I have a question here on /etc/passwd file.
There is a user called user_a, when it is defined in /etc/passwd as below
+user_a:x:::::/bin/ksh
after user_a login, the system could not recognize the correct enviromental variable $USER_A_HOME which is defined in .kshrc file (under /home/user_a folder) as "export USER_A_HOME=$HOME"
However, if the user is defined in /etc/passwd as below
user_a:x:38029:10::/home/user_a:/bin/ksh
the system could correctly recognize $USER_A_HOME as /home/user_a
Normally, if the user is defined as user_a:x:38029:10::/home/user_a:/bin/ksh, the .profile and .kshrc file will be launched by system when user_a login.
I wonder the reason is $HOME is not defined in first setting +user_a:x:::::/bin/ksh
I don't understand the NIS system well. Here I want to know if the user_a is defined as +user_a:x:::::/bin/ksh, what will the system execute when it login.