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• Gnome 3 application Icons disappeared

  - by robin.koch

  I edited my main menu settings (unchecked items inside a sub menu) when it happened that the window freezed and all entries on the left side disappeared (Office, System, Settings, Games, ...). I didn't think much about it, but when I restarted my computer all application entries in my menu and my favorites (quickstart bar on the left side) where gone. When I go to activities - applications I just see the "All" entry without any items to click on. ~/.config/menu/gnome-applications.menu is an empty file and ~/.config/menu/gnome-settings.menu has the folowing content: <!DOCTYPE Menu PUBLIC '-//freedesktop//DTD Menu 1.0//EN' 'http://standards.freedesktop.org/menu-spec/menu-1.0.dtd'> <Menu> <Name>Desktop</Name> <MergeFile type="parent">/etc/xdg/menus/gnome-settings.menu</MergeFile> </Menu> I also looked into the files under /etc/xdg/menus. They look like template files without any reference to actual installed programs. I assume that due to a bug it deleted all my menu settings. Is there any way to restore at least the default menu? Or are there any other places to look for my old configuration?

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• yum security update - message indicating kernel version not up to date

  - by JMC

  Running yum --security check-update returns this message: Security: kernel-3.x.x-x.63 is an installed security update Security: kernel-3.x.x-x.29 is the currently running version I already ran the yum security update on the kernel, but it looks like it didn't change the version running on the system. What needs to be done to make it run the new kernel? Are there any concerns about why it didn't change during the installation process? The yum log just shows installed for the new kernel no error messages.

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• Do I have a bad SD card?

  - by User1

  I'm trying to copy data from my computer to an SD card. After a few hundred megs, I keep getting the following errors in dmesg: [34542.836192] end_request: I/O error, dev mmcblk0, sector 855936 [34542.836284] FAT: unable to read inode block for updating (i_pos 13694981) [34542.836306] MMC: killing requests for dead queue [34542.836310] end_request: I/O error, dev mmcblk0, sector 9280 [34542.837035] FAT: unable to read inode block for updating (i_pos 148486) [34542.837062] MMC: killing requests for dead queue [34542.837066] end_request: I/O error, dev mmcblk0, sector 1 [34542.837074] FAT: bread failed in fat_clusters_flush [34542.837085] MMC: killing requests for dead queue These were all files I copied from a smaller SD card. I just want to transfer them to my new, larger card for my phone. I tried the same experiment with different files on a different machine and the card failed again. Reading data from the old card went fine. My systems are older and the new SD card is new (16GB Class 4). Could this be that my computers are too old? Is there a definitive test to verify if my SD card is bad?

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• Directory permissions on Ubuntu Server 10.04 LTS

  - by SebastianOpperman

  I have set up a second drive on Ubuntu Server. The directory displays correctly but Windows users cannot write or create files on the directory. I have Samba set up so Windows can access the drives. here is the last bit of my /etc/samba/smb.conf [personeel] path = /media/windows browsable = yes guest ok = yes writable = yes read only = no create mask = 0775 directory mask = 0775 I want the directory to be shared with writable permissions to everyone who can access the Ubuntu Server. I have tried sudo chmod but to no success. Any help would be appreciated

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• How to use the date command

  - by SCNCN2010

  How to use the date command to display, for example, 10-Mar-2010 01:01:53? What's the format string?

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• Block all ports except SSH/HTTP in ipchains and iptables

  - by user198003

  How can I block all ports except ssh (port 22) httpd (port 80) using iptables and iphains?

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• Debian: Unable to mount a second drive as a subdirectory inside of another partition.

  - by jkndrkn

  Hello. I have the following /etc/fstab: # /etc/fstab: static file system information. # # <file system> <mount point> <type> <options> <dump> <pass> proc /proc proc defaults 0 0 /dev/md1 / ext3 defaults,errors=remount-ro 0 1 /dev/md0 /boot ext3 defaults 0 2 /dev/md5 /home ext3 defaults 0 2 /dev/md3 /opt ext3 defaults 0 2 /dev/md6 /tmp ext3 defaults 0 2 /dev/md2 /usr ext3 defaults 0 2 /dev/md4 /var ext3 defaults 0 2 /dev/md7 none swap sw 0 0 /dev/sdc /home/httpd ext3 defaults 0 2 /dev/hda /media/cdrom0 udf,iso9660 user,noauto 0 0 /dev/sdc1 /mnt/usb/backup-1 auto defaults 0 0 I am unable to get /dev/sdc/ to mount at /home/httpd/ on reboot. The /home/httpd/ directory exists. Mounting via mount -t ext3 /dev/sdc /home/httpd works just fine. Mounting via mount -a generates the following error message: mount: you must specify the filesystem type This is, incidentally, the same message that I see while booting. The error message goes away if I comment out the line in fstab starting with /dev/sdc.

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• Open application in background without losing current window focus. Fedora 17, Gnome 3

  - by Ishan

  I'm running a script in the background which loads an image with feh depending on which application is currently in focus. However, whenever the script opens the image, window focus is lost to feh. I was able to circumvent this by using xdotool to switch back to the application that was originally in focus, but this introduces a short annoying period of time where the focus is switched from feh to the application. My question is this: is there any way to launch feh in the background such that window focus is NOT lost? System: Fedora 17, Gnome 3, Bash Thanks a ton!

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• Ubuntu's garbage collection cron job for PHP sessions takes 25 minutes to run, why?

  - by Lamah

  Ubuntu has a cron job set up which looks for and deletes old PHP sessions: # Look for and purge old sessions every 30 minutes 09,39 * * * * root [ -x /usr/lib/php5/maxlifetime ] \ && [ -d /var/lib/php5 ] && find /var/lib/php5/ -depth -mindepth 1 \ -maxdepth 1 -type f -cmin +$(/usr/lib/php5/maxlifetime) ! -execdir \ fuser -s {} 2> /dev/null \; -delete My problem is that this process is taking a very long time to run, with lots of disk IO. Here's my CPU usage graph: The cleanup running is represented by the teal spikes. At the beginning of the period, PHP's cleanup jobs were scheduled at the default 09 and 39 minutes times. At 15:00 I removed the 39 minute time from cron, so a cleanup job twice the size runs half as often (you can see the peaks get twice as wide and half as frequent). Here are the corresponding graphs for IO time: And disk operations: At the peak where there were about 14,000 sessions active, the cleanup can be seen to run for a full 25 minutes, apparently using 100% of one core of the CPU and what seems to be 100% of the disk IO for the entire period. Why is it so resource intensive? An ls of the session directory /var/lib/php5 takes just a fraction of a second. So why does it take a full 25 minutes to trim old sessions? Is there anything I can do to speed this up? The filesystem for this device is currently ext4, running on Ubuntu Precise 12.04 64-bit. EDIT: I suspect that the load is due to the unusual process "fuser" (since I expect a simple rm to be a damn sight faster than the performance I'm seeing). I'm going to remove the use of fuser and see what happens.

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• Vicious net widget and dynamic interface

  - by tdi

  Ive got pretty standard vicious net widget for the eth0, yet this is my laptop and I move a lot, sometimes I use wlan0, sometimes ppp0. Is there a way in vicious to dynamically choose the active iface? netwidget = widget({ type = "textbox" }) -- Register widget vicious.register(netwidget, vicious.widgets.net, '<span color="' .. beautiful.fg_netdn_widget ..'">${eth0 down_kb}</span> <span color="' .. beautiful.fg_netup_widget ..'">${eth0 up_kb}</span>', 3)

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• query keepalived

  - by tdimmig

  *Note: I have trouble deciding what should go in serverfault and what should go in superuser, if some kindly admin decides this is in the wrong place please move it for me - many thanks. I am implementing a basic HA system with keepalived. I only want to be notified of the failover in the case of hardware failure. I do, however, have the servers switch roles periodically. I have a track_script running on the backup that will vary it's return between 0 and 1 on an interval (once a week, once a month, whatever). Upon returning 0, the priority is raised above that of the master, upon returning 1 the priority is lowered again. This way they trade places on the configured interval. The question: What can I do to tell the difference between a switch caused by my script, and a switch caused because one of the servers died? I certainly want to be notified when there is an actual problem, but not every time the servers change places because of the script. I see that version 1.2.7 has snmp support and I may be able to use it to get some information that could tell me one way or another, but to be honest I've never used snmp before and I don't know how to get the information I want with it (my Google foo failed me).

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• Apache HTTP Not Working When SSL Enabled

  - by dominic7il

  I've got a very bizarre problem in that after enabling SSL support in Apache I'm only able to access my site via SSL and not through http as well. I can confirm that Apache is definitely listening on both ports 80 and 443 (accdording to netstat). Additionally the Apache access logs are showing the requests - it's just that going in through http results in a timeout and I'm never actually able to reach the content. Like I said going through https works. Here is my httpd.conf: http://pastebin.com/kG2dPjJ2 and here is my httpd-ssl.conf: http://pastebin.com/thqvjgGJ Can anyone spot any issues with those configurations? or Have any suggestion at all? I've searched and searched but there appear to be very few people who have experienced the same. Also worth mentioning that I did a comparision between those configurations and those of a working set up and I couldn't spot anything.

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• How can I make zsh completion behave like Bash completion?

  - by Nate

  I switched to zsh, but I dislike the completion. If I have 20 files, each with a shared prefix, on pressing tab, zsh will fully complete the first file, then continue going through the list with each press of tab. If I want one near the end, I would have to press tab many times. In bash, this was simple - press tab and I would get the prefix. If I continued typing (and pressing tab), bash would complete as far as it could be certain of. I find this behavior to be much more intuitive but prefer the other features of zsh to bash. Is there a way to get this style of completion? Google suggested setopt bash_autolist, but this had no effect for me (and no error message was printed upon starting my shell). Thanks.

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• How do I minimize Evolution to the system tray in Ubuntu?

  - by Jephir

  In Ubuntu some applications can be set to minimize instead of exit on close. For example, Empathy minimizes to the system tray (mail icon) when the close button is pressed in the application window. How do I make Evolution do this as well? Essentially I would like to have Evolution hidden in the system tray instead of having to re-launch it every ten minutes to check for new messages (or leave it open and clutter the taskbar).

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• What sysadmin must do to run OS with damaged /lib/libc.so file ? / rsyslogd daemon logrotation / deny checking list of running processes

  - by Virtual_Lotos

  What sysadmin must do to run OS with damaged /lib/libc.so file ? In other words, how command interpreter should be configured to be able to run system with corrupted /lib/libc.so file ? Do I have to move it to /var catalog ? Does the command interpreter must be statically compiled or have setuid attribute or perhaps must be a symbolic link to /bin/sh or must be no larger than 2MB ? How to prevent a user from checking list of processes started by another user ? How do I forbid a user to see which processes are running by another user ? What do I have to keep in mind when I want to make rsyslogd daemon logrotation ?

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• Should we regularly schedule mysqlcheck (or databsae optimization)

  - by scatteredbomb

  We run a forum with some 2 million posts and I've noticed that if left untouched the overhead in the mySQL (as listed in phpMyAdmin) can get quite large (hundreds of megabytes). I'm wondering if scheduling a normal mysqlcheck to optimize the tables is good practice? Any reason not to do it, say, once a week at an off-peak hour? There was a time over the summer where our site was constantly crashing because mysql was using up all resources. That's when I noticed the huge amount of overhead and optimized the database and haven't had any problems since then with stability. I figured if that was helping alleviate the issues, I should just setup a cron to automatically do this.

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• How to find the reason for a weekly downtime on an Ubuntu web server hosted by AWS?

  - by IceSheep

  We started monitoring our web server using Pingdom and found out that we have a downtime of a few minutes every Sunday at 0:00 UTC. The test runs every minute and checks if a successful HTTP response (code 200) is returned on port 80. The test fails due to a timeout (no response after 30 seconds). Here's what we've already checked – without success: Since we run our webserver behind a load balancer, I've set the Pingdom test on the load balancer's public DNS and the webserver's public DNS in order to find out if there's a problem with the AWS load balancer – both tests return the same result We set up Munin on our webserver. Everything looked fine even after the failure. Since the last failure lasted only 2 minutes I suppose Munin couldn't capture a potential problem (it only checks every 5 minutes) I have checked /var/log/apache2/error.log and /var/log/syslog for suspicious entries I have checked /etc/cron.weekly and /etc/crontab for suspicious entries I have searched for files created or last-modified during 0:00 and 0:15 using this method: touch -t 201209020000 start touch -t 201209020015 end find / -newer start -and ! -newer end (nothing found) Has anybody experienced a similar problem? Any proposals on how to find the reason for this behavior? It's Ubuntu 10.04 LTS running on an AWS m1.large instance. Thanks!

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• How to change log rotate Extension..???

  - by Jayakrishnan T

  Hi all, currently my logrotate configuration adds a single number after the rotated log file: mylogfile.log is rotated to mylogfile.log.1 I would like to change the extension to mylogfile.log.Current date does anyone know a way to do this? my log rotate code is :- /usr/local/jboss/jboss-3.2.7-ND1/server/default/log/consolelog.log { copytruncate rotate 1 missingok notifempty } Currently am renaming the rotated file with script.is there any option to change the extension of log rotate default configuration. Please help me

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• What do these acronyms stand for ?

  - by Luc M

  Some directories are easy to understand the meaning /usr /bin ... But for the next ones, I have no idea. /etc /opt opt for optionnal ? etc for electronic t...... configuration (no idea for t) I would like to know what these acronyms are meaning

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• Hard Reset USB in Ubuntu 10.04

  - by Cory

  I have a USB device (a modem) that is really finicky. Sometimes it works fine, but other times it refuses to connect. The only solution I have found to fix it once it gets into a bad state is to physically unplug the device and plug it back in. However, I don't always have physical access to the machine it is plugged in on, so I'm looking for a way to do this through the command line. This post suggests running: $ sudo modprobe -w -r usb_storage; sudo modprobe usb_storage However I get an "unknown option -w" output. This slightly modified command: $ sudo modprobe -r usb_storage Fails with the message FATAL: Module usb_storage is in use. If I try to kill -9 the processes marked [usb-storage] before running they refuse to die (I think because they are deeply tied to the kernel). Anyone know of a way to do this? NOTE: I cross-posted this on serverfault as I didn't know which was more appropriate. I will delete and/or link whichever one is answered first.

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• route command not being executed in rc.local

  - by user1265478

  I tried adding route add -net 224.0.0.0 netmask 240.0.0.0 dev eth0 to my Fedora rc.local file, but it's not being executed when Fedora boots up. What can I do to fix this? update: i changed to the full path cmd in my rc.local /sbin/route add -net 224.0.0.0 netmask 240.0.0.0 dev eth0 but its not being executed. I change it to sudo /sbin/route add -net 224.0.0.0 netmask 240.0.0.0 dev eth0 it still doesnt work although it works when i manually enter it in the terminal.

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• Ping not working

  - by Nishant

  Ping is not working to and from this IP to my computer. inet addr:10.125.104.4 Bcast:10.125.111.255 Mask:255.255.240.0 My computer is like this Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : IP Address. . . . . . . . . . . . : 10.125.65.75 Subnet Mask . . . . . . . . . . . : 255.255.252.0 Default Gateway . . . . . . . . . : 10.125.64.6 We both CAN reach the common gateway IP , 10.125.96.6 . What should I check ? What is the barrier in sending info if we both have a common gateway that is pingable ? Besides I can login to a intermediate server and ssh to this server also !!

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• How do I set it so that everyone uses the /bin/bash shell ?

  - by Alex

  It doesn't seem to work for some reason if I do this in /etc/profile: export SHELL="/bin/bash/"

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• Port forwarding using IP Tables

  - by Darider

  I have a server with a LAN facing address of 192.168.5.100 (eth0) and another LAN facing address of 192.168.6.6 (eth1). On this server I have a Virtualbox instance of fedora running an apache webserver (on port 8080) with a bridged interface to eth1 on the host server with address of 192.168.6.7 Users on the 192.168.6.x network can access the Webserver on the Vbox instance (192.168.6.7) with no problems. My question is what kind of iptables entries or commands should be made/executed so as to allow for users on the 192.168.5.x network to access the webserver on the vbox instance. (I'm hoping their url can be something like: http://192.168.5.100:8080)

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• What could be causing LVM errors on first boot after install in Debian?

  - by ianfuture

  Hi, I've installed Debian (lenny) on a machine at home. It was set up during install to have a /boot partition, then the rest was encrypted, then had an LVM ontop of that, then all the other partitons inside LVM. After install completed and on first boot it asked for password to un-encrypt(same password for both drives) then it showed an error which said LVM could not find a physical device with a particular UUID or something similar. LVM install is over two HDs. One is 120GB and one 40GB. 120GB is Master on its IDE cable and this has /boot on it. 40GB is slave on the other IDE cable. Is there anything that could be done to rescue this install? Or diagnose problem? It took ages to get installed due to time spent enrypting drives and I'd rather not go through that again. :( Thanks.. Ian

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