Check These Out
This is easy to type if you are looking for a few (hundred) "missing" megabytes (and don't mind the occasional K slipping in)...
A variation without false positives and also finding gigabytes (but - depending on your keyboard setup - more painful to type):
$du -hs *|grep -P '^(\d|,)+(M|G)'|sort -n
(NOTE: you might want to replace the ',' according to your locale!)
Don't forget that you can
modify the globbing as needed! (e.g. '.[^\.]* *' to include hidden files and directories (w/ bash))
in its core similar to:
http://www.commandlinefu.com/commands/view/706/show-sorted-list-of-files-with-sizes-more-than-1mb-in-the-current-dir
Usefull to detect if a commad that your script relies upon is properly installed in your box, you can use it as a function
function is_program_installed() {
type "$1" >/dev/null
}
Invoke it and check the execution code
is_program_installed "dialog"
if [ ! $? -eq 0 ]; then
echo "dialog is not installed"
exit 1
fi
use find with rsync
This will perform one of two blocks of code, depending on the condition of the first. Essentially is a bash terniary operator.
To tell if a machine is up:
$ ping -c1 machine { echo succes;} || { echo failed; }
Because of the bash { } block operators, you can have multiple commands
$ ping -c1 machine && { echo success;log-timestamp.sh }|| { echo failed; email-admin.sh; }
Tips:
Remember, the { } operators are treated by bash as a reserved word: as such, they need a space on either side.
If you have a command that can fail at the end of the true block, consider ending said block with 'false' to prevent accidental execution
A function for streaming youtube to mplayer.
The option "-g" for youtube-dl tells it to output the direct video URL, instead of downloading the video.
"-fs" tells MPlayer to go FullScreen, and "-quit" makes it less verbose.
Requires: youdube-dl ( http://bitbucket.org/rg3/youtube-dl/ )
(Tested in zsh)
This alias is super-handy for me because it quickly shows the details of each file in the current directory. The output is nice because it is sortable, allowing you to expand this basic example to do something amazing like showing you a list of the newest files, the largest files, files with bad perms, etc..
A recursive alias would be:
$ alias LSR='find -mount -printf "%.5m %10M %#9u:%-9g %#5U:%-5G %TF_%TR %CF_%CR %AF_%AR %#15s [%Y] %p\n" 2>/dev/null'
From: http://www.askapache.com/linux/bash_profile-functions-advanced-shell.html
This will record the capture channel of your soundcard, directly encoded in Ogg Vorbis, in stereo at quality 5 (I'm using this to record live jam sessions from my line input). You can choose which device to capture (eg. line input, microphone or PCM output) with
$ alsamixer -V capture
You can do the same thing and live encode in MP3 or FLAC if you wish, just check FLAC and LAME man pages.
