Commands by conradolandia (1)

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List your interfaces and MAC addresses
Requires sysfs mounted on /sys - may only be useful for Linux systems. Could also use "printf '%-8s %s\n' $(basename $f) $(cat $f/address)" instead of echo.

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" }

Remove duplicate rows of an un-sorted file based on a single column
$F[0] filters using first word. $F[1] - 2nd, and so on.

Empty a file

Convert a Python interactive session to a python script
Used to copy and paste a terminal buffer of a python interactive session into an editor

Quickly generate an MD5 hash for a text string using OpenSSL

Decode a MIME message
will decode a mime message. usefull when you receive some email and file attachment that cant be read.

Create subdirectory and move files into it
With this form you dont need to cut out target directory using grep/sed/etc.

duration of the DNS-query

Reducing image size
Adding the exclamation mark to the image geometry ignores the original aspect ratio. More info about image geometry: http://www.imagemagick.org/script/command-line-processing.php#geometry


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