If you use newsgroups then you'll have come across split files before. Joining together a whole batch of them can be a pain so this will do the whole folder in one. Show Sample Output

Make ogg file from wav file

Rip audio tracks from CD to wav files in current dir

add (server-start) in .emacs

I'm working in a group project currently and annoyed at the lack of output by my teammates. Wanting hard metrics of how awesome I am and how awesome they aren't, I wrote this command up. It will print a full repository listing of all files, remove the directories which confuse blame, run svn blame on each individual file, and tally the resulting line counts. It seems quite slow, depending on your repository location, because blame must hit the server for each individual file. You can remove the -R on the first part to print out the tallies for just the current directory. Show Sample Output

Find Word docs by filename in the current directory, convert each of them to plain text using antiword (taking care of spaces in filenames), then grep for a search term in the particular file. (Of course, it's better to save your data as plain text to make for easier grepping, but that's not always possible.) Requires antiword. Or you can modify it to use catdoc instead.

Knock on ports to open a port to a service (ssh for example) and knock again to close the port. You have to install knockd. See example config file below. [options] logfile = /var/log/knockd.log [openSSH] sequence = 3000,4000,5000 seq_timeout = 5 command = /sbin/iptables -A INPUT -i eth0 -s %IP% -p tcp --dport 22 -j ACCEPT tcpflags = syn [closeSSH] sequence = 5000,4000,3000 seq_timeout = 5 command = /sbin/iptables -D INPUT -i eth0 -s %IP% -p tcp --dport 22 -j ACCEPT tcpflags = syn

A common mistake in Bash is to write command-line where there's command a reading a file and whose result is redirected to that file. It can be easily avoided because of : 1) warnings "-bash: file.txt: cannot overwrite existing file" 2) options (often "-i") that let the command directly modify the file but I like to have that small function that does the trick by waiting for the first command to end before trying to write into the file. Lots of things could probably done in a better way, if you know one... Show Sample Output

This just combines multiple mp3's into one mp3 file. Basically it is a easy join for mp3's

That command bypass the entry limit specifing page results size, when the search arrive to the limit ldapsearch magically reiterate it from the last entry.

Output manpage as plaintext using cat as pager: man -P cat commandname And redirect its stdout into a file: man -P cat commandname > textfile.txt Example: man -P cat ls > man_ls.txt

This is better than doing a "for `find ...`; do ...; done", if any of the returned filenames have a space in them, it gets mangled. This should be able to handle any files. Of course, this only works if you have rename installed on your system, so it's not a very portable command.

no grep, no perl, no pipe. even better in zsh/bash4: for i in **/*oldname*; do "mv $i ${i/oldname/newname/}"; done No find, no grep, no perl, no pipe

Great for sites like Gigapedia.org that give away great free rar'd books. More similar commands here: http://www.howtogeek.com/howto/ubuntu/unzip-or-unrar-many-files-at-once-in-linux/ Show Sample Output

Just copy and paste the code in your terminal. Note : sudo apt-get for debian versions , change as per your requirement . Source : www.h3manth.com

Good for fixing web permissions. You might also want to do something like this and skip files or directories that begin with a period: find public_html/stuff -not -name ".*" \( -type d -exec chmod 755 {} + -o -type f -exec chmod 644 {} + \) ...or include a special case for scripts: find public_html/stuff -type d -exec chmod 755 {} + -or -type f -name "*.pl" -exec chmod 755 {} + -or -exec chmod 644 {} +

This should work anywhere perl and grep is available. :P

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