Linux 上的 ls -l 命令中的点是什么？

Question

I ran ls -l on my centOS 6.10 on a specific file.

My question is what is the meaning of this dot( . ) before 1 ?

-rw-r--r--. 1 root root  575 Oct 23

Answer 1

It means that the file has an SELinux context. Use ls -Z to see the actual SElinux context values. It's documented on the "info" file for GNU Coreutils: What-information-is-listed .

The relevant quote:

 Following the file mode bits is a single character that specifies
 whether an alternate access method such as an access control list
 applies to the file.  When the character following the file mode
 bits is a space, there is no alternate access method.  When it is a
 printing character, then there is such a method.

 GNU ‘ls’ uses a ‘.’ character to indicate a file with a security
 context, but no other alternate access method.

 A file with any other combination of alternate access methods is
 marked with a ‘+’ character.

Follow the link for more details