Category Archives : Linux


apache unresponsive

apache2 hangs.  Check logs, see: [error] could not make child process 16190 exit, attempting to continue anyway check your php files (such as drupal’s includes/common.inc and sites/all/modules/advagg/advagg.missing.inc ) for: ignore_user_abort Try to comment all out, and restart apache.


apt-get upgrade getting: Err http://security.ubuntu.com raring-security/universe amd64 Packages 404 Not Found [IP: 91.189.91.15 80]

To make apt-get update work, we simply need to edit /etc/apt/sources.list and update all URLs from security.ubuntu.com and archive.ubuntu.com to point to old-releases.ubuntu.com, as per the following sed command: sudo sed -i.bak -r ‘s/(archive|security).ubuntu.com/old-releases.ubuntu.com/g’ /etc/apt/sources.list After this, sudo apt-get update seems to run without a hitch. Of course if you do this, you’re accepting to […]


ssh warning

When ssh, if you get:   @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Someone could be eavesdropping on you right now (man-in-the-middle attack)! It is also possible that a host key has just been changed. The fingerprint for the DSA […]


alt + tab application window switcher (e.g. no grouping of windows) in ubuntu

sudo apt-get install compizconfig-settings-manager sudo apt-get install compiz-plugins Open compizconfig-settings-manager with alt-F2, type ccsm. Scroll down to “Ubuntu Unity Plugin”. Choose the tab “Switcher”. Disable the alt-tab and shift-alt-tab key bindings. (“Key to start the switcher” and “Key to switch to the previous window in the Switcher”. Click the “Back” button. Scroll down to the […]