Shulou(Shulou.com)06/02 Report--

Symbolic meaning of permissions in Linux files

In Linux, each file has different permissions. Users can use the ls-l command to view permission properties. Where the meaning of the symbol is as follows:

R: read permission.

W: write permission.

X: executable permissions.

-: no permission.

S:SET bit permissions.

T: sticky bit permission.

For example, the permission for the executable file ls is-rwxr-xr-x. The first symbol represents the file type, and-represents the normal file, followed by owner permissions, group permissions, and other user permissions. Here, it means that the owner permissions of the ls file are read, write, and executable; the permissions of the group are read and executable; and the other user permissions are read and executable. After some file permission attributes, it may appear as a dot, plus sign, or space, such as "- rw-rw-r--." Or "- rw-r--r--+". Where a bit after the permission attribute indicates that the file has "SELinux's security context"; the permission attribute is marked with a plus sign (+), indicating that the ACL (Access Control List) permission is used. If a space is appended to the file permission, the system has no replaceable access control measures.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.