Remove security from PDF document using this very simple command on Linux and OSX. You need ghostscript for this baby to work.

This is useful if you have need to do port forwarding and your router doesn't assign static IPs, you can add it to a script in a cron job that checks if you IP as recently changed or with a trigger script. This was tested on Mac OSX.

The backtick operator, in general, will execute the text inside the backticks. On OS X, the pbpaste command will put the contents of the OS X clipboard to STDOUT. So if you put backticks around pbpaste, the text from the OS X clipboard is executed. If you add the pipeline | pbcopy, the output from executing the command on the clipboard is placed back on the clipboard. Note: make sure the clipboard is text only. Show Sample Output

To unmount, replace "attach" with "eject"

Installing most OSX apps is just a matter of dropping it in /Applications, either GUI-wise or with cp -r. However, many packages are distributed in "mpkg" format, and those have to be installed with an installer. If you don't want to go to the trouble of firing up VNC to install an mpkg, you can use the "installer" command. This will install an application from a .mpkg it to /Applications system-wide. To install a program for just one user, replace "-target /" with "-target username".

Schedule your Mac to sleep at any future time. Also wake, poweron, shutdown, wakeorpoweron. Or repeating with sudo pmset repeat wakeorpoweron MTWRFSU 7:00:00 Query with pmset -g sched Lots more at http://www.macenterprise.org/articles/powermanagementandschedulingviathecommandline

Redirects the contents of your clipboard through a pipe, to a remote machine via SSH.

This command can be used with xclip or xsel for use on a linux box. Show Sample Output

OSX's BSD version of the du command uses the -d argument instead of --max-depth.

adjusting the field "f1" will give you additional information such as f1 = 98% f2 = discharging f3 = 2:02 remaining Show Sample Output

Usage: google "[search string]" Example: google "something im searching for" This will launch firefox and execute a google search in a new tab with the provided search string. You must provide the path to your Firefox binary if using cygwin to $ff or create an alias like follows: alias firefox='/cygdrive/c/Program Files (x86)/Mozilla Firefox/firefox.exe' Most Linux flavors with Firefox installed will use just ff="firefox" and even OSX.

I use terminal with black background on the Mac. Unfortunately, the default ls color for the directory is blue, which is very hard to see. By including the line above in my ~/.bash_profile file, I changed the directory's color to cyan, which is easer to see. For more information on the syntax of the LSCOLORS shell variable: man ls I tested this command on Mac OS X Leopard

I often use this command to learn pronunciation of unfamiliar words.

MAC OSX doesn't come with an updatedb command by default, this will emulate the updatedb thats on a typical Linux OS. Simply add it to your ~/.bash_profile

This uses ssh to transfer the contents of one Mac's clipboard to another's. This only works with plain text, sadly. Trying to transfer images will just clear out the remote machine's clipboard, and rich text will be converted to plain text. Using the "Remote Login" must be enabled on the remote machine (via System Preferences' Sharing panel) for this to work.

The closer to zero the better.Credit to TheSeb on macrumors: http://forums.macrumors.com/showthread.php?t=1289884 Show Sample Output

Specific to OSX. Show Sample Output

If the password for the share your trying to mount contains special characters you can use URL escape characters. The above command uses an example as follows: username: user password: p@ss URL Encoded password: p%40ss All credit goes to Richard York: http://www.smilingsouls.net/Blog/20110526100731.html Also check out this URL Decoder/Encoder to convert your passwords. http://meyerweb.com/eric/tools/dencoder/

Online games have pretty good lag compensation nowadays, Sometimes though, you really want to get some warning about your latency, e.g. while playing Diablo III in Hardcore mode, so you know when to carefully quit the game b/c your flatmate started downloading all his torrents at once. This is done on Darwin. On Linux/*nix you would need to find another suitable command instead of `say` to spell out your latency. And I used fping because it's a little bit easier to get the latency value needed. Something similar with our regular ping command could look like this: while :; do a=$(ping -c1 google.com | grep -o 'time.*' | cut -d\= -f2 | cut -d\ -f1 | cut -b1-4); [[ $a > 40 ]] && say "ping is $a"; sleep 3; done

Formats the output from `ioreg` into XML, then parses the XML with `xmllint`'s xpath feature. Show Sample Output

adding users to groups on OS X is not a straightforward process, you need to use the new in built in Directory Service command line utility...