How to change DNS in AIX.

Most AIX system administrators use: smitty tcpip to add a hostname, IP address, network mask, gateway and DNS server setting to get the virtual machines (LPAR) and AIX on a network.  And as a side benefit so we don't need to use the ghastly VTERM console any more as ssh or the dreaded unsecure telnet (just don't do it) can now be used - as the root user:

 # smitty tcpip

Move cursor to desired item and press Enter.



  Minimum Configuration & Startup

  Further Configuration

  Use DHCP for TCPIP Configuration & Startup

  IPV6 Configuration

  Quality of Service Configuration & Startup

  Configure IP Security (IPv4)

  Configure IP Security (IPv6)




Once smitty starts, you take the "Further Configuration" Second line menu option:

Move cursor to desired item and press Enter.

  Hostname

  Static Routes

  Network Interfaces

  Name Resolution

  Client Network Services

  Server Network Services

  Manage Print Server

  Select BSD style rc Configuration

  Start Configured TCPIP Daemons

  Stop TCPIP Daemons

  Authentication Configuration

Then the Fourth option "Name Resolution"

Move cursor to desired item and press Enter.



  Domain Nameserver

  Hosts Table (/etc/hosts)

Then the First option "Domain Nameserver"

Move cursor to desired item and press Enter.



  Start Using the Nameserver

  List All Nameservers

  Add a Nameserver

  Remove a Nameserver

  Stop Using a Nameserver

   -------------------------------

  Set / Show the Domain

  Remove the Domain

  Set / Show the Domain Search List

  Remove the Domain Search List

Then the Second option "List All Nameservers" for showing existing DNS entry(Coming previous option then press ESC+3).

Then the Fourth option "Remove a Nameserver" for removing old DNS entry.

Then the Third option "Add a Nameserver" for adding DNS entry(For Commit then press ESC+4)