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txt2regex can be interactive or noninteractive and generates regular expressions for a variety of dialects based on user input. In interactive mode, the regex string builds as you select menu options. The sample output here is from noninteractive mode, try running it standalone and see for yourself. It's written in bash and is available as the 'txt2regex' package at least under debian/ubuntu.
You need to have fortune and cowsay installed. It uses a subshell to list cow files in you cow directory (this folder is default for debian based systems, others might use another folder).
you can add it to your .bashrc file to have it great you with something interesting every time you start a new session.
A null operation with the name 'comment', allowing comments to be written to HISTFILE. Prepending '#' to a command will *not* write the command to the history file, although it will be available for the current session, thus '#' is not useful for keeping track of comments past the current session.
Installs pip packages defining a proxy
you can put almost any command.
$notify-send -t 0 "MOTD" "$(sed -n '/#^4/,/#$4/{/#^4\|#$4/!p}' motd2 | cut -d# -f2)"
$notify-send -t 0 "readfile" "$(while read mess; do echo $mess;done < motd2)"
If are a Bash user and you are in a directory and need to go else where for a while but don't want to lose where you were, use pushd instead of cd.
cd /home/complicated/path/.I/dont/want/to/forget
pushd /tmp
cd thing/in/tmp
popd (returns you to /home/complicated/path/.I/dont/want/to/forget)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"
A bitcoin "brainwallet" is a secret passphrase you carry in your brain.
The Bitcoin Brainwallet Exponent Calculator is the second of three functions needed to calculate a bitcoin PRIVATE key. Roughly, checksum is the first 8 hex digits of sha256(sha256(0x80+sha256(passphrase)))
Note that this is a bash function, which means you have to type its name to invoke it