I don't think there is a good secure way so far, but would like to have your opinion. 

If I want user to create logbook for themselves, what's the best way to do it? I guess Execute $attribute = <command> may work, have it write to cfg file, but obviously it impose security problem. Is there a good and secure way to allow user to create logbook themselves?

How do I make selection page show only list of logbooks that logged on user has access to? 

Right now, say I have 4 logbooks, and I have access to 2 of them. I turned on Protect Selection page = 1. So when I go to home page, I need to logon first, then I am given selection page. I am given list of 4 logbooks, I can only click into 2, which is expected.  

Instead of given list of 4 logbooks, I would like to know if there is a way to make selection page only contains 2 logbooks which I have access to?

Just look in the documentation for "preset text = ...". 

I would like to set up the text are as a template. The documentation indicates this can be done however I am unable to find reference to how it is accomplished.

 It's resolved.  I read the documentation again, and found out my mistake. I didnt have username defined on password file. 

I forgot to mention, I also have Password file line in elogd.cfg file. Because without password file line, I wouldn't get login screen. I know my test account is not in the main.pwd file. I believe elogd does go to kerberos server to compare password. I just don't get why I get invalid username and password when I entered correct password, while kerberos error (expected) when I enter wrong password.  

Authentication = Kerberos

Kerberos Realm = xxx

Password file = main.pwd

Hello, I have

authentication = kerberos

kerberos Realm = xxx

I ran tcpdump and know elogd server did attempt to contact kerberos server. I could run kinit username@realm_name, and klist shows my ticket fine. 

I receive "kerberos error 256: Decrypt integrity check failed. Please check your kerberos configuration" when I entered my password wrong purposely on login page.

I receive "Invalid user name or password!' when I entered my correct password. 

Please advise. 

No this is not right. Better read the manual carefully, then come back here again.