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Questions tagged [hostname]

A hostname is the label given to a device connected to a computer network.

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How can I find out the hostnames of other computers in the same local network?

In my local wifi, I can find out the IP and MAC of another computer which also runs Lubuntu, and whose hostname is known to me. $ sudo arp-scan olive [sudo] password for t: Interface: ...
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2answers
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Why does Python 'gethostname()' return the entire FQDN when run on a FreeNAS server console?

I get this (FreeNAS 11.2-RELEASE-U1): Python 3.6.5 (default, Dec 20 2018, 21:27:40) [GCC 4.2.1 Compatible FreeBSD Clang 6.0.0 (tags/RELEASE_600/final 326565)] on freebsd11 Type "help", "copyright", ...
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2answers
50 views

How to access a device connected in local network with hostname?

I tried accessing a webpage in a server within the local network with the host name of the device followed by its folder path and the name of the file(it is a basic php file). In first system it ...
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2answers
2k views

Does a computer system (Linux) only have one host name?

hostname is used to display the system's DNS name, and to display or set its hostname or NIS domain name. Does a computer system (Linux) only have one host name? In virtual hosting, several host ...
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1answer
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Generating default DKIM keys: Cannot determine host's domain name, so skipping default key generation

I'm following this guide https://www.linuxtechi.com/configure-domainkeys-with-postfix-on-centos-7/ When I get to this section, it gives an error # opendkim-default-keygen Generating default DKIM ...
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1answer
50 views

Linux/Windows client resolve Linux hostname on LAN

According to Debian's RPi3 image wiki, I should be able to ssh into a Raspberry-Pi, with just the hostname. I shared internet from my Debian laptop, WiFi to the a Raspberry-Pi over Ethernet, but the ...
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1answer
157 views

Understanding why hostname -i returns strange IP address

I am referencing the following question because it's similar but not the same: hostname -i returns strange result in linux On my CentOS 7 system, I get a strange IP address from "hostname -i" after ...
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1answer
51 views

What is this random name in my command-line prompt? [duplicate]

I'm trying to figure out what this (obretschlt2-w7) is, from my command-line prompt. I'm using a conda environment, with the name µ_env, with my Username mu. However I can't figure out where the 2nd ...
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1answer
306 views

How to deal with underscores in hostnames?

I got DNS set up on my company's server and it works just fine, except I got problem with some phones. For example one of the phones is “Huawei P9 lite”, and it's hostname (set on the phone, no chance ...
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0answers
240 views

dnsmasq is not resolving local hostnames

I have a local Linux server running dnsmasq for my LAN. It has been working without issues for the last several years. I keep the operating system and packages regularly updated. After yesterday's ...
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1answer
585 views

How do I fix my problem with hostnamectl command. It cannot connect to dbus

I am running Debian 9.4. hostname works. $ sudo strace -f hostnamectl ...snipped... connect(3, {sa_family=AF_UNIX, sun_path="/var/run/dbus/system_bus_socket"}, 33) = -1 ENOENT (No such file or ...
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157 views

ssh to another user of the same host using dns domain

Is it a problem to ssh to another user of the same host using dns domain? I cannot conigure it. I cannot configure it to passwordless connection. Also when I am trying to connect with password the ...
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2answers
164 views

uptime Script help [closed]

I am looking to build a script that will log in to multiple servers using a host file and run uptime, hostname -I and hostname Script so far echo"" ; echo "hostname:" $(ssh $HOST hostname) ; echo "...
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0answers
509 views

ssh does not recognize host name defined in config file [closed]

My ssh can no longer resolve my hostname. Everything was working fine until I did a security update on my ubuntu v16.04. I try to do ssh <myhost> and receive the error ssh: Could not resolve ...
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3answers
292 views

macOS Sierra (10.12.6) hostname command not appending “.local”

To be brief: From what I understand the hostname command has an option -f. From the man page: -f Include domain information in the printed name. This is the default behavior. As it's the ...
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1answer
40 views

SSH connects but stays on the same machine [closed]

I've got an unusual problem at hand that I couldn't solve for 2 days. I've got two KVM running on my real machine. One of them is named headnode and the second is named computenode. These machines ...
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2answers
3k views

What's the point of the hostnamectl command?

As opposed to editing /etc/hostname, or wherever is relevant? There must be a good reason (I hope) - in general I much prefer the "old" way, where everything was a text file. I'm not trying to be ...
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1answer
64 views

How to change `ping from` value when pinging Linux server?

Content of hostname file in my server is: # cat /etc/hostname sub.mysite.com But when I ping my CentOS 7 server it says: # ping sub.mysite.com 64 bytes from sub ... Even: # ping ns1.mysite.com ...
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1answer
24 views

How to attach domain to RHEL7 using the shell?

I would like to know what files must I edit in order to add a domain on a RHEL7 machine? Example: Hostname: Server1 Domain Name: qwer.tyu.iop Result: Server1.qwer.tyu.iop
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1answer
275 views

CentOS Application Installer Updates failed “Cannot resolve hostname”

I attempted to run updates from the Application Installer and ran into the following error. failed to download https://extensions.ognome.org//extension-query/?shell_version=3.22.3&page=1&...
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PC-name, localhost, hostname etc. on Fedora

Today I reinstalled Fedora and saw a strange name on the command line [ekkl@37L4247F27-25 ~]$ uname -a Linux 37L4247F27-25 4.16.15-300.fc28.x86_64 #1 SMP Tue Jun 12 00:42:35 UTC 2018 x86_64 x86_64 ...
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1answer
167 views

BIND as a DNS server host command is refused

I am attempting to run my host machine as a DNS server, it will also function as the gateway. My /etc/named.conf is as follows: options { directory "/var/named/"; allow-query {127.0.0.1;...
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1answer
30 views

Is there a canonical method a host can use to self-rename?

Naming hosts and keeping track of them is a lot of work on a home network or on a test cluster of VMs. Is there a canonical way to make a host self-rename from whatever name it was initially set with ...
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1answer
228 views

Suppress “Name or service not known” on ping

I have several Raspberry Pi's named numerically (pi0, pi1, etc). They have static IP addresses, but I wanted a simple tool to check on them and make sure they were online even if they got the wrong IP ...
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1answer
44 views

Set hostname via ssh error SCRIPT

im using this script to change hostname via ssh but i got some errors. read -p "Insira o IP : " ip read -p "Insira o nome do utilizador : " host read -s -p "Insira a palavra passe : " oldpass ...
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1answer
104 views

Setting up hostname, hosts & domain correctly [closed]

I'm new to this platform but I try to be as specific as possible. I researched quite a lot but every new answer just adds to the confusion at the moment. I am running Debian on my first server with a ...
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1answer
46 views

Is it possible to display a different hostname, when a user logs in?

I have an issue where my customer used a different hostname naming convention than my company did, for the devices they purchased from us. Example: We named the devices Lenny1, so the FQDN is lenny1....
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0answers
214 views

Cannot change hostname of raspberry pi in local network

I have a clean install of the debian-based OSMC os on a raspberry pi. I've manually set a static IP: $ ifconfig wlan0 wlan0: flags=-28605<UP,BROADCAST,RUNNING,MULTICAST,DYNAMIC> mtu 1500 ...
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1answer
33 views

What is the best approach to find a system's domain name?

I use the following syntax in order to find the domain name on a Linux machine: hostname | sed s'/\./ /g' | awk '{print $2}' hostname master02.sys65.com hostname | sed s'/\./ /g' | awk '{print $2}' ...
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0answers
93 views

Is changing the system hostname on a server with a running MySQL / MariaDB service harmful?

I want to change the hostname of a running CentOS 7 server which is running MySQL (mysql Ver 15.1 Distrib 10.0.33-MariaDB, for Linux (x86_64) using readline 5.1). Although I can't find any sources ...
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1answer
51 views

How can I ping my dhcp server using hostname?

I've just configured a PC with a dhcp server and an apache server on it. I want to set a hostname to my server (i.g "myserver") in order to be able to access its web server by writing on the browser "...
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0answers
159 views

UFW blocks hostname lookup on LAN for ssh and ping

I'm experiencing a problem connecting to hosts on my LAN via their hostname only when UFW is enabled. When UFW is enabled: ssh <machine> gives the message: ssh: Could not resolve hostname &...
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2answers
6k views

Could not reliably determine the server's fully qualified domain name

I was following this tutorial to setup two virtual hosts in Centos 7. The issue is i am getting the following error while restarting the httpd. [userme@server ~]$ sudo systemctl restart httpd....
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1answer
65 views

Changing system hostname makes samba being unaccessible

I found something weird in my debian 9 config. I changed my hostname by editing /etc/hostname and rebooting from "myhost" to "myhost-hello". Since this modification connecting to the machine via it'...
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1answer
2k views

Is /etc/init.d/hostname.sh still an option for debian stretch?

I changed the host name and went to make it stick, but my previous solution didn't work. I am using Linux raspberrypi 4.9.59-v7+ #1047 SMP Sun Oct 29 12:19:23 GMT 2017 armv7l GNU/L. Is there a new ...
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1answer
2k views

How the hostname resolution / lookup happens in Linux? [closed]

I am new to Linux and need to know how nslookup command resolves hostname? what are the configuration files that are used by nslookup command - I need to know the exhaustive list of files that are ...
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1answer
2k views

SUSE Linux Enterprise 12: Change Hostname permanently

I want to change the hostname for a VM, but struggle to do it permanently. Already changed it via /etc/hosts and /etc/hostname, but did't work out. Does anyone have an advice? Thanks in advance.
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2answers
226 views

How can I log into a running docker instance?

poking docker to see how it works: ubuntu@ip-172-31-14-19:~$ ubuntu@ip-172-31-14-19:~$ sudo docker run --net=host -d -t jmar71n/freepbx ...
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1answer
51 views

openSuSE prompt on AWS configuration

On an Amazon aws ec2 openSuSE instance: thufir@ip-<ip>:~> thufir@ip-<ip>:~> echo $PS1 \u@\h:\w> thufir@ip-<ip>:~> how do I set the prompt to something more friendly? ...
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1answer
941 views

Why isn’t the hostname command getting the FQDN from /etc/hostname? [duplicate]

I set the hostname. # more /etc/hostname kafka01.ocff4.com The hostname is still as follows. hostname kafka01 I restart using the following command. systemctl restart systemd-hostnamed But ...
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1answer
224 views

Postfix myhostname change

I'm currently trying to change the myhostname field. So, I have this situation: My server doesn't need an Internet domain anymore, since it will be a local host server. But I want to serve mail ...
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1answer
120 views

How do I change hostname in trueos

I want to change the hostname that was generated during installation. How do I do that in Trueos?
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1answer
150 views

How a Virtualbox ubuntu VM able to resolve another ubuntu VM's hostname.?

I have 2 Virtualbox VM's on which I have Ubuntu 15. The hostnames are: Machine 1: satya-VirtualBox Machine 2: sam1-VirtualBox Hosts file on machine 1- But I am able to ping machine 2 from 1 using ...
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0answers
349 views

Validate hostname

As part of my script I have to validate a user input hostname. I am currently doing this. nslookup $cloud_hostname 1> /tmp/.hostname_look_up TEST_HOSTNAME=$(grep find /tmp/.hostname_look_up) if [[...
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1answer
73 views

My Linux server forgets its host name every day

I have a Linux server # uname -a Linux site 3.12.39-47-default #1 SMP Thu Mar 26 13:21:16 UTC 2015 (a901594) x86_64 x86_64 x86_64 GNU/Linux # lsb_release -a LSB Version: n/a Distributor ID: SUSE ...
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1answer
15k views

How to filter by host name in Wireshark?

Display filter in form ip.src_host eq my.host.name.com yields no matching packets, but there is traffic to and from this host. DNS name is resolved successfully, and filters using ip addresses like ip....
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1answer
185 views

getnameinfo is not resolving IP

I have gateway installed on Ubuntu, and not able to get hostname for local IPs, using nslookup or programmatically using getnameinfo nslookup gives: fuad@URLF:~$ nslookup 192.168.1.107 Server: 127.0....
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2answers
1k views

How to block hostnames with wildcards or Regex?

Currently I uses a big /etc/hosts to block unwanted hostnames. But the file is getting bigger and bigger closing in on 700000 entries. The are many similar entries so I would like to use wildcards ...
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1answer
335 views

Changed hostname, now I can't run a tripwire check: “policy file does not match policy used to create database”

So due to problems with my hostname I just changed it. The problem with that is that in the tripwire configuration I left the hostname variable within the name of the dbfile and the local keyfile as ...
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2answers
1k views

Fedora 26 and fully qualified domain names?

I installed Fedora 26 for testing under GCC 7. F26 is installed in a 64-bit VirtualBox VM. I ran the following commands to configure the system post-install, and then rebooted: localhost:~$ sudo ...