Few Linux Commands Copied :)

1. copy files from one linux server to another through shell

   $ scp user@from_computer:dir/filename user@to_computer:dir/filename

2. open shell to another linux machine from one through shell

   $ ssh user@to_computer

3. Prints the owner of every file or directory in the current directory. The AWK syntax is simply “print the 3rd field in every line of data”

   ls -l | awk '{print $3}'

4. To get the owner of only one file (filename):

   ls -l | grep filename | awk '{print $3}'

5. To compress a folder:

   zip -r target.zip folder/

6. User creation

   useradd username

7. Change user password

   passwd username

8. Add user to a group

   usermod -g grpname username

9. Import SQL script to an empty mysql database

   mysql -u root -p database_name < script_file.sql

10. Unfreeze vi editor in terminal window when frozen because of ctrl+S action

    press ctrl+q

11. Reboot linux server remotely

    sudo reboot

12. Shut down linux server remotely

    sudo shutdown -h now

13. Kill a process

    top
    type k to kill a process. You will be prompted for the PID of the task, and the signal to send to it. For a normal kill, send signal 15. For a sure, but rather abrupt, kill, send signal 9. The default signal, as with kill(1), is 15, SIGTERM. This command is not available in secure mode.
    

14. To close port – 80 in following example

    fuser -k 80/tcp

15. To display linux distribution

    1	cat /etc/issue