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Produce a pseudo random password with given length in base 64

Delete all git branches except master
Delete all your branches except master (useful after archiving branches)

Application network trace based on application name
This command takes an application name as an argument and then it will listen to the tcp traffic and capture packets matching the process Id of the application. The output shows: local address / local port / Remote Address / Remote port / State / Owning Process ID

Marks all manually installed deb packages as automatically installed.
An alternative without aptitude.

When feeling down, this command helps
$ sudo apt-get install sl $ man sl

a function to find the fastest DNS server
http://public-dns.info gives a list of online dns servers. you need to change the country in url (br in this url) with your country code. this command need some time to ping all IP in list.

Daily watch "question pour un champion" (French TV show)
kaffeine could be replaced by any player able to read mms stream

Remove everything except that file
it will remove everything except the file names matching you can use also use wildcards

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"

lines in file2 that are not in file1


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