Terminal commands

1. To see list of recent commands, (in this case 25):

    history 25
   

2. To search for a command in recent commands:

    <CTRL>R
    Type in th
    e start of the command
   

3. To add a directory to PATH add the line to ./bashrc

    export PATH="/path/to/dir:$PATH"
   

4. To run .bashrc to evade logging out:

    source ~/.bashrc
   

To list a program’s dependencies

E.g for rhythmbox

apt-cache depends rhythmbox

To check that a lib is installed

E.g for libgstreamer-plugins-base1.0-0

ldconfig -p | grep libgstreamer-plugins-base1.0-0

If it exists you will see a list of information, if not, nothing is output.

Flip image horizontally (mirror)

ffmpeg -i input.mp4 -vf "transpose=0,transpose=1" output.mp4