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Old 09-15-2004, 04:50 PM   #1
Registered: Apr 2004
Distribution: RedHat, Fedora, Suse, Debian, Gentoo, Mandrake
Posts: 132

Rep: Reputation: 15
tcpdchk...lprm "-a"...ip_forward

Hello everyOne...

1- Is "tcpdchk" a valid command??? i saw it in a test sample but i didnt find it in my RedHat~9 what packages should I install ..?...

2- {lprm "-a" } i saw it as an answer to remove all print jobs on all configured queues on the system but also i didn't find this option "-a" with
lprm command ..

3- Could "echo 1>/proc/sys/net/ipv4/ip_forward"
let the server forward between 2 NIC's correctly configured...
actually i don't have 2 NIC's but its an answer...i want to get sure of it..
any help...???
i'm preparing to write 102 exam but cause there is no available book(FREE)
it looks difficult...
thank yOu...

Last edited by ziox; 09-16-2004 at 04:29 AM.
Old 10-13-2004, 07:32 PM   #2
Novell Adv. Tech. Training Engineer
Registered: Jul 2004
Distribution: Knoppix/Mint
Posts: 47

Rep: Reputation: 15
yes, tcpdchk is a valid command, it's from the older tcpd version of tcp wrappers. You won't find it on RH8 or 9, or anything in the last two or so years.

the difference between lprm -a and lprm all is that lprm -a removes the first print job from all configured queues, while lprm all removes all print jobs from the default queue. lprm -a all would remove all print jobs on all queues.

You sure have some, ahem, "specific" questions about the exam, yes, the string in /proc/sys/net/ipv4/ip_forward is usually 0, but if you echo a 1 in it, it will turn on ip forwarding among the attached and configured interfaces.



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