Debian :: Check The Validity Of The Specified Hostname?
Apr 21, 2010
But, given that I've mixed some source and unstable packages in with my stable system, I'm now experiencing a few eccentricities (which really should make me swear off screwing around with my system, but, alas, I don't seem to learn from experience).
I digress. Anyway, in trying to play cdroms (with xplaycd and with kaffeine), it does not work. Kaffeine gives me the following feedback:
Code:
The host you're trying to connect is unknown.
Check the validity of the specified hostname. (unable to resolve)
PS, I am a member of both audio and cdrom.
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Mar 31, 2010
Why do XML validation tools like [URL]..and xmlstarlet say that the google.com homepage is not valid XML? As I understand it, most HTML today is XML (and I have a hard time believing google writes bad html). I'm interested b/c I'd like to use xmlstarlet and other xml processing utilities to process and parse web pages to extract information from them.
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Feb 3, 2010
I am new to Debian but not Linux-based systems. I have been experimenting a lot with Debian Lenny/Squeeze. I am growing more comfortable each day with the Debian design. Yet there remain many unexplored areas. I am creating a migration check list. Things to check, prepare, or reconfigure when moving from one Linux-based system to Debian.
I have a good computer background and my current check list probably is fairly good. Yet I would appreciate input and opinions from experienced Debian users of things to watch in such a migration. Login defs, passwd/group files, different directory locations, keymaps, services and daemons, etc. I am not too concerned with the desktop as I plan to stick with KDE 3.5 for a while and I can basically move those settings across.
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Jan 3, 2010
I have a network of 2 WinXP machines and one linux box. I have fiddled around with the settings as you do when learning. The network is working. The network neighbourhood on the WinXP machines recognise the linux box and vice versa, (the linux Places|Network recognises the 2 WinXP). I can Ping the linux box using its hostname from a WinXp. But I cannot do the reverse. I get an 'unknown host' response. I can ping the linux to itself using its hostname.
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Jul 29, 2010
I'm having an issue on two Fedora Core 13 machines where I can ping others by hostname, but the hostname resolution fails whenever I use ssh/scp/vnc/etc. I can still do these things by IP address, just not by hostname. RHEL5.3 machines on the same network with the same configuration do not seem to have this problem.
Here's the not-so-quick-and-dirty description of the situation:
I know that there is a virtual router at 192.168.31.1 and another at 192.168.30.1. I also know that there is another network (let's call it 90.90.90.0) and on that network lies a number of resources. By nature of this configuration, any machine on 90.90.90.0 can be accessed by any 192.168.x.x, but not the other way around. Beyond that is out of my hands and currently out of my scope of knowledge.
I have a dnsmasq server on 90.90.90.10 that operates as a secondary nameserver, another machine out of my sphere of influence is the primary nameserver (90.90.90.31).
The secondary nameserver on 90.90.90.10 holds the hostnames of our development machines. The problem is that in some cases, while I can ping by hostname all day long, services such as ssh, scp, vncviewer, etc all fail to resolve the hostname. In other cases I can do all of these things.
Every machine has an equivalent resolv.conf:
As an example, I will show the output of a handful of my development machines:
I also included columbia as a one-way test -- even though it cannot access 30.x or 31.x, they can access it:
columbia -- physical machine, Red Hat Enterprise 5.3, IP 192.168.100.200
Okay, so here are the various outputs. Remember, nibbler, discovery, and atlantis can ALL:
- Ping by IP address
- Ping by hostname
- ssh, scp, vnc, etc by IP addess
Additionally, the SERVFAIL reply from 90.90.90.31 is expected since my dnsmasq server is on the secondary server.
Note that the only machine that can both ping and ssh/scp/etc by hostname is nibbler, which also happens to be the only one of the three running RHEL5.3 instead of FC13. Other virtual and physical machines running on the 192.168.31.0 and 192.168.30.0 networks (all running RHEL5.3) work just like nibbler does. So the problem seems to only affect machines running FC13.
Final note: selinux is disabled, iptables is disabled, ip6tables is disabled.
Other than that, discovery is a brand-spanking-new install straight off of the FC13 DVD. atlantis has been around longer, but its just a file server so I haven't done anything too crazy to it.
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Apr 6, 2010
How do I set $HOSTNAME to dynamically update with the hostname that is specified for the ip in DNS?
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May 24, 2010
I'm trying to ping another Ubuntu computer on my local network. If I try doing,ping <hostname>then I get the messageping: unknown host <hostname>however, if I doping <hostname>.localthen I get a response back. I was wondering how I can change it so that I can ping without having to append .localI've installed winbind and modified my /etc/nsswitch.conf file but this has made no difference.
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May 22, 2011
I have an ubuntu 10.04 server with hostname "abc.domain.com". However, due to migration, we had to change to hostname to something else, "xyz".
I have done changing /etc/hosts and /etc/hostname and run /etc/init.d/hostname start.
Checking the hostname and all shows it is now using hostsname of xyz. However, email sending out is still using old hostname. We have some scripts that will send out alerts like failed rsync or hdd space full to my email account. But I see the sender is still "root@abc.domain.com".
How do change that to xyz? I am using postfix. I have edited main.cf and restarted postfix but no go.
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Apr 15, 2010
I tried to change hostname through ssh.
Old hostname = server1
New hostname = server1.domain.local
I changed the hostname by editing the /etc/hostname file
Old:
/etc/hostname
server1
New:
/etc/hostname
server1.domain.local
Then I executed /etc/init.d/hostname.sh, and get as below, looks OK!
hostname -f
server1.domain.local
hostname
server1.domain.local
hostname -s
server1
The logs are still just showing server1.
Example:
tail -f /var/log/auth.log
Apr 15 13:30:01 server1 CRON[22783]: pam_unix(cron:session): session opened for user root by (uid=0)
Apr 15 13:30:02 server1 CRON[22783]: pam_unix(cron:session): session closed for user root
Do I really have to reboot, or is this normal behaviour that it does not show the full hostname?
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Apr 18, 2011
So I recently upgraded from Debian 5 to Debian 6 and now for some reason I cant SSH into my server FROM my server. All of the following fail with the same error:
[URL]
They all come back with: ssh: Could not resolve hostname 127.0.0.1: Name or service not known. I never actually tried this before upgrading so I'm not sure if its caused by the upgrade, but I would like to get this fixed. Also, ping with all of the above hostnames fails as well. I can SSH in from other computers and I can SSH out from the server. For whatever reason, I cant SSH from the server to the server though.
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May 6, 2011
My server's hostname is 'cookhome'. I am wanting it to broadcast over my network so I can just use that name instead of the IP address, but it isnt working. I am unable to ping it from any other computer./etc/hosts
Code:
127.0.0.1 localhost
127.0.1.1 cookhome
[code]....
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Mar 31, 2010
How I can ping my debian computers on their hostname?
I have installed both samba and winbind and I have also changed the line in /etc/nsswitch.conf to:
Hosts: files wins dns
I have done the same thing on another linux box (ubuntu) just to see if that worked and it did - I could ping it on the hostname.
Also, I have trid to add the ip/hostname in /etc/hosts and even that didn't work.
The /etc/resolv.conf seems to be as it should.
In the /etc/hostname the hostname is updated.
I have tried to restart the samba service and the networking service and even the entire computer but none of it worked.
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Jan 21, 2010
the difference between $HOSTNAME and $(hostname)?
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Apr 20, 2010
On my Linux boxes, I can access another machine using hostname.local as the address. How can I do something similar from Windows (XP)?
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Aug 25, 2014
I'm trying to create preseed configuration for debian. Currently I'm working with Debian version: 7 (wheezy), Installer build: 20130613+deb7u2+b1.
What I want to achieve is to have different network configuration than during installation.
I have two preseed files, one in intrd and the second that is fetched through http (url argument to kernel)
In the initrd file there are settings required to get dhcp network settings that will be used during installation:
Code: Select alld-i netcfg/choose_interface select auto
d-i netcfg/get_hostname string unassigned-hostname
d-i netcfg/get_domain string unassigned-domain
Then in the preseed file that is downloaded from network i have this:
Code: Select alld-i netcfg/choose_interface select auto
d-i netcfg/disable_autoconfig boolean true
d-i netcfg/get_ipaddress string 192.168.56.199
d-i netcfg/get_netmask string 255.255.255.0
[Code] ....
IP address settings work as expected, at the end of the installation netcfg runs again and when installed system boots it has static address set (.199). However hostname stays the same, it is not reconfigured.
I have tried many different combinations like removing get_hostname and get_domain options form initrd preseed and appending 'priority=critical' to kernel boot arguments but no matter what I do it always fails.
Is there any way to do this? I know that hostname can be set by hostname= krenel boot arg or by using dhcp option but I'd like to avoid this.
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Jun 11, 2010
Any attempt to load a webpage gives a Cannot Resolve Hostname error. i can ping [URL], but cannot load the page. However, the page will load by typing its IP address [URL] I have been trying to figure this out for days. cat /etc/resolv.conf nameserver 192.168.1.254
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Aug 18, 2011
Below is the recipe I've used to compile dwm from source on Squeeze
su
apt-get install devscripts debian-keyring
apt-get build-dep dwm
exit
It all seems to work, however debuild gave an error about secret keys. Is this a sensible procedure? What happens in the (probably unlikely) event there is another source patch?I've gone to a tiling window manager as the result of the purchase of a wide screen LCD monitor. I like to have some stuff down the right hand side when running Firefox and OpenOffice in the main panes. Any configuration tricks welcome. Modern screens are the wrong shape!
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May 17, 2010
i am making the shift from centos to debian as i have heard that debian has lot of packages compared to centos and can make you learn more,i want to know how can i match the md5sum provided on the download page with the DVD images
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Jun 10, 2011
I expect to check the RAM speed and type. I ran following command;
$ sudo dmidecode 2.9SMBIOS 2.5 present.
65 structures occupying 2385 bytes.
Table at 0x000F06E0.
Handle 0x0000, DMI type 0, 24 bytes
[Code]....
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Sep 25, 2014
I have a fresh installed debian server.
I am not sure if an FTP was installed or not.
How can I check that?
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May 31, 2010
I have an Debian System on which GUI is not enabled. How to Check that GUI can be started by some command or that has to be reinstalled.
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Feb 25, 2011
I have this deb from a package in unstable...
It calls for libhdf5-openmpi, which is not compatible with libhdf5-serial which in turn is used by several packages that i have installed...
It's either the serial or the openmpi version... not both.
Since this specific package from sid calls for this dependence, which way do i have to check that if i override dependency checking it wont overwrite anything along the way...?
All other dependencies can be met... except this particular one...
And i wont be using the functionality that calls for openmpi...
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Mar 18, 2010
I am not sure whether I ask this question on the right forum. My debian mailserver is depending on a MySQL database. Every reboot it takes around 30 minutes to boot because of the database check. I could not find the right command or setting to boot without this check. Do you know how to do this.
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Sep 25, 2010
Howto check from the command line which modules were loaded after Lenny restart?
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Feb 10, 2011
My system from and after that at startup as it was doing a file system check I got this:
Checking file systems ... fsck 1.41.3 (12-Oct-2008)
/dev/sda1: clean, 30/124496 files 34735/248976 blocks
/dev/hda1 contains a file system with errors, check forced.
[code]...
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Jun 14, 2011
Is it possible to check out the log as well when you are checking out a version from some repo. For instance this is a game I like :-
[Code]...
The game is called dawn-rpg and one can find about it at dawn-rpg.sourceforge.net but that's not what I want to talk about. The thing it would be so much more convenient for me if instead of going to the svn mirror or whatever it is and checking out the log, it was local. I know I could do something like this :-
svn log > svnlog150611.txt
This would download the log file and put the contents in some text file I have named as svnlog150611.txt . The problem with this way of doing things is that each time I have to check out I would have to create a new txt file with that date. If there was a way one could check out the log as well when checking out a new version/release it would be nice. Its also possible that this might be already be there and there might be another command to use locally that I am not aware about. In that case, would look forward to people to share the same.
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Oct 29, 2014
freshly installed Debian-netinst, configured internet connection. Pinged Google - all transmitted packets were received, 0% loss.
Yet I am not sure if I have internet connection for what ever package I am trying to install using apt-get install package_name, I receive
E: Unable to locate package package_name
How can I check internet connection from CLI?
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May 31, 2015
I want to install Debian Stable 8 Jessie. I've tried the main website, of course, first. But there are a lot of options there to download Debian 8: CD, DVD, Live etc. I downloaded debian-live-8.0.0-amd64-lxde-desktop.iso and I booted live in VirtualBox. It boots fine and the operating system looks in order.
Questions/problems:
1. The desktop icon for the installer says "Install Debian sid". But from what I know "sid" is unstable version. I do not want unstable, nor testing. I just want normal Stable. Did I got the wrong version? The website is a bit confusing about which version is which.
2. How do I check the md5 of the iso? I know how to do that with other distros, they usually specify it near the download link and I can execute in terminal the command 'md5sum' followed by the specific linux distro iso and then compare the numbers. But I can find no such thing for Debian. I searched the website but could not find any clear info.
3. After I install, what should I do in order to make Iceweasel work with Flash and multimedia codecs? I also need Skype and the proprietary Nvidia drivers.
And if I enable these non free, do I get automatic updates for them like for the rest of standard Debian software? Or, if not, what should I do?
The idea is that I want a system that is as stable and bug free as possible, but I won't use many apps beyond these ones. I don't need the latest and greatest software as long as these get security updates. Should I be ok with this configuration?
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Sep 11, 2015
Also how do I check the latest version available? I gather to update a driver I need to update the kernel so ill not be doing that but im trying to get more familiar with linux here. I know how to do this in windows so it would be good to be able to check driver versions in linux too. Im on debian 8.1 with intel HD4400 graphics.
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Oct 3, 2015
How do you check if a computer's video card will support Kernel Mode Switching BEFORE OS installation?
In this example I have an Acer Aspire AST180-UA381B.
Manufacture website says my video card is: Integrated nVidia MCP61
[URL] ....
Nouveau code list says: NV4C (MCP61) GeForce 6150LE / nForce 400/405, GeForce 6150SE Quadro NVS 210s / nForce 430
[URL] ....
I want to know:
1. How to tell if my graphics card will support KMS before I install the OS?
2. If it does not support KMS which kernel options should be passed to get it to work properly with the nouveau driver?
3. Ultimately I am looking for a tool that should be included in the installation screen that will:
a. identify your hardware: list the hardware detected on the screen
b. highlight with color code any hardware listed that is not supported or poorly supported: in this case graphics drivers
c. perform a quick benchmark test of your hardware: In this case I want the benchmark to tell me what capabilities my graphics card has.
d. automatically recommend and set the best kernel parameters for a successful boot: if the graphics card needs nomodeset or modeset=0 or whatever I want it to do it for me.
Also I started a personal blog about this issue which I intend to compose into guide to assist others with this question. [URL] ....
My goal is to create a boot disc that will automate proper installation of graphics or other hardware for a system BEFORE installation. I would like to see this feature included in the Debian installation screen.
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