what should i study after RHCE?
 

i am now studying RHCE. if i take CCNA along with this, is it good? Or is it better to go for RHCSS instead of CCNA?? plz help me.

Umm, they all are different certs so it really depends what your doing.
RHCSS covers different things than CCNA. CCNA deals with low-level network things and RHCSS seems to cover securing some services.
I'd get all if possible though.