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Lookup your own IPv4 address

Advanced python tracing
Trace python statement execution and syscalls invoked during that simultaneously

Set audible alarm when an IP address comes online
Waiting for your server to finish rebooting? Issue the command above and you will hear a beep when it comes online. The -i 60 flag tells ping to wait for 60 seconds between ping, putting less strain on your system. Vary it to your need. The -a flag tells ping to include an audible bell in the output when a package is received (that is, when your server comes online).

Find the dates your debian/ubuntu packages were installed.
Find when debian packages were installed on a system.

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"

Get your outgoing IP address

Beep siren
Infinitely plays beeps with sinusoidally changing sound frequency. Ideal for alarm on an event.

Extract all 7zip files in current directory taking filename spaces into account

Trick find -exec option to execute alias
An alias cannot be executed as command in a find -exec line. This form will trick the command line and let you do the job.

Show max lengths of all fields in a pipe delimited file with header row


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