pepe@PC-Pepe-Linux:~$ if grep root /etc/passwd >/dev/null 2>&1; then echo "ano"; else echo "ne"; fi
ano
pepe@PC-Pepe-Linux:~$ uname -a
Linux PC-Pepe-Linux 3.5.0-23-generic #35~precise1-Ubuntu SMP Fri Jan 25 17:13:26 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
pepe@PC-Pepe-Linux:~$