Let me warn you first – these commands are not for newbies, those who just started using Linux or for those who want to start with Linux terminal.

#1 Browse and display images in Terminal

Browse and display images in Terminal? Yes! To browse the images in the current directory:
$ sudo zgv
To browse the images in /home/username/pictures directory:
$ sudo zgv /home/username/pictures

Note: If you get any mouse not initialized message, just unplug your mouse, type zgv and plug your mouse back

#2 Burn a CD/DVD/BluRay Disk

Llet’s add a small twist; make an ISO image of a large folder and burn them to a CD/DVD.
Crate an ISO image (myISOFile) out of a folder (or filename)
$ mkisofs –r –o myISOFile.ISO folderOrFilename
Now burn the above ISO image to a CD/DVD
$ cdrecord --device=cdwriter-device -tao -eject myISOFile.ISO

#3 Create ASCII text graphics

What about creating some ASCII graphics such as the following? You can paste it in your email as a signature to impress your friends

 _     _
| |   (_)_ __  _   ___  __
| |   | | '_ \| | | \ \/ /
| |___| | | | | |_| |>  <
|_____|_|_| |_|\__,_/_/\_\

$ figlet Linux
This is displayed with the default font, to use other fonts, give a font name after switch f:
$ figlet quick tweaks –f script

                      _                            _
             o       | |                          | |
 __,             __  | |    _|_          _   __,  | |   ,
/  |  |   |  |  /    |/_)    |  |  |  |_|/  /  |  |/_) / \_
\_/|_/ \_/|_/|_/\___/| \_/   |_/ \/ \/  |__/\_/|_/| \_/ \/
   |\
   |/    

$ figlet Quick Tweaks –f script

  _ \       _)      |    __ __|                   |
 |   | |   | |  __| |  /    |\ \  \   / _ \  _` | |  /  __|
 |   | |   | | (      <     | \ \  \ /  __/ (   |   < \__ \
 \__\_\\__,_|_|\___|_|\_\  _|  \_/\_/ \___|\__,_|_|\_\____/

The fonts for figlet are installed in /usr/share/figlet directory

#4 Run remote applications in full GUI mode

As a Computer Science student, I often need access my lab computers (which have Fedora installed) through SSH. After I submit my assignments, esp. those GUI based programming assignments, I wanted to check if everything is fine. Accessing remote computer is easy:
$ ssh username@example.com
If you want to run remote applications such as OpenOffice or Eclipse, just uncomment ForwardX11 yes in /etc/ssh/ssh_config file. After that if you type, eclipse, for an example, the remote application will run in full GUI mode.

#5 Split a large file into several pieces (for easy copy)

If you have a large file of about 1 GB size and have two CDs to spare (or two thumb drives of 512 MB each), how can you carry that 1GB file?
$ split –b500m myBigFile mySmallFIles.
To join the smaller files to get the big files back:
$ cat mySmallFiles.* > myBigFile

#6 Take screenshot of a rectangular area and save it as png file

Screenshot taken with import command

$ import –frame myScreenShot.png

After this command, the mouse pointer changes to a set of cross-hairs; left-click and drag the mouse across an area of the screen and release the mouse to capture the selected area.

#7 Resize an image, put a border around it, and add a comment

$mogrify -geometry 300x200 -border 8x8 -comment “Windows Sucks” myScreenShot.png

#8 Quickly converting a .wav file to a .mp3 file

$ lame myMusicFile.wav myMusicFile.mp3

#9 Display a nicely formatted calendar (or doing some quick maths?)

$ cal 1972

Get the factorial of 10

$ calc 10!

#10 Mirror a website to your computer for offline browsing

$ wget -mk http://example.com

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