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Random unsigned integer
works at least in bash. returns integer in range 0-32767. range is not as good, but for lots of cases it's good enough.

Geolocate a given IP address

Share your terminal session real-time
One person does `mkfifo foo; script -f foo' and another can supervise real-time what is being done using `cat foo'.

Dump bash command history of an active shell user.

Find all clients connected to HTTP or HTTPS ports
It finds, specifically, the connections to the HTTP and HTTPS ports as source ports. You can check for destination ports as well.

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"

Find where a kind of file is stored
In this case searches for where .desktop files are stored. The resulted is a sorted list of the top directories containing such files.

Rename files in batch

Timer with sound alarm

Reverse ssh
Both hosts must be running ssh and also the outside host must have a port forwarded to port 22.


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