Creates a single primary partition starting at sector 0 and extending to the end of the disk. Use with care.

A tweak using Patola's code as a base, this full-width green matrix display has all the frills (and all the printable characters). You don't need the surrounding parens if you don't care about losing globbing capabilities. Z-shell (/bin/zsh) needs neither the parens nor the `set -o noglob` Screen shot (animated): http://desmond.imageshack.us/Himg32/scaled.php?server=32&filename=matrixh.gif&res=landing If it's too slow, try lowering the `sleep 0.05` or even replacing it with `true` (which is faster than `sleep 0`). I squashed it as narrow as I could to conserve space, though somebody could probably squeeze a char or two out. Enjoy!

">>" appends to the file ">" replaces the entire file make sure to use ">>" Show Sample Output

This was done in csh. Show Sample Output

This command takes a few changes to get to the file format, but once you have that, you're good to go. Set your environment variables and then change the text "front" and "back" to whatever you're files start and end with. You'll end up with some easily sort-able files. Show Sample Output

save as shell script and pipe your command output Show Sample Output

This command allows you to revert every modified file one-by-one in a while loop, but also after "echo $file;" you can do any sort of processing you might want to add before the revert happens. Show Sample Output

Create a bash function for easy reference webPassword() { echo $1 $2 | md5sum | awk '{print substr($0,0,10)}' } alias webpwd=webPassword Use like this. webpwd www.commandlinefu.com MyPetNameHere Show Sample Output

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added echo "### Crontabs for $user ####"; to make clear whose crontab is listed.

Show the crontabs of all the users. Show Sample Output

This command clones an image three times and creates a 'tile' image that can be used for a repeating pattern wallpaper. Add 'rm $f $of $off' to the end for cleanup (command was too long to submit with it). See this link for an example: http://meathive.deviantart.com/art/Easy-Photography-Hack-314846774

This version combines the best of the other suggestions and adds these features: 1. It scans a /16 subnet 2. It is very fast by running the ping commands in the background, running them in parallel. 3. Does not use the "-W" option as that's not available in older ping versions (I needed this for OS X 10.5)

You can execute this inside an editor to get all the fields inside your buffer and do the magic, really usefull when your tables contain a giant list of fields. Show Sample Output

If there are spaces won't work.

Use if you want to include untrusted literal strings in your grep regexes. I use it to list all mounts below a directory: dir=/mnt/gentoo; cat /proc/mounts |awk '{print $2}' |egrep "^$(egrep_escape "$dir")(/|$)" /mnt/gentoo /mnt/gentoo/proc /mnt/gentoo/sys /mnt/gentoo/dev /mnt/gentoo/home Works even if $dir contains dangerous characters (e.g. comes from a commandline argument). Show Sample Output

usage: alarmclock TIME TIME is a sleep(1) parameter which tells function how long to wait until raise the alarm.

Echoes text horizontally centralized based on screen width

The command will make it easy to determine free IP ranges in a crowded sub-net. Show Sample Output

Now we can capture only a specific window (we have to chose by clicking on it) ffmpeg complains about "Frame size must be a multiple of 2" so we calculate the upper even number with (g)awk trickery. We remove the grep, we are already using (g)awk here ....why losing time with grep !!! ;) Show Sample Output

This is the fastest way to burn a DVD-Video from the command line. Dependencies: libav-tools dvdauthor growisofs The first command: avconv -i input.avi -target pal-dvd dvd.mpg converts any given video file avconv can handle into MPEG2-PS (6 Mbit/s) with AC3 audio (448 kbit/s). If your distribution is not up to date, just use ffmpeg - the syntax is the same. Hint: If you want to create an NTSC DVD, type ntsc-dvd instead ;-) The second command: echo PAL > ~/.config/video_format sets PAL as your default video format. This is a workaround for an old dvdauthor bug. If you want NTSC, guess what? Type NTSC instead! The third command: dvdauthor -o dvd/ -t dvd.mpg creates .VOB files and adds them to the dvd/ folder. You don't have to create this folder yourself. You can add as many titles as you like, just keep in mind that there's a maximum of 4482 MiB (4.37 GiB) for normal DVDs. The fourth command: dvdauthor -o dvd/ -T finishes the DVD-Video. Now you can burn your DVD using growisofs: growisofs -Z /dev/dvd -dvd-video dvd/ Sources: manpages http://tuxicity.wordpress.com/2006/12/01/avi-to-dvd-with-ffmpeg-and-dvdauthor/

Using the output of 'ps' to determine CPU usage is misleading, as the CPU column in 'ps' shows CPU usage per process over the entire lifetime of the process. In order to get *current* CPU usage (without scraping a top screen) you need to pull some numbers from /proc/stat. Here, we take two readings, once second apart, determine how much IDLE time was spent across all CPUs, divide by the number of CPUs, and then subtract from 100 to get non-idle time. Show Sample Output