$ cat /proc/version_signature Ubuntu 2.6.24-8.14-generic
$ uname -a Linux ubuntu 2.6.24-8-generic #1 SMP Thu Feb 14 20:40:45 UTC 2008 i686 GNU/Linux
$ cat /proc/version_ signature
Ubuntu 2.6.24-8.14-generic
$ uname -a
Linux ubuntu 2.6.24-8-generic #1 SMP Thu Feb 14 20:40:45 UTC 2008 i686 GNU/Linux