hostname

Wat het doet

Zo schrijf je het

hostname [OPTION]
hostname [-b] [-F FILE] [NAME]

Meest gebruikt

Niets past bij dit filter.

$ als gewone gebruiker# als root (of met sudo)

1. 1Show the host name

   $hostname
   server1.example.com

   RHEL often uses the full name as host name.

2. 2Short name and FQDN

   $hostname -s; hostname -f
   server1
   server1.example.com

   -f needs /etc/hosts or DNS to know the full name.

3. 3All IP addresses

   $hostname -I
   192.168.122.10 fe80::5054:ff:fe12:3456

   Quick way to find the IP of a fresh VM.

4. 4Domain part

   $hostname -d
   example.com

   Same as dnsdomainname.

5. 5Set a name until reboot

   #hostname test1

   For a quick test only.

6. 6Set the name for good

   #hostnamectl set-hostname server1.example.com

   Writes /etc/hostname (the RHCSA way).

7. 7Use the name in a prompt or file name

   $tar -czf /backup/$(hostname -s)-etc-$(date +%F).tgz /etc

   Each server makes a different file name.

8. 8Check the name for certificates

   $hostname -f; getent hosts $(hostname -f)

   The FQDN must resolve to the server IP before you request a TLS certificate.

9. 9Find wrong FQDN settings

   $hostname -f
   hostname: Name or service not known

   Add the name to /etc/hosts or DNS.

10. 10Show the domain of NIS

    $hostname -y

    Only for old NIS setups.

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Bestanden

/etc/hostname

The static host name.

/etc/hosts

Local name to address list.

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