To control SSH access based on location, I will use the GeoIP free database to determine the source IP address. Each time an external (non-local network) connection is initiated, the script will be executed by the SSH daemon to identify the region. If the region is not in the allowed list the connection will be…
Continue reading →
The following command will mute and unmute the sound alternatively depending on the current setting:
1 | amixer -q -D pulse sset Master toggle |
The command can be assigned to a keyboard key combination using the Keyboard Settings application. The above assumed that PulseAudio is the primary audio system and that alsamixer is installed as well.
Continue reading →
From http://www.cs.utah.edu/~bigler/code/sshkeys.html Generate your key pair (do no enter password when prompted)
1 2 | cd ~/.ssh ssh-keygen -t rsa |
Copy public key to remote server
1 2 3 4 | cat ~/.ssh/id_rsa.pub | ssh user@remote.machine.com 'cat >> .ssh/authorized_keys' # If you need to make a .ssh directory on the remote machine cat ~/.ssh/id_rsa.pub | ssh user@remote.machine.com 'mkdir .ssh; cat >> .ssh/authorized_keys' |
The following will add a Ubuntu repository (PPA) key so that it is trusted by the system.
1 | sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys <key id> |