Find the list of installed packages in Ubuntu/Debian
To find the list of installed packages on ubuntu/debian, on console run <pre>dpkg --get-selections</pre> To find if a specific package is installed ...
Category: Notes
Temporarily enable SSH password authentication on RHEL/Centos VMs.
To enable password based authentication on RHEL/Centos machines, login as root to the target host. ( sudo the commands below if you are not logging in as root) ...
Public key authentication not working on RHEL/CentOS
Problem: SSH asks for password even after updating the .ssh/authorized_keys in target host with user’s public key. Reason: A permission issue Fix: Login w...
Fix Vim editor on Ubuntu
Problem: The arrow keys insert characters, no status message at the bottom etc. Reason : The default Vim on Ubuntu is vim-tiny, a skeleton version. Fix: Install...
Eclipse Compilation error: [function/type] is not accessible due to restriction on required library … rt.jar
Problem : Eclipse gives the error – “[function/type] is not accessible due to restriction on required library … rt.jar” when building a ...
Ubuntu Error: Unable to lock the administration directory (/var/lib/dpkg/)
Problem: Ubuntu gives error “Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?” when using apt-get. Reason:...
Create Shortcut / launcher on Desktop in Ubuntu 12.04
To create a shortcut to an application or location on the desktop (Ubuntu 12+), on terminal run – Method 1: Installing Gnome Panel if a shortcut is being ...
Add a folder to left side pane of Nautilus file manager in Ubuntu
To add a folder to favorites in left tab of nautilus – Go the required folder. On title bar (at the top of desktop), go to and click Bookmarks => Add B...
Ubuntu – Unable to resolve host error after a VPN session
Problem: Ubuntu unable to resolve hosts after a disrupted VPN session. Reason: The DNS server not reset to normal from that of the VPN network. Fix: On terminal...
Override certificate error in Cisco AnyConnect Client on Ubuntu 12.04 64 bit
Problem: Cisco Anyconnect client does not give an option to override the “invalid certificate error” and go ahead using the current certificate of t...