About UNIX shell differences and overview pls read
THIS And about .profile, .login files, these files are located in user's home directory, which is most probably /home/username, list the contents of user's home directry with ls -a and you can see these files there. And which file to modify, its very simple not so complex, check the login shell of user with command:
Code:
cat /etc/passwd | grep username
admin:x:101:1:Tayyab:/home/username:/usr/bin/ksh
Last field tells you the login shell of the user, in case of ksh, bash or sh you have to modify .profile to set the path and in case of csh it is .login.
Hope it helps!
Best Regards,
Tayyab