Commands by elilindner (0)

  • bash: commands not found

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List all symbolic links in current directory
why go through the hard way? use find with -type l

Vectorize xkcd strips
Uses ImageMagick and potrace to vectorize the input image, with parameters optimized for xkcd-like pictures.

Gets the X11 Screen resolution
Requires xrandr, grep and, sed.

Perform a branching conditional
This will perform one of two blocks of code, depending on the condition of the first. Essentially is a bash terniary operator. To tell if a machine is up: $ ping -c1 machine { echo succes;} || { echo failed; } Because of the bash { } block operators, you can have multiple commands $ ping -c1 machine && { echo success;log-timestamp.sh }|| { echo failed; email-admin.sh; } Tips: Remember, the { } operators are treated by bash as a reserved word: as such, they need a space on either side. If you have a command that can fail at the end of the true block, consider ending said block with 'false' to prevent accidental execution

Replace spaces in a file with hyphens

Find broken symlinks
This is much safer than using -L, because it will not follow links that point to places outside the target directory subtree (CWD, in this case). See here for explanation: http://unix.stackexchange.com/a/38691/9382

Virtual Console lock program
vlock command locks the current console by default. Also you can lock all the consoles on the server by using -a parameter. For details, pl man vlock. ps: Generally speaking , system will not install vlock programme . So you should use ' $ sudo apt-get install vlock ' to install vlock .

Selecting a random file/folder of a folder
Also looks in subfolders

remove oprhan package on debian based system

Cut flv video from minute 19 to minute 20 using flvtool2
We should calculate the video duration to milliseconds, 1 minute = 60000 milliseconds


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