lsb_release -a
or
cat /etc/issue
PROCESSID=1; TYPE="Rss";echo 0 $(cat /proc/`$PROCESSID`/smaps | grep $TYPE | awk '{print $2}' | sed 's#^#+#') | bc
Where $PROCESSID is the name of the process you want to inspect and $TYPE is one of:
Rss: resident memory usage, all memory the process uses, including all memory this process shares with other processes. It does not include swap;Shared: memory that this process shares with other processes;Private: private memory used by this process, you can look for memory leaks here;Swap: swap memory used by the process;Pss: Proportional Set Size, a good overall memory indicator. It is the Rss adjusted for sharing: if a process has 1MiB private and 20MiB shared between other 10 processes, Pss is 1 + 20/10 = 3MiB