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Converts uppercase chars in a string to lowercase

Rename files in batch

Increment the filename of png in a given directory by one

Change wallpaper for xfce4 >= 4.6.0
Simply changes the wallpaper of xfce4 from the command line. Not for multiple displays.

Prints a file leaving out all blank lines and comment-only lines
Does not print any line that either: - is empty - contains only spaces or tabs - starts with # - starts with spaces/tabs followed by a #

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Print random emoji in terminal
This will print a random emoji within the range of 1F600 - 1F64F, which includes all the face emoji. Obviously, this will only show something meaningful if your terminal can display emoji, but it may be useful in scripts. This likely requires recent versions of bash

Search some text from all files inside a directory

make a log of a terminal session
Creates a log of a session in a file called typescript. Or specify the file with: $script filename Exit the session with control-d.

Lookup your own IPv4 address


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