Dot (.) After the file permission flags in Redhat

Phenomenon:

$ rsh coolnjmcl033 ' ls-l/opt/cool/tools/lib/coolvirtenv '
ls:cannot access/opt/cool/tools/lib/coolvirtenv: Permission denied

[root@coolnjmcl033 etc]# ls-l/opt/cool/tools/lib/coolvirtenv
-rwxr-xr-x. 1 Cool Cool 29852 June June 03:16/opt/cool/to Ols/lib/coolvirtenv

According to Http://www.redhat.com/archives/rhelv6-list/2010-December/msg00076.html,

from ' info ls ':

      following the ' file mode bits is ' a single character that Specifie S
     Whether an alternate access method such as a access control list
   &NB Sp Applies to the file.  the character following the file mode
     bits are a space, there is no alternate access method.  where it is
     a printing character, then there is such a me Thod.

     GNU ' ls ' uses a ' character to indicate a file with a SELinux
   & nbsp Security context, but No. alternate access method.

     A file with the combination of alternate access methods is
   & nbsp marked with a ' + ' character.

In order to make the files located on one server can is accessied by the other servers, SELinux should is disabled. In order to disable SELinux and  refer to the disable SELinux.