CentOS 5 Server :: Using ISP With DCP - Unknown Host
Mar 24, 2010
I am using comcast ISP with DHCP.
When I type in hostname -f it says unknown host
in /etc/sysconfig/network
hostname=servix.example.com
in /etc/hosts
127.0.0.1 servix.mydomain.com localhost localhost.localdomain
192.168.1.101 example.com www.example.com
in /etc/resolv.conf
search servix.mydomain.com
COMCAST SNS SERVERS
nameserver 192.168.1.1
In linksys router I have host as servix and domain as example.com. So why is it returning unknown host?
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Sep 8, 2009
Many of mails sent from my mail server that are in Queue;The main reason is deffered by domains like yahoo,aol,etc.but there is one more error that i keep getting and that is Host Unknown,Below is an example from mail log,The catch is,test mail sent on the same email id sent from my personal mail from the same server i.e. url was deliveredHowever,another mail containing client information sent from customercare@mycompanysdomain ended up in queue.
There are more examples of the same,around 20 domain have the same problem.
Sep 7 14:33:46 server2 sendmail[24591]: n8793jiC024589: to=<abc@xyz.fi>, delay=00:00:00, xdelay=00:00:00, mailer=esmtp, pri=163672, relay=xyz.fi., dsn=5.1.2, stat=Host unknown (Name server: xyz.fi.: host not found)
Sep 7 22:09:42 server2 sendmail[6407]: n87Gdffa006403: to=<abc@def-fgh.com>, delay=00:00:00, xdelay=00:00:00, mailer=esmtp, pri=152474, relay=def-fgh.com., dsn=5.1.2, stat=Host unknown (Name server: def-fgh.com.: host not found)
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Mar 22, 2011
why no matter what email I send to a user I get this error relay1 postfix/local[4023]: 75941291D4: to=<username@domainname.com>, relay=local, delay=0.14, delays=0.07/0.02/0/0.05, dsn=5.1.1, status=bounced (unknown user: "username")
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May 5, 2010
I tried posting this before and I'm not sure what happened but I don't think it worked, so if it did please forgive the double post.am very very new to centOS and linux in general. I just want to setup a test web server that more closely mirrors our actual web server that is hosted by rackspace. I've installed centOS and tried to setup Apache, PHP and MySQL from a guide on the web using Yum. When I go to localhost in the web browser I'm able to see the default apache page. However when I create a php page it's just blank.When I look at the apache error logs I get this: PHP Warning: Unknown: failed to open stream: Permission denied in Unknown on line 0
I've been searching alot on the internet and I know the issue is permission related, but I don't know how to fix it. I've seen some forum posts that say you need to use the chmod 775 command on the /var/www/html folder.Currently when I do ls -l /var/www/html it returns
-rw------- 1 root root 19 May 5 13:16 index.php
-rw------- 1 root root 19 May 5 13:15 index.php~
I'm sure that this isn't correct but like I said I don't know much about how to set permissions or who the owner needs to be. I've done alot of searching and seen similar posts, but no one seems to explain it clearly.
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Jan 28, 2009
I updated bind to version bind-9.3.4-6.0.3.P1.el5_2 today, and then I started getting "Starting named: named: user 'named' unknown" messages. Selinux is enabled.
ID named shows:
uid=25(named) gid=25(named) groups=25(named) context=root:system_r:unconfined_t:SystemLow-SystemHigh
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Jan 15, 2010
I am installing ISPconfig on a Ubuntu server 9.10. When i write hostname -f i get the unknown host message.
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Apr 13, 2009
Trying to get a handle on xen. I have installed Centos 5.3 and I have created one xen guest using default 192 address. I can access this guest no problem from the xen host/server but how do I setup a bridged (I assume) xen guest so it can be connected from any network within my domain, The xm host is network is 10.32.161.0
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Jul 25, 2011
When I open Konqueror, on Fedora 15 KDE, it opens to the default Start Page just fine. When I try to visit any other website, it gives me an Unknown Host Error. The documentation I found for KDE just said that if I get that error, it means that either the website does not exist or I am not connected to the internet, but I'm quite sure I'm connected to the internet.
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Jan 8, 2010
I can lookup DNS hostnames with dig and nslookup, but nothing else seems to be able to resolve anything. ping, telnet, Firefox, everything gets "unknown host".
For example:
> dig yahoo.com
; <<>> DiG 9.6.1-P2 <<>> yahoo.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 20438
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 13, ADDITIONAL: 0
;; QUESTION SECTION:
;yahoo.com.INA
;; ANSWER SECTION:
yahoo.com.17579INA209.131.36.159
yahoo.com.17579INA209.191.93.53
yahoo.com.17579INA69.147.114.224
;; AUTHORITY SECTION:
.10071INNSL.ROOT-SERVERS.NET.
.10071INNSI.ROOT-SERVERS.NET.
.10071INNSH.ROOT-SERVERS.NET.
.10071INNSF.ROOT-SERVERS.NET .....
> ping yahoo.com
ping: unknown host yahoo.com
> ping 209.131.36.159
PING 209.131.36.159 (209.131.36.159) 56(84) bytes of data.
64 bytes from 209.131.36.159: icmp_seq=1 ttl=55 time=97.2 ms
64 bytes from 209.131.36.159: icmp_seq=2 ttl=55 time=98.9 ms
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Apr 5, 2010
I am using ubuntu 9.10 and I still cannot figure out this thing. I work behind a proxy managed by my university. Now, I cannot ping the other users on my network although they can ping me. Not to mention, I also cannot ping [URL]... It says : ping: unknown host [URL]... But I can ping the proxy server.
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Feb 5, 2009
how to turn my computer on and browse the web. I want to host my website form my computer, only problem i don't now how to do it. It will take some time for me to understand this Os. (For now) My question is Can i use xampp linux to host my website using the security of centos. i now how to use xampp but i don't now how to use centos.? try reading around but i connot event find the yum program use to install softwares.
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May 25, 2010
I installed ntop on our server, after installing it, i ran ntop as a daemon. shortly after we lost the ability to ssh into the server.tried restarting ssh, but it didn't work, so had to restart the entire server.Where should we look to find why ssh suddenly stopped?
the error ssh gave when we try to connect was like: ssh: no route to host what log files should i look at and what should i look for to find the cause of the error?
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Sep 2, 2010
I'm having some trouble mounting an NFS share on a VM host (both CentOS 5.5):
-------------------------
SAN/NAS BOX (NFS Server):
-------------------------
/ filesystem on VolGroup00/LogVol00 = 7.6GB A 20GB filesystem on vg_vm/lv_vm1 is mounted at /srv/vm1 A 100GB filesystem on vg_vm/lv_data1 is mounted at /srv/data1
Output of 'df -h' (extraneous stuff removed):
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
7.6G 1.8G 5.5G 25% /
/dev/mapper/vg_vm-lv_vm1
20G 173M 19G 1% /srv/vm1
/dev/mapper/vg_vm-lv_data1
99G 188M 94G 1% /srv/data1
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Feb 1, 2011
I'm setting up apache on centOS 5.5 and administering it from another host on my LAN(this web server has no Xorg). I can ping from the config host to the web server but not the other way. My network is quite a way from being set up so i'm just configuring the web server at the moment, the simplest way i can. It's just trying to get two LAN hosts both with 192.168.1.0/24 I.Ps to talk to each other using a router to connect them.
Here are the outputs of ifconfig and netstat -rn for the web server, the config host and the router:
The ifconfig -a and netstat -rn of the config host are:
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
inet6 ::1 prefixlen 128
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
[code]....
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Jun 13, 2011
I have a P2000 array from HP. What I did try to do was to expand vdisk and corresponding volume. After expanding finished i saw it expanded on management tool for array but it did not expand on host. I tried to rescan devices using pvcsan, rescan-scsi-bus.sh and so on. I tried to restart the host and it did not help neither. It's two node cluster with clustered lvm volume group which is causing the problems.
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Aug 10, 2010
this issue which has suddenly occurred on both my Desktop and my Laptop. When I try to configure an IP address to any interface I get the following error....
uadmin@Ubuntu:~$ ifconfig br0 addr 192.168.10.1/24
addr: Unknown host
ifconfig: `--help' gives usage information.
uadmin@Ubuntu:~$
I get this for ethernet interfaces as well. I do not understand what is different as I was able to configure the ip address only the day before yesterday on the laptop..? The Desktop has had this issue for about 3 weeks now.
br0 Link encap:Ethernet HWaddr 32:70:40:91:06:25
inet6 addr: fe80::3070:40ff:fe91:625/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
[Code]....
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Dec 5, 2009
I am a novice with linux but I pick up stuff pretty quick so far I have been able to figure everything else out except this, I have read all the documentation on apache 2 and getting virtual hosts to work and it appears I have everything setup right but yet I still can't get it to work, I have googgled my brains out and I still can not figure out whats going on here is my setup.I have two websites that I am trying to get to load[URL]I have webmin installed and I'm using their utilities to setup virtualhost. heres how it looks in my http config:NameVirtualHost 24.189.245.44:80 ( I have tryed * in place of my external ip)
<VirtualHost *:80>
DocumentRoot /var/www/html/gamerbreed
ServerName gamerbreed.com
[code]....
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Dec 29, 2009
I have setup CentOS 5.2 with Nagios to monitor my network and have that configuration almost done. I have also setup Sendmail to forward all mail (really only Nagios notifications) out to my Exchange server using define('SMART_HOST', 'exchange.domain') in the sendmail configuration file and it seems to be working correctly.is there a way to configure Sendmail to forward all mail out through my Exchange server as it is now but send mail out to the internet itself if the exchange server is unavailable, somewhat like a failover configuration.
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Mar 21, 2011
I installed bind & did not install chroot. I set up a fictional domain kelly.local. I am able to resolve FQDN (example: angus.kelly.local) in both dig & nslookup & ping on linux boxes.
I want to be able to resolve bare host names (example: angus) using bind. I get mixed results.
(1) linux boxes resolve bare host names & FQDNs just fine using nslookup & ping, but not dig. dig gives error:
; <<>> DiG 9.3.6-P1-RedHat-9.3.6-4.P1.el5_5.3 <<>> angus
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 15241
[Code]....
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Mar 23, 2009
I installed Gnome on my server by when I run
Code:
[root@F026 ~]# startx
Code:
hostname: Unknown host
xauth: creating new authority file /root/.serverauth.2915
X.Org X Server 1.5.3
Release Date: 5 November 2008
X Protocol Version 11, Revision 0
Build Operating System: Linux 2.6.18-128.1.1.el5 i686
[code]...
I don;t have physical access to the system and it is a server located in Europe. Fedora release 10 (Cambridge) is installed in it.
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Dec 4, 2010
I've encountered a problem after doing a fresh install with xubuntu 10.10 (2.6.35-23-generic).some sites are blocked like [url]....if I do dig [url]....- I receive the A, CNAME records and the IP address and everything.when ping[url].... - I receive 'unknown host'.when ping <theipaddress> - I receive responses
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Nov 24, 2010
I want to find out my IP and I test this code from beej tutorial:
Code:
char hostname[128];
int i;
struct hostent *he;
struct in_addr **addr_list;
struct in_addr addr;
gethostname(hostname, sizeof hostname);
printf("My hostname: %s
", hostname);
he = gethostbyname(hostname);
if (he == NULL) { // do some error checking
herror("gethostbyname"); // herror(), NOT perror()
return 1;
} // print information about this host:
printf("Official name is: %s
", he->h_name);
printf("IP address: %s
", inet_ntoa(*(struct in_addr*)he->h_addr));
printf("All addresses: ");
addr_list = (struct in_addr **)he->h_addr_list;
for(i = 0; addr_list[i] != NULL; i++) {
printf("%s ", inet_ntoa(*addr_list[i]));
}
printf("
");
return 0;
But my output is this:
Code:
My hostname: vBx
gethostbyname: Unknown host
I heard that it works in windows, why isn't working in linux?
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Feb 11, 2010
My problem is that I can't setup a diskless environment with CentOS 5.4 (server) and CentOS 3.9 (hosts). On the host, I've recompiled the CentOS 3.9 kernel, with these mods:
- added kernel level IP autoconfiguration;
- added NFS file system support;
- added Root file system on NFS;
- added e1000 driver (the host has a gigabit network card);
Then, I have followed the guide at this link: [URL]
But in my dhcpd.conf I'he put other parameters:
ddns-update-style interim;
allow bootp;
allow booting;
subnet 192.168.195.0 netmask 255.255.255.0 {
range192.168.195.70 192.168.195.90;
option routers192.168.195.254;
option subnet-mask255.255.255.0;
option domain-name"lnf.infn.it";
option domain-name-servers192.168.195.254;
option time-offset-18000; # Eastern Standard Time
default-lease-time21600;
max-lease-time43200;
filename"linux-install/pxelinux.0";
next-server192.168.195.254;
}
host dante79 {
option host-name"dante79";
hardware ethernet00:20:38:01:C3:7C;
fixed-address192.168.195.79;
}
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Nov 10, 2010
i have linux server application based on centos 5 that run httpd daemon from /usr/local/pf/conf/httpd.conf which is generated from the /usr/local/pf/conf/templates/httpd.conf.apache22 file
the problem is every time i run my linux server application i am not able to access phpmyadmin unless i stop my linux server application which is stop it httpd daemon then start "service httpd start"
i have been told by forum moderator to create an alias for my phpmyadmin in Virtual Host but it stil dont work, i am not able access my phpmyadmin site
this is what i have done to solve this problem
- open /usr/local/pf/conf/templates/httpd.conf.apache22 file then look for <VirtualHost *:%%admin_port%%>
- add Alias /phpmyadmin "/usr/share/phpmyadmin" (Failed)
- add Alias /phpmyadmin /usr/share/phpmyadmin (Failed)
- add Alias /phpmyadmin "/usr/share/phpmyadmin/" (Failed)
[Code]....
NB : my phpmyadmin is install on /usr/share/phpmyadmin with /etc/httpd/conf.d/phpmyadmin.conf as phpmyadmin configuration file
why i still cant open my phpmyadmin site ? or why i cant run phpmyadmin together with my linux server application because it use the same daemon (httpd daemon)
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Dec 18, 2010
I'm trying to setup sendmail to use my gamil account as a mail relay but with no success. I followed these guides: [URL]and many others.my machine is a centos 5.5 vm running under opensuse host. ( I hope that its not just a virtualbox problem..)
I ended up with this setup:
/etc/mail/auth/client-info:
AuthInfo:smtp.gmail.com �U:root� �I:xxxxxx� �P:xxxxxx� "M:PLAIN LOGIN"
AuthInfo:smtp.gmail.com:587 �U:root� �I:xxxxxx� �P:xxxxxx� "M:PLAIN LOGIN"
[Code].....
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Jan 14, 2011
I have installed centOS Server edition on my laptop and installed apache and mysql on server, i wanted to understand how can i make my server on line and host my website on my own server. I am using MTNL Broad band, and i have one static ip, How to make web server in centOS 5.5.
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Jan 22, 2010
I'm having an issue configuring eth0. I'm using ubuntu 8.10 in a virtual machine (VirtualBox). The correct adapter is being used and it has worked in the past. I've tried placing eth0 in dhcp through the GUI and bash, but always get a 169 address or 127.
When I run the following command:
Code:
The output is:
Code:
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Jun 23, 2010
I am trying to set up samba in my CentOS virtual machine that is running on a Windows 7 host. I have found a tutorial in the How-Tos on this site but I'm not sure if they are exact and I'm paranoid about messing something up. The link to the tutorial is below. Is there anything that I should do different or anything that I should be aware of? Also, once this is set up, how do I transfer files between the two machines?
[URL]
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Jun 7, 2011
Tearing my hair out on this one a little bit, having problems sending message from web based PHP form to user inbox.I keep getting: Undelivered Mail Returned to Sender<me@mydomain.co.uk>: Host or domain name not found. Name service error for name=mydomain.co.uk type=A: Host not found.Running these commands:
$ hostname = mydomain.co.uk
$ hostname -f = mydomain.co.uk
$ postconf -n =
[code]....
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Aug 19, 2009
I've setup vsftpd correctly and it's running fine with local users (in the same LAN). However, when remote users wanna login to the server, it takes more than 1 minute to get in. Users do can login from remote. It just took too long. (It prompted for the username and password very fast.) Since the server is behind a router, I did configure the port forwarding for TCP 20-21. The centos version is 5.3. The vsftpd is v2.0.5.
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