Linux Administration/Networking/DNS

This lesson covers DNS.

Objectives and Skills

Objectives and skills for the DNS portion of Linux+ certification include:

• Configure client-side DNS
  • Query remote DNS servers
  • Configure local name resolution and use remote DNS servers
  • Modify the order in which name resolution is done
  • The following is a partial list of the used files, terms and utilities:
    • Files:
      • /etc/hosts
      • /etc/resolv.conf
      • /etc/systemd/resolved.conf
      • /etc/nsswitch.conf
      • /etc/network/interfaces
    • Utilities:
      • host
      • dig
      • getent
      • nslookup
      • systemd-resolve
      • netplan

Activities

1. Display your DNS configuration in macOS running: scutil --dns

See also

• scutil (command) (macOS): scutil --dns show DNS configuration
• resolved.conf (Systemd)
• w:Dnsmasq

References

← Troubleshooting

Linux Administration/Networking