Can netbackup linux clients check for backups?

NetBackup Command :- bpclimagelist

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bpclimagelist: unrecognized option -?
USAGE: bpclimagelist [-U | -Likelydate] [-Listseconds]
      [-client clientname] [-server servername] [-BE]
      [-t FULL | INCR | CINC | UBAK |  UARC | ANY | NOT_ARCHIVE]
      [-policy policy_name] [-keyword "keyword phrase"] [-ct client_type]
      [-s mm/dd/yyyy HH:MM:SS] [-e mm/dd/yyyy HH:MM:SS]

If you're after a GUI, /usr/openv/netbackup/bin/jbpSA in Unix (including Linux) is just equivalent to "Backup, Archive & Restore" in Windows 

you can use bplist that will listindividual files

http://www.symantec.com/docs/HOWTO43668

you can use bpclimagelist that will list what "images" the client has 

http://www.symantec.com/docs/HOWTO43770

and you can use the jbpSA GUI - that will however require a X server and the DISPLAY variable configured.