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Create a random file of a specific size
This will create a 10 MB file named testfile.txt. Change the count parameter to change the size of the file. As one commenter pointed out, yes /dev/random can be used, but the content doesn't matter if you just need a file of a specific size for testing purposes, which is why I used /dev/zero. The file size is what matters, not the content. It's 10 MB either way. "Random" just referred to "any file - content not specific"

My random music player
This is my favorite music player I use in my beloved Linux systems,server or desktop Enjoy :-)

pipe commands from a textfile to a telnet-server with netcat
sends commands specified in $commandfile to the telnet-server specified by $telnetserver. to have newlines in $commandfile interpreted as ENTER, save the file in CR+LF (aka "Windows-Textfile") format. if you want to save the output in a separate file, use: $nc $telnetserver 23 < $commandfile > $resultfile

One liner to kill a process when knowing only the port where the process is running
-k (kill option ) . To kill all processes accessing this port

copy string to clipboard
Copy the current path. Use -selection clipboard to copy the string to clipboard.

MP3 player
I tried a few curses based mp3 players for playing back choir practice songs for my wife. Unfortunately none of the ones I tried were capable of scrubbing a track. Firefox saves the day.

run shell with your commandlinefu.com's favourites as bash_history
This makes your commandlinefu.com's favorites appear as most recent commands in your history.

Alias for lazy tmux create/reattach

Create a directory and change into it at the same time
How often do you make a directory (or series of directories) and then change into it to do whatever? 99% of the time that is what I do. This BASH function 'md' will make the directory path then immediately change to the new directory. By using the 'mkdir -p' switch, the intermediate directories are created as well if they do not exist.

List all PostgreSQL databases. Useful when doing backups


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