Commands using sort (800)

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Quickly ping range of IP adresses and return only those that are online

Bash command to convert IP addresses into their "reverse" form

Take screenshots with imagemagick
Now try this. Ones you see small cross arrow, double click on any window you like to make a screenshot "selectively".

ssh autocomplete
Stop tormenting the poor animal cat. See http://sial.org/howto/shell/useless-cat/. Edit: replaced $ sort | uniq by $ sort -u

Resize A Mounted EXT3 File System
Live extension of an ext3 file system on logical volume $v by 200GB without the need to unmount/remount. Requires that you have 1) a version of resize2fs that contains code merged from ext2online, and 2) kernel support for online resizing. (e.g. RHEL 5)

generate iso

Using a single sudo to run multiple && arguments
This will also work with bash instead of sh shell sudo bash -c 'apt update -y && apt upgrade -y'

Convert ascii string to hex
Converts the ascii text to hex from bash. Check the sample output.

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" }

ping a host until it responds, then play a sound, then exit
Audio acknowledgement for host availability. When running the command from a Linux systems, you can use "festival" or "espeak" instead of "say".


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