Networking :: Nslookup And Display All The Aliases For A System?
Nov 10, 2010
Not really a linux specific thing I have gooled the heck out of it and tried nslookup -a and a few other options nothing gets me what I need. The question is I have a machine with several aliases in dns. How do I do a nslookup and display all the aliases for a system.
I am trying to see if something it aliased correctly but i cannot list all the names a system is know by.
I am sure its something simple I am missing with a switch.
I am not so experienced with networking in Linux. I've successfully installed Red Hat Linux Enterprise 5.2 on a VMware host. When I issued nslookup command, it returns "connection timed out" error as follows:
Code: [root@rac1 ~]# time nslookup rac1 ;; connection timed out; no servers could be reached real 0m15.038s user 0m0.000s sys 0m0.000s
My questions are: (1) Is that error normal? (2) Is there a way to decrease the 15.038s value? rac1 is the local hostname, so why it takes all that time to resolve it.
Following info may help: Code: [root@rac1 ~]# hostname rac1.mydomain.com [root@rac1 ~]# cat /etc/hosts # Do not remove the following line, or various programs # that require network functionality will fail. 127.0.0.1 localhost.localdomain localhost #eth0 - PUBLIC 192.0.2.100 rac1.mydomain.com rac1
[root@rac1 ~]# ping -c 4 rac1 PING rac1.mydomain.com (192.0.2.100) 56(84) bytes of data. 64 bytes from rac1.mydomain.com (192.0.2.100): icmp_seq=1 ttl=64 time=0.015 ms 64 bytes from rac1.mydomain.com (192.0.2.100): icmp_seq=2 ttl=64 time=0.029 ms 64 bytes from rac1.mydomain.com (192.0.2.100): icmp_seq=3 ttl=64 time=0.029 ms 64 bytes from rac1.mydomain.com (192.0.2.100): icmp_seq=4 ttl=64 time=0.029 ms --- rac1.mydomain.com ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3000ms rtt min/avg/max/mdev = 0.015/0.025/0.029/0.007 ms
but I tried to resolve all forms and failed. Want to add some aliases to my system, I put the snippet below in my /etc/profile but nothing happened. Also tried to put in ~/.profile and ~/.bashrc but nothing worked.
What am I doing wrong? ## /etc/profile # Section my own aliases alias cp="cp -ip" alias mv="mv -i" alias rm="rm -i" alias grep="grep --color -i"
I'm finding that I can not resolve .local domains anywhere except with nslookup and found on the LucidLynx release notes that there is a problem with avahi causing this. Although the avahi service is convenient for locating printers and such can anyone else tell me what other services/options will be impacted on a default installation of Ubuntu if I disable this service?
I'm trying to find a command to tell nslookup, "I want you to try to resolve hostname X using DNS server Y, and if the lookup fails, just output failure do NOT fail over to some other DNS server as a backup and use it to try to resolve the same hostname."I'm trying to follow the man page instructions for doing this, but it doesn't seem to work. The man page for nslookup on my system (CentOS 5.5) includes the line:
"[no]fail Try the next nameserver if a nameserver responds with SERVFAIL or a referral (nofail) or terminate query (fail) on such a response."But if I try using that option, the output seems to indicate that after the lookup failed on ns1.afraid.org, nslookup failed over to 208.67.220.220 (the first nameserver listed in my resolv.conf -- an OpenDNS nameserver) and used it to resolve the hostname instead.
Recently I installed RedHat Enterprise 5 on a windows machine. The machine is configured to use DHCP, but I have been seeing some strange behavior if I do nslookup on the machine's IP:
[someuser@lin01 mydir]$ nslookup 10.5.x.x Server: 10.10.x.xx Address: 10.10.x.xx#53 x.x.5.10.in-addr.arpa name = xyz.something. x.x.5.10.in-addr.arpa name = lenovo-d1690047. x.x.5.10.in-addr.arpa name = pqdlds. x.x.5.10.in-addr.arpa name = lin01.mydomain.com.
Where only the last entry of [URL] is actually correct, how can remove the other entries? I spoke to my IT Manager and he cannot see these stale entries in the DNS (we are using windows AD)
My system is F13 (upgraded from F11) with all of the latest patches available. I haven't gone through and combined all of the rpmnew configuration files, but none of them seem to address networking.I'm trying to get subinterfaces (secondary IP addresses) to work in Fedora 13. So far, I have been able to configure them on the command line, but not to get them to persist on booting.My base address for the NIC is: A.B.C.254. It is statically assigned.
let me show you my config and tell me if its ok Its pretty simple: eth2 -> 192.168.1.0 eth2:0 ->192.168.50.0 eth1 and eth0 are the net interfaces, 1 router each to provide wan failover (not implemented here)
1) Is the hosts file required? 2) I guess I need doing masq from local to each external, and also from local to local even if they share the same interface, hence the eth2 eth2 in the masq file... 3) So is shorewall well implemented in these scripts to handle aliases?
I have a webserver setup, where i need the server to have multiple eht:0 aliases in order to do some SSL-vhosting and other stuff.
The servers eh0 is set up in /etc/network/interfaces (its an Ubuntu)
And i have added the eth aliases with : ifconfig eth0:1 123.231.213.123 up command.
This works great, i can use the additional IP�s for the SSL-vhosts, and all is good.
My problem now is that while the server itself has 1 IP, (and approx 20 IP on alias interfaces) it uses random (i think) IPs when it is to connect to other servers. E.g the main problem is that if a Vhost on the server sends out an email, the server uses a wrong IP in the headers. Thus making it seem like the email is coming from another IP than then on the Vhost it�s currently residing.
Currently, when the server connects to its smarthost in order to deliver emails, It connects from the IP that is bound to the eth0:0 interface, and not the IP bound to eth0 which is desired.
The question now is how do I sort out the IP�s so that all connections the server makes as a client, will use the first (Eth0) IP ?
And all the extra IP-adresses will only be used as "server addresses" not to make client requests.
I have a Windows 7 professional x64 pc that intermittently fails to resolve host aliases. The nameserver is a Fedora 11 system running bind 9.6.2-p2. Its cannonical name is trixter.intranet.org, and it serves several web sites, each with a different host alias: hg.intranet.org, svn.intranet.org, bugzilla.intranet.org, etc.
Occasionally, the Windows pc will be unable to find any of the aliased hosts, even when it can find the canonical name. The aliases will be un-resolvable for a period of several minutes, and then, with no intervention, they can be found again. Trixter can always resolve the aliases to itself.
Even stranger, when I use Cygwin from the problematic Windows 7 PC, it CAN resolve the hosts. I can ping hg.intranet.org from a Cygwin shell, but not from a cmd.exe window. Administrator privileges make no difference.
I did not have any /etc/X11/xorg.conf, so I read on these forums that system-config-display would create one for me. I ran system-config-display and it created an xorg.conf. But now my display is all messed up!! So, I deleted the xorg.conf and nothing changed. Why on earth would the display still be messed up if I deleted the file that was causing it?? Does system-config-display change somethign else?
Have Fedora 11 running fine on my multi-Opteron system - but have stumbled into a problem which *might* have some significance (since it might relate to other system functions).When I tried to use nslookup (get the same error with dig, btw), I get the following error message:nslookup: error while loading shared libraries: liblwres.so.50: cannot open shared object file: No such file or directoryMy *guess* is that this is a bind-libs error, but I'm brushing up against the extent of my personal knowledge-base on this one.
I am trying to find IP address. In a socket programming tutorial, I found :
Code: $ nslookup localhost command. It gives me a address. However, one colleague told me :
Code: $ ifconfig
It also returns me inet_addr. But both are different. Kindly tell me the correct method to find IP address? I have also checked the /etc/hosts file but it says "localhost"
Don't work nslookup from clients guest OS.I have LinuxMint 7 and I'm installed VirtualBox on her. I created three guests OS. Two CentOS and XP
Name The first CentOS linux1.starline.ca The second CentOS centos.starline.ca The third XP xp2.starline.ca[code].....
On the clients guest OS nslookup don't work. It write : timed out; no servers could be reached .What is going on? Why nslookup don't work from clients guest OS?On client machine in the file /etc/resolv.conf have record ameserver 168.135.88.2
I have configured an instance in AWS EC2. I am trying to set the display back so I can run x apps. I login using ssh -xy -i...
export DISPLAY=XXX.XXX.X.XXX:0.0 echo $DISPLAY to verify xhost + xhost: unable to open display "XXX.XXX.X.XXX:0.0"
I have commented out nolisten tcp as suggested HERE I have modified /etc/gdm/custom.conf as suggested HERE Actually, the last suggested modifying /etc/gdm/gdm.conf, but that file didn't exist, so I added the line: DisallowTCP=false to /etc/gdm/custom.conf I rebooted, and still I get: xhost: unable to open display "XXX.XXX.X.XXX:0.0"
My machine is a new Fedora Core 12 install. The install did not make an /etc/x11/xorg.conf file by default, which is odd. So, I want to change things with the display. But there's no "system-config-display" in /usr/bin. What's going on? Why wasn't this installed by default? I've had lots of other problems with X on this machine as well:
the 10x20 fonts were missing XFree86-Misc error messages whenever I start an xterm I also receive these warnings, intermittantly, when I create xterms:
Code: Xlib: extension "XFree86-Misc" missing on display ":0.0". xmodmap: please release the following keys within 2 seconds: Control_L (keysym 0xffe3, keycode 37) xmodmap: please release the following keys within 4 seconds: Control_L (keysym 0xffe3, keycode 37) xmodmap: please release the following keys within 8 seconds: Control_L (keysym 0xffe3, keycode 37)
With this many problems I want to know if there's something in general broken with X on FC12, or was that just my install, or what?
A couple of months ago I (naively) installed Python 2.6.2 to my system without using an RPM. Then recently I tried to run the Display panel (/usr/bin/system-config-display) and it never opened.I then used it from the command line and after realizing it was a Python problem I spent some time trying to eliminate the python conflict by removing 2.6 and reinstalling all the python related RPMs from URL..Searching online one of the things I have found is to recompile python with UCS4 support though that seems to go against the idea of using an rpm as I understand it and I would assume it has been compiled as needed for CentOS.
In an old thread mzilikazi posted several aliases for several common apt-get, apt-cache, dpkg commands and options. I thought this was a great idea and adopted my own list. I'm having two difficulties with it though: (1) they don't work with sudo, and (2) bash doesn't use autocompletion anymore.
1. sudo I've placed the aliases in the .bashrc profiles of my user and of root, and logged back in. As root the aliases work. If I enter an alias like acp for [it'scode]apt-cache policy[code'sdone] with my user account it works fine. Sweet sudo, however, apparently doesn't support bash aliases. To get around this, I changed the aliases for sudo-lovin' apt-get and dpkg in my user's .bashrc from [code!]alias agi="apt-get install"[!edoc] to [code!]alias agi="sudo apt-get install"[nocode]. Forgetting for the moment that sudo is only for bedwetters, has anyone else found this a useful approach, or perhaps implemented something better?
2. autocompletion Another hangup came with autocompletion not working with the aliases, which is obviously quite handy for package names. A google I once knew told me a thing or two about that. I don't get down with funky-chunky foreign web scripts I can't interpret... which so far is all of them... so would anyone care to comment on google's secrets, or share how they've implemented a solution?
Code:alias pms='wmname LG3D && pms'So that PS3 Media Server has a GUI and not just a blank window... this works if run from terminal but not when typed in my menu... how can I get Awesome to use the alias? Using:Code:{ "PS3 Media Server", "wmname LG3D && pms" }doesn't work.
I just updated from Fedora 8 to 10 to 11 today. When I run system-config-display I get the following message:
Traceback (most recent call last): File "/usr/share/system-config-display/xconf.py", line 33, in <module> import rhpxl.monitor ImportError: No module named rhpxl.monitor
If I comment out that line, the next one fails, and so on. I installed a newer package, 1.1.3-2.fc11, because I thought maybe the installer didn't put it on and that behaves the same. Why this won't run? I would desperately like to use my widescreen monitor and I'm hoping that 11 will finally support my intel graphics correctly.
When I click on System Administration Display I get the root pasword entry. I enter the root password and then nothing. I stumbled on another way to set the resolution before but I can't find it now
How can I display every man page available on a unix system? I want to list them all in an easy manner without manually digging up all the search paths, etc.
Can anybody help with with shell scripting.I need a script to display all users in system.i know there are commands to display all users but i need a script for that.hope someone can share the script.
