Commands by fzero (4)

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Find all clients connected to HTTP or HTTPS ports
It finds, specifically, the connections to the HTTP and HTTPS ports as source ports. You can check for destination ports as well.

list block devices
Shows all block devices in a tree with descruptions of what they are.

ignore the .svn directory in filename completion
When browsing java source code (for example) it's really annoying having to type the first letter of the package when there is only one package in the subdir. man bash for more info about FIGNORE

Reset hosed terminal,
stty sane resets the tty to basic usable function. The ^J is a newline -- sometimes CR/LF interpretation is broken so use the ^J explicitly.

Search for files older than 30 days in a directory and list only their names not the full path

Convert seconds to [DD:][HH:]MM:SS
Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

Convert CSV to JSON
Replace 'csv_file.csv' with your filename.

Runs a command without hangups.
The improvement is that you can re-attach to the screen at a later point.

Add to Instapaper
Adds URL to Instapaper. Usage: instapaper-add [email protected] 12345 http://www.commandlinefu.com/

Sysadmin day date of any given year
Calculate the date of Sysadmin day (last Friday of July) of any given year


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