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Delete all empty/blank lines from text file & output to file

draw line separator (using knoppix5 idea)
This is a slightly modified version of the knoppix5 user oneliner (https://www.commandlinefu.com/commands/view/24571/draw-line-separator).

Every Nth line position # (SED)
sed extract every nth line. Generic is: $ sed -n 'STARTPOSITION,${p;n;*LINE}' foo where n;*LINE = how many lines. thus p;n;n; is "for every 3 lines" and p;n;n;n;n; is "for every 5 lines"

Find files containing string and open in vim
I often use "vim -p" to open in tabs rather than buffers.

Fire CMD every time FILE (or directory) is updated (on *BSD)

Rename files in batch

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"

Command to logout all the users in one command
Only to logout all users except root

Start a quick rsync daemon for fast copying on internal secure network
"Sample output" shows a minimalistic configuration file.

Email a file to yourself
This works on Solaris 10.


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