# su - nobody No directory, logging in with HOME=/ nobody@jidanni2:/$ date > /tmp/cc nobody@jidanni2:/$ ln -s /tmp/cc /tmp/dd nobody@jidanni2:/$ ls -l /tmp/cc /tmp/dd -rw-r--r-- 1 nobody nogroup 29 Sep 7 08:37 /tmp/cc lrwxrwxrwx 1 nobody nogroup 7 Sep 7 08:37 /tmp/dd -> /tmp/cc nobody@jidanni2:/$ su - # cat /tmp/cc /tmp/dd Fri Sep 7 08:37:38 CST 2012 cat: /tmp/dd: Permission denied # tail /var/log/syslog Sep 7 08:36:46 jidanni2 kernel: [19394.443080] type=1400 audit(1346978206.292:11): op=follow_link action=denied pid=19327 comm="cat" path="/tmp/bb" dev="tmpfs" ino=275448 # uname -a Linux jidanni2 3.2.0-3-486 #1 Mon Jul 23 02:47:49 UTC 2012 i686 GNU/Linux
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