Commands by jlbknr (2)

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Is today the last day of the month?
Nice simple example of something we can do in bash.

Sort by IP address

pipe output to notify-send
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)"

Export OPML from Google Reader

Count the number of pages of all PDFs in current directory and all subdirs, recursively

Calculate days on which Friday the 13th occurs (inspired from the work of the user justsomeguy)
Friday is the 5th day of the week, monday is the 1st. Output may be affected by locale.

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"

Truncate 0.3 sec from an audio file using sox
Using this command one can cut a piece from the end of an audio file.

uniq without pre-sorting
Reads stdin, and outputs each line only once - without sorting ahead of time. This does use more memory than your system's sort utility.

Kill a process by its partial name (BSD/Mac)
This kills Activity Monitor


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