Commands using lftp (11)

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Encrypted archive with openssl and tar
command to decrypt: $ openssl enc -aes-256-cbc -d < secret.tar.enc | tar x Of course, don't forget to rm the original files ;) You may also want to look at the openssl docs for more options.

gvim in full screen (execute again to toggle full screen on/off)
Only under linux. Requires Gvim compiled with "clientserver" functionality and wmctrl command installed on system. Instead of servername can be used the current edited file name. Put it in a function and map it for get rid of "Press a key" after execution.

ubuntu easter eggs

Get a diff of two json arrays
jq is amazing for manipulating json on the commandline, but the developers have some weird ideas about how to handle shell redirections. This command works around them. Further reading:

Extracting frames from a video as jpeg files
This command extracts 10 seconds worth of frames, starting from 00:15:45 position, from filename.avi and stores them into out_frames folder as jpeg files. Subtitles are turned off with -sid 999 option.

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 a .wmv to a .avi

Binary digits Matrix effect
Prints 0's and 1's in The Matrix style. You can easily modify to print 0-9 digits using $RANDOM %10 insted of %2.

Currency Conversion
This works in Mac OS X (10.6.2) (natively comes with curl) usage: currency_convert $1(amount) $2(from_denomination) $3(to_denomination)

Monitor open connections for httpd including listen, count and sort it per IP
It's not my code, but I found it useful to know how many open connections per request I have on a machine to debug connections without opening another http connection for it. You can also decide to sort things out differently then the way it appears in here.

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