echo "show session\n print type:nsr" | nsradmin -i- | wc -l
      29

It just gave me the number of sessions, however i would like the result a bit 
more precise, telling me about different backups, full or inc or whatever, some 
info abt backup sessions, And completion percentage, like in NMC

+----------------------------------------------------------------------
|This was sent by mytechnicalknowledgebase AT gmail DOT com via Backup Central.
|Forward SPAM to abuse AT backupcentral DOT com.
+----------------------------------------------------------------------

To sign off this list, send email to listserv AT listserv.temple DOT edu and 
type "signoff networker" in the body of the email. Please write to 
networker-request AT listserv.temple DOT edu if you have any problems with this 
list. You can access the archives at 
http://listserv.temple.edu/archives/networker.html or
via RSS at http://listserv.temple.edu/cgi-bin/wa?RSS&L=NETWORKER