topic Re: pinging localhost in Operating System - Linux

pinging localhost

ROSS HANSON — Fri, 25 Jul 2003 16:42:18 GMT

I have two RedHat linux boxes. On one I can do a "ping localhost" with no problems. The other I cannot. I copied the /etc/hosts file from the good box to the bad. Of course, I changed ips and names. I am still unable to do a ping localhost on the bad box. I can ping any other box on our network by name but still not localhost.
I can ping 127.0.0.1 on the bad box but I am also unable to ping loopback

Where else should I be looking?

Re: pinging localhost

Dan Beeler_1 — Fri, 25 Jul 2003 16:49:43 GMT

Sounds like you may have an error in the /etc/hosts file. I would verify that localhost is typed correctly.

What do you get when you run an ifconfig -a?

You should see something for lo

if it doesn't show this interface, then you should activate the service "local" in your "setup->system services".

Re: pinging localhost

Steven E. Protter — Fri, 25 Jul 2003 17:41:12 GMT

Proper ifconfig -a output for localhost

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:202602 errors:0 dropped:0 overruns:0 frame:0
TX packets:202602 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:27171273 (25.9 Mb) TX bytes:27171273 (25.9 Mb)

take a look at /etc/hosts he should list the local box first.

compare these files on the servers
/etc/sysconfig/network-scripts/ifcfg-lo

SEP

Re: pinging localhost

Caesar_3 — Fri, 25 Jul 2003 18:29:39 GMT

Hello!

First could be problems in your /etc/hosts
file (bad entrys)
Create new file.
Also could be that you don't have read permision on the /etc/hosts
Check the permitions (should be -rw-r--r--)

Caesar

Re: pinging localhost

ROSS HANSON — Fri, 25 Jul 2003 20:56:50 GMT

Here is my /etc/hosts file:

127.0.0.1 linux localhost.localdomain localhost

the permissions on the file are
-rw-r--r-- 1 root root 43 Jul 25 14:52 /etc/hosts

Re: pinging localhost

tpfraz — Sat, 26 Jul 2003 03:47:58 GMT

Hi Ross,
Try removing the word "linux" from your hosts file. So that it reads
127.0.0.1 localhost.localdomain localhost

Thats the "IP", the "hostname", and the "alias".

Re: pinging localhost

Caesar_3 — Sat, 26 Jul 2003 13:00:26 GMT

Hello!

Check if you can ping linux (ping linux)
if so then put the localhost wright after the
ip address.

Caesar