In Linux, who can do what to a file or directory is controlled through sets of permissions. There are three sets of permissions. One set for the owner of the file, anothe… See more

We can use the -l (long format) option to have lslist the file permissions for files and directories. On each line, the first character identifies the type of entry that is being listed. If it i… See more

To use chmodto set permissions, we need to tell it: 1. Who: Who we are setting permissions for. 2. What: What change are we making? Are we adding or removing the permission… See more

Let's say we have a file where everyone has full permissions on it. We want the user dave to have read and write permissions and the group and other users to have read permission… See more

We can apply permissions to multiple files all at once. These are the files in the current directory: Let's say we want to remove the read permissions for the "other" users from … See more