topic Re: hostname in Operating System - HP-UX

hostname

Sajjad Sahir — Sun, 27 Jan 2008 17:23:57 GMT

I can ping ip address but not pinging hostname

Re: hostname

Hasan Atasoy — Sun, 27 Jan 2008 17:57:13 GMT

hi saijad ;

if you cannot ping the server fromyour client ; then you cannot resolve the hostname,

1. register that hostname in dns
or,
2. write hostname ip to your client hosts table.

Hasan.

Re: hostname

Sajjad Sahir — Sun, 27 Jan 2008 18:58:14 GMT

hasan already hostanme is in hosttable

i checked it from windows o/s i am pinging
my server but i can ping only ip not hostname
i checked hosname in /etc/hosts file also
i checked /etc/nsswitch.conf file
entry is perfectly ok

but i am not getting what was the reason yet
it is very urgent to me
pleaseeeeeeeeeeee

Re: hostname

Hasan Atasoy — Sun, 27 Jan 2008 19:19:23 GMT

are you trying to ping your unix server from your pc ? or vice versa ?

Hasan

Re: hostname

Bill Hassell — Sun, 27 Jan 2008 21:03:28 GMT

The hostname is just another way to refer to the IP address. In HP-UX, a hostname is run through the resolver routines in the C library. There are several ways to obtain the translation. /etc/hosts is the simplest but there are two optional files that tell the resolver how to work. The first is /etc/resolv.conf. If it exists and had 1 to 3 IP addresses for working DNS servers, then the resolver will look at the second optional file called /etc/nsswitch.conf. If this file does not exist (there are several templates but only nsswitch.conf counts) then /etc/hosts is ignored. If your hostname is not in the DNS server, then no IP address is returned and ping has no address to use.

The hosts: line in the nsswitch.conf should read:

hosts: files [NOTFOUND=continue UNAVAIL=continue] dns

That way, if the new hostname is put into /etc/hosts, will be resolved. User the nsquery command to see how a hostname is resolved:

nsquery hosts somehostname

Re: hostname

TTr — Mon, 28 Jan 2008 12:37:17 GMT

> i checked it from windows o/s i am pinging
> my server but i can ping only ip not hostname

> i checked hosname in /etc/hosts file also
> i checked /etc/nsswitch.conf file
> entry is perfectly ok

The windows PC can not resolve the hostname of your UNIX server. You need to put the hostname/IP of the UNIX server in the name resolution service that your PC is using.

Your PC could be using a DNS server or a WINS server for name resolution.

On the PC open a CMD window (DOS window) and run the command "ipconfig /all" and look at the lines for "DNS servers" "Primary WINS server" "secondary WINS Server"

If any of those are defined, you have to put the UNIX hostname/IP in those servers so that your PC can resolve the UNIX hostname.

Re: hostname

Sajjad Sahir — Mon, 28 Jan 2008 17:16:37 GMT

hasan yes

i am pining from my pc to unix server

Re: hostname

Tim Nelson — Mon, 28 Jan 2008 17:41:40 GMT

If you are pinging from PC then you need to check or have a DNS entry on the DNS server that your PC is configured to query.

ipconfig/all from cmd prompt will tell you where your DNS server is. Ask the admin of that server to add your FQDN to that server.

Re: hostname

Safarali — Thu, 31 Jan 2008 07:14:47 GMT

sajjad,
what is the output of the nslookup
nslookup hostname

you need to put /etc/resolv.conf file on your system please provide the output of
/etc/resolv.conf and /etc/nsswitch.conf

Regards
Safar

Re: hostname

Sajjad Sahir — Sat, 02 Feb 2008 06:24:50 GMT

this is the output of resolv.conf file and the nsswitch.conf file

and nslooup ip output is also u can see below

# cat /etc/resolv.conf
nameserver 10.65.60.100

# nslookup 10.65.65.11
Using /etc/hosts on: society1

looking up FILES
Name: society1
Address: 10.65.65.11

# cat /etc/nsswitch.conf
#
# /etc/nsswitch.hp_defaults:
#
# @(#)B11.23_LR
#
# An example file that could be copied over to /etc/nsswitch.conf; it
# uses NIS (YP) in conjunction with files.
#

passwd: compat
group: compat
hosts: files [NOTFOUND=return] nis [NOTFOUND=return]
ipnodes: dns [NOTFOUND=return] files
networks: nis [NOTFOUND=return] files
protocols: nis [NOTFOUND=return] files
rpc: nis [NOTFOUND=return] files
publickey: nis [NOTFOUND=return] files
netgroup: nis [NOTFOUND=return] files
automount: files nis
aliases: files nis
services: nis [NOTFOUND=return] files
#

Re: hostname

Bill Hassell — Sat, 02 Feb 2008 15:05:20 GMT

> i am pining from my pc to unix server

OK. All the information about nsswtch.conf and nslookup have nothing to do with your PC. These directions are only for pinging from your HP-UX server to another location. You need to contact your network or WINS/DNS administrator and ask that your HP-UX server's hostname be added. That way, your PC will then know the server's hostname. You can also edit the PC's hosts file but that may be bypassing a process in your company for maintaining all the host names.

I noticed in your HP-UX nsswitch.conf file that it is using NIS, a centralized server containing a lot of network information. Perhaps the administrator of the NIS server can help with WIND/DNS for your PC.

Re: hostname

sachit patil — Sat, 02 Feb 2008 21:26:25 GMT

Hi you have to add entry in hosts file of windows
ip address hostname

start -> search > hosts* > edit file and insert entry >save

After u can ping ur hostname.

Regards
sac

Re: hostname

Sajjad Sahir — Sun, 03 Feb 2008 07:37:35 GMT

through telnet from my system i can ping ip address but not hostname so I checked all these files why I can't ping the hostname
I am pinging from my windows o/s system

this is the output of resolv.conf file and the nsswitch.conf file

and nslooup ip output is also u can see below

# cat /etc/resolv.conf
nameserver 10.65.60.100

# nslookup 10.65.65.11
Using /etc/hosts on: society1

looking up FILES
Name: society1
Address: 10.65.65.11

# cat /etc/nsswitch.conf
#
# /etc/nsswitch.hp_defaults:
#
# @(#)B11.23_LR
#
# An example file that could be copied over to /etc/nsswitch.conf; it
# uses NIS (YP) in conjunction with files.
#

passwd: compat
group: compat
hosts: files [NOTFOUND=return] nis [NOTFOUND=return]
ipnodes: dns [NOTFOUND=return] files
networks: nis [NOTFOUND=return] files
protocols: nis [NOTFOUND=return] files
rpc: nis [NOTFOUND=return] files
publickey: nis [NOTFOUND=return] files
netgroup: nis [NOTFOUND=return] files
automount: files nis
aliases: files nis
services: nis [NOTFOUND=return] files
#

Re: hostname

Bill Hassell — Sun, 03 Feb 2008 19:09:17 GMT

As mentioned before, there is no problem with your HP-UX server. All those HP-UX files do not have anything to do with your PC. Your PC knows nothing about this hostname. Therefore, only the IP address will work. You have to configure your PC to translate the hostname into an IP address. The exact location of the hosts file depends on your version of Windows but for XP, the file is:

C:\WINDOWS\system32\drivers\hosts

Just add your hostname to that file, like this:

12.34.56.78 myhostname

This is strictly your PCs configuration. Nothing needs changing in the HP-UX system.

Re: hostname

Dennis Handly — Mon, 04 Feb 2008 07:11:56 GMT

>Bill: The exact location of the hosts file depends on your version of Windows but for XP, the file is:
C:\WINDOWS\system32\drivers\hosts

On my XP it is:
C:\WINDOWS\system32\drivers\etc\hosts
(There are a bunch of other UNIX style networking files there too.)

Re: hostname

Sajjad Sahir — Tue, 05 Feb 2008 07:54:05 GMT

thank u bill Hassel I edited and got it

thank u once again? one more clarification

suppose more peoples are using from their own pc then we have to manually edit in all pcs?

sajjad

Re: hostname

Dennis Handly — Tue, 05 Feb 2008 08:34:28 GMT

>then we have to manually edit in all PCs?

It was mentioned several times that if you can set up a DNS server with those FQDN/IP mappings, then everyone can access those machines.

Re: hostname

Sajjad Sahir — Tue, 05 Feb 2008 11:33:39 GMT

Dear Dennis

I have four unix servers I ddin't edit /etc/hosts files in windows

but i can ping hostname in 2 servers they are hp_da1 and hp_da2

but my problem is i can' tping hostname
in the other two

without editing anything in windows i can ping hostname of two servers and i can't ping hostname of two servers how to manage it
if i am editing in windows /etc/hosts file
every system i can ping wiht hostname no problem but in unix platform how i can manage these issue in my two servers

Re: hostname

Dennis Handly — Tue, 05 Feb 2008 11:42:16 GMT

>but i can ping hostname in 2 servers they are hp_da1 and hp_da2

Are they on the same subnet and the other two aren't?
Were only two added to the DNS before?

Re: hostname

TTr — Tue, 05 Feb 2008 12:24:24 GMT

You need to get a basic understanding about what name resolution is and where it occurs and how to set up every host (windows or unix) to use that name resolution. I think I gave you the answer in the 5th reply above and Dennis above is telling you the same thing
-oo-