What are Unix permissions and how do they work?

What are Unix permissions and how do they work?

Unix permissions determine who can read, write, or execute a file. They are represented by three sets of permissions: owner, group, and others.

Can you explain the symbols used for permissions?

Sure! The symbols are 'r' for read, 'w' for write, and 'x' for execute. For example, 'rwx' means read, write, and execute permissions are granted.

How can I change the permissions of a file?

You can use the chmod command followed by the permission settings and the file name. For example, chmod 755 filename.

What does the number 755 mean in permissions?

The number 755 means the owner has read, write, and execute permissions (7), while the group and others have read and execute permissions (5).