THIS COMMAND IS DESTRUCTIVE. That said, lets assume you want to render your boot drive unbootable and reboot your machine. Maybe you want it to boot off the network and kickstart from a boot server for a fresh OS install. Replace /dev/fd0 with the device name of your boot drive and this DESTRUCTIVE command will render your drive unbootable. Your BIOS boot priority should be set to boot from HD first, then LAN.

I wanted to keep a backup of my company database server on my local homeserver. After I found maatkit to sync databases, everything except security seemed fine. SSH takes care of that part.

shows also time if its the same year or shows year if installed before actual year and also works if /etc is a link (mac os)

Have wc work on each file then add up the total with awk; get a 43% speed increase on RHEL over using "-exec cat|wc -l" and a 67% increase on my Ubuntu laptop (this is with 10MB of data in 767 files).

One pipe less.

Every seconds do

Based on the MrMerry one, just add some visuals to differentiate files and directories

An NCurses version of the famous old 'du' unix command

Based on the MrMerry one, just add some visuals and sort directory and files

To highlight the difference between screen updates

If you need to keep an eye on a command whose output is changing, use the watch command. For example, to keep an eye on your load average

If you launch gnome-terminal manually, you can start with three open tabs

checkfor: have the shell check anything you're waiting for.

'while : ; do' is an infinite loop

'$*' executes the command passed in

'sleep 5' - change for your tastes, sleep for 5 seconds

bash, ksh, likely sh, maybe zsh

Ctrl-c to break the loop

For example: check the APT security keys to make sure the Google digital signature was imported correctly

You can view the man pages from section five by passing the section number as an argument to the man command

fcd : file change directory

A bash function that takes a fully qualified file path and cd's into the directory where it lives. Useful on the commadline when you have a file name in a variable and you'd like to cd to the directory to RCS check it in or look at other files associated with it.

Will run on any ksh, bash, likely sh, maybe zsh.

Make sure that find does not touch anything other than regular files, and handles non-standard characters in filenames while passing to xargs.

Sends both stdout and stderr to the pipe which captures the data in the file 'out.test' and sends to stdout of tee (likely /dev/tty unless redirected). Works on Bourne, Korn and Bash shells.

needs no GNU tools, as far as I see it

saves one command. Needs GNU grep though :-(