can anyone tell me how can i edit the .login file
 

i am trying to install qt and it says
In .login (in case your shell is csh or tcsh), add the following lines:

setenv QTDIR /usr/local/qt
setenv PATH $QTDIR/bin:$PATH
setenv MANPATH $QTDIR/doc/man:$MANPATH
setenv LD_LIBRARY_PATH $QTDIR/lib:$LD_LIBRARY_PATH
can anyone help me doin this

i would be greatful if anyone cud help me installing qt

What shell do you use?

If you use csh or tcsh then just make a file in the root of your home directory called .login. But that information in it, and log out and log back in.

If you use bash change .login to .profile.