Linux

First find it
slocate sudoers
It's probably in /etc directory
vi to sudoers
and then add your users with something like this
mynewuser ALL= NOPASSWD: ALL

/sbin/ifconfig
will produce the below, and note I'm on a network.

eth0 Link encap:Ethernet HWaddr XX:XX:XX:XX:XX:B9
inet addr:192.168.1.100 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:24677 errors:1 dropped:0 overruns:0 frame:0
TX packets:24079 errors:1 dropped:0 overruns:0 carrier:1
collisions:0 txqueuelen:100
RX bytes:20491270 (19.5 Mb) TX bytes:2869058 (2.7 Mb)
Interrupt:11 Base address:0x5000

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:2775 errors:0 dropped:0 overruns:0 frame:0
TX packets:2775 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1016943 (993.1 Kb) TX bytes:1016943 (993.1 Kb)

Try
locate *.tpl | less
That way when you get a bunch of files matching your search you can step through the list. Be more specific like
locate *mod*.tpl

In case you know where to search, try
find . -name "*user*"
When in tiki directory.

Mose answers:
grep user /etc/httpd.conf

$: mv tikiwikiRCversionXXX tiki
check
$man mv for more help.