Linux get server name

How to get the computer name (not its hostname)?

All the results of my searches end up having something to do with hostname or uname -n . I looked up the manual for both, looking for sneaky options, but no luck. I am trying to find an equivalent of OSX’s scutil —get ComputerName on Linux systems. On Mac OS X, the computer name is used as a human-readable identifier for the computer; it’s shown in various management screens (e.g. on inventory management, Bonjour-based remote access, . ) and serves as the default hostname (after filtering to handle spaces etc.).

I might be wrong, but defining the name of the computer as its network name means that it doesn’t have a fixed name, right? When you install a Linux or OSX on a machine, you usually choose a name for that computer (which is the default network name I assume). For example my laptop might be named «FooBar» but when I connect to a network at work I get a hostname such as «machine42.work.localnetwork».

@Sh3ljohn what purpose does computername is osx serve? I don’t think there’s any equivalent in linux system.

Did you give some name other than hostname when installing that computer? Try searching for that name in /etc: grep -ri ‘name’ /etc

@Bibek_G I would like to use this to identify the machine on which I am running from a software of mine. UUID is insufficient because there might be several OS’s installed on the same disk which in turn run on the same machine.

5 Answers 5

The closest equivalent to a human-readable (and human-chosen) name for any computer running Linux is the default hostname stored in /etc/hostname . On some (not all) Linux distributions, this name is entered during installation as the computee’s name (but with network hostname constraints, unlike macOS’s computer name). This can be namespaced, i.e. each UTS namespace can have a different hostname.

Systems running systemd distinguish three different hostnames, including a “pretty” human-readable name which is supposed to be descriptive in a similar fashion to macOS’s computer name; this can be set and retrieved using hostnamectl ’s —pretty option. The other two hostnames are the static hostname, which is the default hostname described above, and the transient hostname which reflects the current network configuration.

Systemd also supports a chassis type (e.g. “tablet”) and an icon for the host; see systemd-hostnamed.service .

But this file is often used to set hostname and uname -n , and @Sh3ljohn explicitly wanted to avoid the output of those two commands.

Источник

Linux get server name

NAME

hostname - show or set the system's host name domainname - show or set the system's NIS/YP domain name ypdomainname - show or set the system's NIS/YP domain name nisdomainname - show or set the system's NIS/YP domain name dnsdomainname - show the system's DNS domain name

SYNOPSIS

hostname [-a|--alias] [-d|--domain] [-f|--fqdn|--long] [-A|--all-fqdns] [-i|--ip-address] [-I|--all-ip-addresses] [-s|--short] [-y|--yp|--nis] hostname [-b|--boot] [-F|--file filename] [hostname] hostname [-h|--help] [-V|--version] domainname [nisdomain] [-F file] ypdomainname [nisdomain] [-F file] nisdomainname [nisdomain] [-F file] dnsdomainname 

DESCRIPTION

Hostname is used to display the system's DNS name, and to display or set its hostname or NIS domain name. GET NAME When called without any arguments, the program displays the current names: hostname will print the name of the system as returned by the gethostname(2) function. domainname will print the NIS domainname of the system. domainname uses the gethostname(2) function, while ypdomainname and nisdomainname use the yp_get_default_domain(3). dnsdomainname will print the domain part of the FQDN (Fully Qualified Domain Name). The complete FQDN of the system is returned with hostname --fqdn (but see the warnings in section THE FQDN below). SET NAME When called with one argument or with the --file option, the commands set the host name or the NIS/YP domain name. hostname uses the sethostname(2) function, while all of the three domainname, ypdomainname and nisdomainname use setdomainname(2). Note, that this is effective only until the next reboot. Edit /etc/hostname for permanent change. Note, that only the super-user can change the names. It is not possible to set the FQDN or the DNS domain name with the dnsdomainname command (see THE FQDN below). The host name is usually set once at system startup in /etc/init.d/hostname.sh (normally by reading the contents of a file which contains the host name, e.g. /etc/hostname). THE FQDN The FQDN (Fully Qualified Domain Name) of the system is the name that the resolver(3) returns for the host name, such as, ursula.example.com. It is usually the hostname followed by the DNS domain name (the part after the first dot). You can check the FQDN using hostname --fqdn or the domain name using dnsdomainname. You cannot change the FQDN with hostname or dnsdomainname. The recommended method of setting the FQDN is to make the hostname be an alias for the fully qualified name using /etc/hosts, DNS, or NIS. For example, if the hostname was "ursula", one might have a line in /etc/hosts which reads 127.0.1.1 ursula.example.com ursula Technically: The FQDN is the name getaddrinfo(3) returns for the host name returned by gethostname(2). The DNS domain name is the part after the first dot. Therefore it depends on the configuration of the resolver (usually in /etc/host.conf) how you can change it. Usually the hosts file is parsed before DNS or NIS, so it is most common to change the FQDN in /etc/hosts. If a machine has multiple network interfaces/addresses or is used in a mobile environment, then it may either have multiple FQDNs/domain names or none at all. Therefore avoid using hostname --fqdn, hostname --domain and dnsdomainname. hostname --ip-address is subject to the same limitations so it should be avoided as well.

OPTIONS

-a, --alias Display the alias name of the host (if used). This option is deprecated and should not be used anymore. -A, --all-fqdns Displays all FQDNs of the machine. This option enumerates all configured network addresses on all configured network interfaces, and translates them to DNS domain names. Addresses that cannot be translated (i.e. because they do not have an appropriate reverse IP entry) are skipped. Note that different addresses may resolve to the same name, therefore the output may contain duplicate entries. Do not make any assumptions about the order of the output. -b, --boot Always set a hostname; this allows the file specified by -F to be non-existant or empty, in which case the default hostname localhost will be used if none is yet set. -d, --domain Display the name of the DNS domain. Don't use the command domainname to get the DNS domain name because it will show the NIS domain name and not the DNS domain name. Use dnsdomainname instead. See the warnings in section THE FQDN above, and avoid using this option. -f, --fqdn, --long Display the FQDN (Fully Qualified Domain Name). A FQDN consists of a short host name and the DNS domain name. Unless you are using bind or NIS for host lookups you can change the FQDN and the DNS domain name (which is part of the FQDN) in the /etc/hosts file. See the warnings in section THE FQDN above und use hostname --all- fqdns instead wherever possible. -F, --file filename Read the host name from the specified file. Comments (lines starting with a `#') are ignored. -i, --ip-address Display the network address(es) of the host name. Note that this works only if the host name can be resolved. Avoid using this option; use hostname --all-ip-addresses instead. -I, --all-ip-addresses Display all network addresses of the host. This option enumerates all configured addresses on all network interfaces. The loopback interface and IPv6 link-local addresses are omitted. Contrary to option -i, this option does not depend on name resolution. Do not make any assumptions about the order of the output. -s, --short Display the short host name. This is the host name cut at the first dot. -V, --version Print version information on standard output and exit successfully. -y, --yp, --nis Display the NIS domain name. If a parameter is given (or --file name ) then root can also set a new NIS domain. -h, --help Print a usage message and exit.

NOTES

FILES

/etc/hostname Historically this file was supposed to only contain the hostname and not the full canonical FQDN. Nowadays most software is able to cope with a full FQDN here. This file is read at boot time by the system initialization scripts to set the hostname. /etc/hosts Usually, this is where one sets the domain name by aliasing the host name to the FQDN.

AUTHORS

Peter Tobias, tobias@et-inf.fho-emden.de> Bernd Eckenfels, net-tools@lina.inka.de> (NIS and manpage). Michael Meskes, meskes@debian.org>

Источник

How To Get Host Name and Domain Name Of Linux?

Host name is the identifier of a system in the network. Host name can be get with different ways in Linux. Host name is generally put in the /etc/hostname file.

Get Host name By Echoing Host name File

Host name information is stored in a file /etc/hostname . So we can simple print the host name to the terminal with echo command like below.

Get Host name With hostname Command

We can get host name with hostname command. This will only list host name and will not print domain related information.

Get Fully Qualified Host name

We can get fully qualified host name which provides full name with domain information.

Hostname File

Host name file /etc/hostname will only provide host name with fully qualified domain name. There will any no other data in this file.

Change Host name

As the hostname is stored in the /etc/hostname file we can change the hostname by editing this file. We will set the hostname as ubu1 with the following echo command. Keep in mind that in order to change /etc/hostname file we require root privileges which can be get with the sudo command.

$ sudo echo "ubu1" > /etc/hostname

Get Domain Name

Domain name information is about the systems network configuration.

How To Get Host Name and Domain Name Of Linux? Infografic

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