I have deleted the login keychain in user ABC which is administrator user, i remember the password. I also have a CDF user on my mac which is also administrator.
When at login I give password to ABC user, it accepts then refresh the screen again for selection of users and giving password again. If I give password to any other user system login to that users.
Is there any way to Login the ABC user by making any change to keychain via CDF user.
How did you delete the keychain of the user? If /Users/*/Library/Keychains/login.keychain exists, you could try deleting it in any case.
You could also try changing the password of the other account. Open the Users & Groups preference pane, click the lock icon, select the account, press the Reset Password... button, and enter a new password.
If /etc/kcpassword exists, you could also try deleting it. It is used to store the keychain password when automatic login is enabled.
