What are some advanced examples of using chmod?

Can you give me some advanced examples of using chmod?

Sure! One advanced example is using chmod with symbolic notation to set permissions for multiple users. For instance, chmod g+w,o-r file.txt adds write permission for the group and removes read permission for others.

What does the g+w and o-r mean in that command?

In that command, g+w means 'add write permission for the group', and o-r means 'remove read permission for others'. You can combine these to modify permissions efficiently.

Are there any examples of using chmod with recursive options?

Yes! You can use chmod -R 755 directory/ to set read, write, and execute permissions for the owner, and read and execute for the group and others, recursively for all files and subdirectories.

What about using numeric modes with chmod?

Using numeric modes, you can set permissions with a three-digit number. For example, chmod 644 file.txt sets read and write for the owner, and read-only for the group and others.