Commands by ehmicky (1)

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commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

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List apache2 virtualhosts
Lists virtualhosts currently enabled for apache2, showing the ServerName:port, conf file and DocumentRoot

Calculate days on which Friday the 13th occurs
I removed the dependency of the English language

list files recursively by size

Print the contents of $VARIABLE, six words at a time
Print out the contents of $VARIABLE, six words per line, ignoring any single or double quotes in the text. Useful when $VARIABLE contains a sentence that changes periodically, and may or may not contain quoted text.

convert from decimal to hexadecimal
Use the standard calculator bc to convert decimals to hex

Convert number of bytes to human readable filesize
Converts a number of bytes provided as input, to a human readable number.

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" }

Get current Xorg resolution via xrandr

Stamp a text line on top of the pdf pages.
To quickly add some remark, comment, stamp text, ... on top of (each of) the pages of the input pdf file.

convert wav files to flac
cd to the folder containing the wav files, then convert them all to flac. yeah baby! in ubuntu, to get the flac program just: sudo apt-get install flac flac file input formats are wav, aiff, raw, flac, oga and ogg

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