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» File Permission & Access » Ownership of Linux files » Permissions of Linux files » Changing file permissions » Absolute or Numeric Mode » Symbolic Mode » Changing Owners and Groups

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Changing file permissions

Changing file permissions

We can use the 'chmod' command which stands for 'change mode'. Using the command, we can set permissions (read, write, execute) on a file/directory for the owner, group and the world.
Syntex :
chmod permissions filename
There are 2 ways to use the command :
1. Absolute mode
2. Symbolic mode

» Absolute mode
In this mode, file permissions are not represented as characters but a three-digit octal number.
Example :
chmod 764 generalnote

» Symbolic Mode
In the Absolute mode, you change permissions for all 3 owners. In the symbolic mode, you can modify permissions of a specific owner. It makes use of mathematical symbols to modify the file permissions.
Example :
chmod o + wx generalnote

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