need answers to few RHCE questions

1.What command makes sure that the DNS service starts the next time you boot Linux?
answer
#chkconfig named on
2.What file contains the kernel initialization messages?
/etc/dmesg
3.The FTP server is vsFTPd. If you want to make sure it starts the next time you boot into a standard runlevel, what command should you run?
#chkconfig vsftpd on
7.Write down the commands for the following :
a. Display your user account from the /etc/passwd file
cat /etc/passwd | grep usename
b. Find and display all the groups you belong to
#id username
4.You are using the xinetd program to start services. What command makes sure the Kerberos version of Telnet, as configured in /etc/xinetd.d/krb5-telnet, starts the next time you boot Linux? Assume the xinetd service is active.
#chkconfig xinetd on
#chkconfig telnetd on