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what is . in file or directory permision

e.g. -rw-rw-r--. 1 asterisk asterisk 1869 Apr 20 16:04 sip_additional.conf

Its about ACL (SELINUX), but what does that . exactly represents.

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2 Answers 2

The . means that POSIX ACLs exist which may provide other access to the file.

Use the getfacl command to see them.

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I am quoting

http://linuxzoo.net/page/sec_file.html

-rxwrwxrwx.
  |   \  \ \___________
  |    \  \__          \
  |     |    \          \
owner  group  other    alternative access method indicator
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