. This hex get changed each time I restart my machine. So I need, somehow, to create a link that uses regex OR a link that somehow gets the the first (in this case - only) subdirectory in /media (something like all_subdirectories[0]). So how do I do that?

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  • /var/tmp and file lifetime

    - by clorz
    Hi everyone I've got a cronjob that runs every minute and checks existence of a certain file. If there's no such file, job silently ends. If there is a file, then another script is started. That script removes the file when done. Its execution time can take up to 20 minutes. My questions are: Are there any flaws in this scheme? Is it ok to store such file in tmp? Can I be shure that nothing will attempt to remove it?

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  • What does directory permission 'S' mean? (not lower case, but in upper case)

    - by Howard Guo
    I downloaded Eclipse, uncompressed it, did a few other things and all sudden I notice this interesting behaviour: ^_^ ~/Downloads > sudo chmod 0000 eclipse/ ^_^ ~/Downloads > stat eclipse/ File: 'eclipse/' Size: 4096 Blocks: 8 IO Block: 4096 directory Device: 801h/2049d Inode: 529725 Links: 9 Access: (2000/d-----S---) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2012-11-22 19:54:57.752017352 +1100 Modify: 2012-09-20 18:16:26.000000000 +1000 Change: 2012-11-22 20:07:49.354016510 +1100 Birth: - ^_^ ~/Downloads > sudo chmod 0755 eclipse/ ^_^ ~/Downloads > stat eclipse/ File: 'eclipse/' Size: 4096 Blocks: 8 IO Block: 4096 directory Device: 801h/2049d Inode: 529725 Links: 9 Access: (2755/drwxr-sr-x) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2012-11-22 19:54:57.752017352 +1100 Modify: 2012-09-20 18:16:26.000000000 +1000 Change: 2012-11-22 20:08:19.042016478 +1100 Birth: - What does 'S' permission mean to a directory? And why it doesn't let me get rid of it? Thanks.

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  • IPTables configuration help

    - by Sam
    I'm after some help with setting up IPTables. Mostly the configuration is working, but regardless of what I try I cannot allow localhost to access the local Apache only (i.e. localhost to access localhost:80 only). Here is my script: !/bin/bash Allow root to access external web and ftp iptables -t filter -A OUTPUT -p tcp --dport 21 --match owner --uid-owner 0 -j ACCEPT iptables -t filter -A OUTPUT -p tcp --dport 80 --match owner --uid-owner 0 -j ACCEPT Allow DNS queries iptables -A OUTPUT -p udp --dport 53 -j ACCEPT iptables -A OUTPUT -p tcp --dport 53 -j ACCEPT Allow in and outbound SSH to/from any server iptables -A INPUT -p tcp -s 0/0 --dport 22 -j ACCEPT iptables -A OUTPUT -p tcp -d 0/0 --sport 22 -j ACCEPT Accept ICMP requests iptables -A INPUT -p icmp -s 0/0 -j ACCEPT iptables -A OUTPUT -p icmp -d 0/0 -j ACCEPT Accept connections from any local machines but disallow localhost access to networked machines iptables -A INPUT -s 10.0.1.0/24 -j ACCEPT iptables -A OUTPUT -d 10.0.1.0/24 -j DROP Drop ALL other traffic iptables -A OUTPUT -p tcp -d 0/0 -j DROP iptables -A OUTPUT -p udp -d 0/0 -j DROP Now I have tried many permutations and I'm obviously missing everything. I place them above the in/out bound SSH to/from, so it's not the precedence order. If someone could give me the heads up on allowing only the local machine to access the local web server, that'd be great. Cheers guys.

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  • How to mount a iSCSI/SAN storage drive to a stable device name (one that can't change on re-connect)?

    - by jcalfee314
    We need stable device paths for our Twinstrata SAN drives. Many guides for setting up iSCSI connectors simply say to use a device path like /dev/sda or /dev/sdb. This is far from correct, I doubt that any setup exists that would be happy to have its device name suddenly change (from /dev/sda to /dev/sdb for example). The fix I found was to install multipath and start a multipathd on boot which then provides a stable mapping between the storage's WWID to a device path like this /dev/mapper/firebird_database. This is a method described in the CentOS/RedHat here: http://www.centos.org/docs/5/html/5.1/DM_Multipath/setup_procedure.html. This seems a little complicated though. We noticed that it is common to see UUIDs appear in fstab on new installs. So, the question is, why do we need an external program (multipathd) running to provide a stable device mount? Should there be a way to provide the WWID directly in /etc/fstab?

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  • I can connect to Samba server but cannot access shares.

    - by jlego
    I'm having trouble getting samba sharing working to access shares. I have setup a stand-alone box running Fedora 16 to use as a file-sharing and web development server. It needs to be able to share files with a Windows 7 PC and a Mac running OSX Snow Leopard. I've setup Samba using the Samba configuration GUI tool on Fedora. Added users to Fedora and connected them as Samba users (which are the same as the Windows and Mac usernames and passwords). The workgroup name is the same as the Windows workgroup. Authentication is set to User. I've allowed Samba and Samba client through the firewall and set the ethernet to a trusted port in the firewall. Both the Windows and Mac machines can connect to the server and view the shares, however when trying to access the shares, Windows throws error: 0x80070035 " Windows cannot access \\SERVERNAME\ShareName." Windows user is not prompted for a username or password when accessing the server (found under "Network Places"). This also happens when connecting with the IP rather than the server name. The Mac can also connect to the server and see the shares but when choosing a share gives the error: The original item for ShareName cannot be found. When connecting via IP, the Mac user is prompted for username and password, which when authenticated gives a list of shares, however when choosing a share to connect to, the error is displayed and the user cannot access the share. Since both machines are acting similarly when trying to access the shares, I assume it is an issue with how Samba is configured. smb.conf: [global] workgroup = workgroup server string = Server log file = /var/log/samba/log.%m max log size = 50 security = user load printers = yes cups options = raw printcap name = lpstat printing = cups [homes] comment = Home Directories browseable = no writable = yes [printers] comment = All Printers path = /var/spool/samba browseable = yes printable = yes [FileServ] comment = FileShare path = /media/FileServ read only = no browseable = yes valid users = user1, user2 [webdev] comment = Web development path = /var/www/html/webdev read only = no browseable = yes valid users = user1 How do I get samba sharing working? UPDATE: I Figured it out, it was because I was sharing a second hard drive. See checked answer below. Speculation 1: Before this box I had another box with the same version of fedora installed (16) and samba working for these same computers. I started up the old machine and copied the smb.conf file from the old machine to the new one (editing the share definitions for the new shares of course) and I still get the same errors on both client machines. The only difference in environment is the hardware and the router. On the old machine the router received a dynamic public IP and assigned dynamic private IPs to each device on the network while the new machine is connected to a router that has a static public IP (still dynamic internal IPs though.) Could either one of these be affecting Samba? Speculation 2: As the directory I am trying to share is actually an entire internal disk, I have tried these things: 1.) changing the owner of the mounted disk from root to my user (which is the same username as on the Windows machine) 2.) made a share that only included one of the folders on the disk instead of the entire disk with my user again as the owner. Both tests failed giving me the same errors regarding the network address. Speculation 3: Whenever I try to connect to the share on the Windows 7 client I am prompted for my username and password. When I enter the correct credentials I get an access denied message. However I did notice that under the login box "domain: WINDOWS-PC-NAME" is listed. I believe this could very well be the problem. Speculation 4: So I've completely reinstalled Fedora and Samba now. I've created a share on the first harddrive (one fedora is installed on) and I can access that fine from Windows. However when I try to share any data on the second disk, I am receiving the same error. This I believe is the problem. I think I need to change some things in fstab or fdisk or something. Speculation 5: So in fstab I mapped the drive to automount in a folder which works correctly. I also added the samba_share_t SElinux label to the mountpoint directory which now allows me to access the shares on the Windows machine, however I cannot see any of the files in the directory on the windows machine. (They are there, I can see them in the fedora file browser locally)

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  • How to setup IP alias on bridged interface in Ubuntu

    - by Anonymouslemming
    How do I setup an IP alias on a bridge (br0) device on Ubuntu ? If I wait for br0 to come up and then do /sbin/ifconfig br0:0 192.168.10.1 netmask 255.255.255.0 then it works fine. If however I add the following to my /etc/network/interfaces file, it does not work and the network fails to start: auto br0:0 iface br0:0 inet static address 192.168.10.1 netmask 255.255.255.0 At the moment, I have a script in /etc/network/if-up.d/bridge_alias that does this as follows: #!/bin/bash if [ "${LOGICAL}" == "br0" ] && [ "${PHASE}" = "post-up" ]; then echo -n "Starting br0:0 ... " /sbin/ifconfig br0:0 192.168.10.2 netmask 255.255.255.0 echo "Done!" fi What is the right way of doing this though, just using the OS network config files ?

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  • rsync not writing files

    - by Cyrcle
    I'm trying to setup rsync to backup a remote directory to my local drive. I cd to the directory that I want to pull the files to, then I enter: rsync -vrtW [email protected]:~/public_html I enter the password then it starts running. I get all the files listed, but none of them actually transfer. What am I missing? Thanks

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  • Virtualhost one https site, the rest http

    - by RJP1
    I have a linode server with Apache2 running a handful of sites with virtualhosting. All sites work fine on port 80, but one site has a ssl certificate and also runs okay. My problem is as follows: The non-https sites, if visiting https://domain.com - show the contents of the only secure site... Is there a way of disabling the *:443 match for these non-secure sites? Thanks! EDIT (more information): Here's a typical config in sites-available for a normal insecure http site: <VirtualHost *:80> ServerName www.insecure.com ServerAlias insecure.com ... </VirtualHost> The secure https site is as follows: <VirtualHost *:80> ServerName www.secure.com Redirect permanent / https://secure.com/ </VirtualHost> <VirtualHost *:80> ServerName secure.com RedirectMatch permanent ^/(.*) https://secure.com/$1 </VirtualHost> <VirtualHost *:443> SSLEngine on SSLProtocol all SSLCertificateChainFile ... SSLCertificateFile ... SSLCertificateKeyFile ... SSLCACertificateFile ... ServerName secure.com ServerAlias secure.com ... </VirtualHost> So, visiting: http:/insecure.com - works http:/www.insecure.com - works http:/secure.com - redirects to https:/secure.com - works http:/www.secure.com - redirects to https:/secure.com - works https:/insecure.com - shows https:/secure.com - WRONG!

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  • How to Exclude an URL for Apache Mod_proxy?

    - by Mughil
    We have two Apache server as front-end and 4 tomcat server as back-end configured using mod_proxy module as load balancer. Now, we want to exclude an single tomcat url from the mod_proxy load balancer. Is there any way or rule to exclude? Proxy Balancer Setting: <Proxy balancer://backend-cluster1> BalancerMember http://10.0.0.1:8080 loadfactor=1 route=test1 retry=10 BalancerMember http://10.0.0.2:8080 loadfactor=1 route=test2 retry=10 </Proxy>

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  • Problem installing CanonMF5880dn

    - by Paul
    Just got a CanonMF5880dn and cannot print to it from Suse 11.1 MacBook prints w/o issue ping 192.168.1.103 no problem cups sees it as Canon MF5880/MF5840 PCL at URI socket://192.168.1.103:9100 cups test print appears to submit and complete job but no action from printer Yast also seems to install printer correctly CQue2 also seems to install printer correctly all attempts to print yield same results: Suse indicates job processed correctly and completely but no printing happens. firewall is off http://192.168.1.103 in FF gives me the printer config menus correctly What have I failed to do?

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  • Enter response once prompt returns?

    - by mjb
    It's neither a secure idea nor one I'd recommend elsewhere, but I have a situation when occasionally it takes a while for my Ansible ad-hoc command to respond. I'd love to pipe or args or whatever is needed to push the required text into the prompt so I can walk away and know it will finish. Ex: $ ansible all -m shell -a "reboot" --ask-pass Password: blah blah blah it worked I'd love to send an argument or << or something to get the password in. Is that possible?

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