redhat – RHEL6 ls输出中新的句号/句点意味着什么？

我们有脚本查看ls -l输出的输出,以获取最近在RHEL v6系统上失败的权限信息,这些信息似乎显示了额外的内容.在之前不曾存在的权限条目的末尾：

[root@rhel6vm ~]# ls -l
total 44
-rw-------. 1 root root  1399 Aug 17 15:01 anaconda-ks.cfg
-rw-r--r--. 1 root root 25485 Aug 17 15:01 install.log
-rw-r--r--. 1 root root  7253 Aug 17 14:59 install.log.syslog
[root@rhel6vm ~]#
          ^
          | up there

句号意味着什么？还有什么可以出现在它的位置？

解决方法

info ls显示：

Following the file mode bits is a single ch@R_404_6460@cter that specifies
 whether an alternate access method such as an access control list
 applies to the file.  When the ch@R_404_6460@cter following the file mode
 bits is a space,there is no alternate access method.  When it is
 a printing ch@R_404_6460@cter,then there is such a method.

 GNU `ls' uses a `.' ch@R_404_6460@cter to indicate a file with an SELinux
 security context,but no other alternate access method.

 A file with any other combination of alternate access methods is
 marked with a `+' ch@R_404_6460@cter.