Code:

# ls -l
total 10
-rw-r--r--   1 dummy2   other        140 Jun 19 21:37 local.cshrc
-rw-r--r--   1 dummy2   other        136 Jun 19 21:37 local.cshrc~
-rw-r--r--   1 dummy2   other        157 Jun 19 21:37 local.login
-rw-r--r--   1 dummy2   other        178 Jun 19 21:37 local.profile
-rw-r--r--   1 dummy2   other        174 Jun 19 21:37 local.profile~
# pwd
/usr/users/dummy2
#

i know .profile is loaded automatically when user logs into his account. what is the user of the remaining files that i have mentioned. i tried to remove all the files. and then logged in back . i saw all files gone but .profile file was automatically created..

My doubt

1. what is the use of each file mentioned above? do we really need it?
2. How the .profile file is created automatically?