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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" }

mirrors directory to a ftp server
http://lftp.yar.ru/

creeate file named after actual date
Create a file with actual date as filename

find and delete empty dirs, start in current working dir
A quick way to find and delete empty dirs, it starts in the current working directory. If you do find . -empty -type d you will see what could be removed, or to a test run.

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" }

Generate a certificate signing request (CSR) for an existing private key. CSR.csr MUST be exists before
CSR.csr MUST be exists before

find directory with most inodes/files
Find which directory in one filesystem that contains most inodes or files.

Change host name
With sed you can replace strings on the fly.

Extract extention of a file

Factory reset your android device via commandline.


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