Changing File Permission

If you created a text file as a root then normal user can't write to it without root access in that case we have to change file permission.

First we have to create a text file as root
use touch to create a file
Now we can see only root user can read and write to it.



To change the permission use
chmod o+w filename

• u for current user
• g for group
• o for other
• + to add permission
• - to remove permission
• r for read
• w for write
• x for execute

Now we can see that permission is changed.

If you are changing permission of a directory and it has some files in it and you want to change permission of that files also then use.

chmod -R o+w mydir

-R will not only change the permision of directory but it will also change the permission of all files in it.