1. Kill a running application by its name
killall [app_name]
2. Display disk space usage:
df –h
3. Locate the installation directories of a program:
whereis [app]
4. Mount an .iso file:
mount /path/to/file.iso /mnt/cdrom –oloop
5. Record or capture a video of your desktop:
ffmpeg -f x11grab -s wxga -r 25 -i :0.0 -sameq /tmp/out.mpg
6. Find out the Universally Unique Identifier (UUID) of your partitions:
ls /dev/disk/by-uuid/ -alh
7. Show the top ten running processes (sorted by memory usage):
ps aux | sort -nrk 4 | head
8. Make an audible alarm when an IP address goes online:
ping -i 60 -a IP_address
9. Run the last command as root:
sudo !!
10. Make a whole directory tree with one command:
mkdir -p tmp/a/b/c
11.. restart : Restart the computer
12. shutdown : To shutdown the computer from terminal
13. gksudo : Run GUI Application with Root privilege
14. wget : Download files from server
GNU Wget or wget is very handy in downloading stuffs from internet, over the command line.
15. mv : rename or move a file/directory
the above command will move the file from the current directory to target directory.
it will rename the file to new_logo.jpg.
16. sudo : superuser do, to gain root privilege
e.g
Then enter your user account password, and you would be able to do administrative tasks like root. So if you’re getting any permission error using a command, then adding sudo as a prefix, might help.
17. rm : remove/delete file/directory
NOTE : it removes directories only if it’s empty, unless you specify -f flag for force deletion. But you must be careful with the arguments such as -r, -f. (-rf is very dangerous).
18. mkdir : make/create directory.
19. pwd : print the current/working directory
20. cd : Change Directory
Remember,
. represents the current directory
.. represents the parent directory
~ represents the home directory (of the user)
killall [app_name]
2. Display disk space usage:
df –h
3. Locate the installation directories of a program:
whereis [app]
4. Mount an .iso file:
mount /path/to/file.iso /mnt/cdrom –oloop
5. Record or capture a video of your desktop:
ffmpeg -f x11grab -s wxga -r 25 -i :0.0 -sameq /tmp/out.mpg
6. Find out the Universally Unique Identifier (UUID) of your partitions:
ls /dev/disk/by-uuid/ -alh
7. Show the top ten running processes (sorted by memory usage):
ps aux | sort -nrk 4 | head
8. Make an audible alarm when an IP address goes online:
ping -i 60 -a IP_address
9. Run the last command as root:
sudo !!
10. Make a whole directory tree with one command:
mkdir -p tmp/a/b/c
11.. restart : Restart the computer
restart
12. shutdown : To shutdown the computer from terminal
shutdown -h
13. gksudo : Run GUI Application with Root privilege
gksudo nautilus
14. wget : Download files from server
GNU Wget or wget is very handy in downloading stuffs from internet, over the command line.
wget url_of_the_content
15. mv : rename or move a file/directory
mv file1 ~/Downloads/Archive/
the above command will move the file from the current directory to target directory.
mv logo_2.jpg new_logo.jpg
it will rename the file to new_logo.jpg.
16. sudo : superuser do, to gain root privilege
e.g
sudo apt-get install gnome-shell
Then enter your user account password, and you would be able to do administrative tasks like root. So if you’re getting any permission error using a command, then adding sudo as a prefix, might help.
17. rm : remove/delete file/directory
rm useless.sh
NOTE : it removes directories only if it’s empty, unless you specify -f flag for force deletion. But you must be careful with the arguments such as -r, -f. (-rf is very dangerous).
18. mkdir : make/create directory.
mkdir funny_stuffs
19. pwd : print the current/working directory
pwd /home/Desktop/scripts
20. cd : Change Directory
cd ../ cd /home/Desktop
Remember,
. represents the current directory
.. represents the parent directory
~ represents the home directory (of the user)
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