How do I use chmod in Linux?

What does chmod do in Linux?

Chmod is a command used to change the file permissions in Linux, allowing you to control who can read, write, or execute a file.

How do I use chmod to give everyone read access to a file?

You can use the command chmod a+r filename to give read access to all users for the specified file.

What do the letters r, w, and x stand for?

The letters stand for: 'r' for read, 'w' for write, and 'x' for execute permissions.

Can I set permissions for specific users?

Yes, you can use chmod with user categories: 'u' for user, 'g' for group, and 'o' for others. For example, chmod u+x filename adds execute permission for the user.

What is the numeric mode for setting permissions?

The numeric mode uses numbers to set permissions: 4 for read, 2 for write, and 1 for execute. You can combine them, like chmod 755 filename.