How to Fix nslookup, host, dig: -bash: command not found in Linux?

Symptoms:

When i try to verify the dns and run a few dns command utilities such as host, dig and nslookup, below error appeared:

    [root@mail ~]# host -t mx zimbra.local
    bash: host: command not found
    [root@mail ~]# dig -t mx zimbra.local
    bash: dig: command not found
    [root@mail ~]# nslookup -t mx zimbra.local
    bash: nslookup: command not found
    

Findings:
If you have above problems in your Linux server, probably you might be missing the package that contains bind utilities. Please note that the host, dig and nslookup are part of the bind utilities.

See also  How to Setup Postfix on CentOS 6.4

Solution:

Run this command to install the bind utilities.

    [root@mail ~]# yum install bind-utils
    Setting up Install Process
    Setting up repositories
    Reading repository metadata in from local files
    Parsing package install arguments
    Resolving Dependencies
    --> Populating transaction set with selected packages. Please wait.
    ---> Downloading header for bind-utils to pack into transaction set.
    bind-utils-9.3.6-4.P1.el5_4.2.i386.rpm                                      |  43 kB     00:00
    ---> Package bind-utils.i386 30:9.3.6-4.P1.el5_4.2 set to be updated
    --> Running transaction check
    
    Dependencies Resolved
    
    =============================================================================
     Package                 Arch       Version          Repository        Size
    =============================================================================
    Installing:
     bind-utils              i386       30:9.3.6-4.P1.el5_4.2  rhellocalrepo     170 k
    
    Transaction Summary
    =============================================================================
    Install      1 Package(s)
    Update       0 Package(s)
    Remove       0 Package(s)
    Total download size: 170 k
    Is this ok [y/N]: y
    Downloading Packages:
    Running Transaction Test
    warning: bind-utils-9.3.6-4.P1.el5_4.2: Header V3 DSA signature: NOKEY, key ID 37017186
    Finished Transaction Test
    Transaction Test Succeeded
    Running Transaction
      Installing: bind-utils                   ######################### [1/1]
    
    Installed: bind-utils.i386 30:9.3.6-4.P1.el5_4.2
    Complete!
    

How to Reset the Directory Manager Password on RHEL 7 / CentOS 7
How to Reset the Directory Manager Password on RHEL 7 / CentOS 7

It is best practice to remember passwords, but because too many passwords, sometimes we forget. We are not encouraged to write the password on any paper or share the password...

How to Find Big Files Size on Linux RHEL/CentOS
How to Find Big Files Size on Linux RHEL/CentOS

As the linux administrator, sometimes we have to identify which files are most take much space in the linux server resulting in low free space. Low disk space can also...

Why Linux users should worry about malware and what they can do about it
Why Linux users should worry about malware and what they can do about it

Don’t drop your guard just because you’re running Linux. Preventing the spread of malware and/or dealing with the consequences of infection are a fact of life when using computers. If...

How to Reset Forgotten Root Password on Linux RHEL 7 / CentOS 7
How to Reset Forgotten Root Password on Linux RHEL 7 / CentOS 7

This short howto will explain the steps to reset a lost root password or to reset a forgotten root password on Linux RHEL 7 or CentOS 7. Basically, we will...

How to Update CentOS or Upgrade CentOS to the Latest Version
How to Update CentOS or Upgrade CentOS to the Latest Version

Recently, the latest version of CentOS 7.3 was released. All users of CentOS 7.0, 7.1 and 7.2 can upgrade their system to the most recent. This quick guide will explain...

How to Change your WordPress Username, Nickname and Display Name in MySQL
How to Change your WordPress Username, Nickname and Display Name in MySQL

After you create an account log in WordPress, you may want to change your WordPress username, as appropriate or due to security reason. However, you can not do this from...

How to Enable SSH Root Login on Ubuntu 16.04
How to Enable SSH Root Login on Ubuntu 16.04

As what we wrote in the previous article on how to allow SSH root on Ubuntu 14.04, after installing a fresh new copy of Ubuntu 16.04 LTS, we find that...

How to Change UUID of Linux Partition on CentOS 7
How to Change UUID of Linux Partition on CentOS 7

UUID (Universally Unique IDentifier) should be unique and it is used to identify storage devices on a linux system. If you cloned a virtual machine from vCenter, the metadata containing...

Leave a Reply

Your email address will not be published. Required fields are marked *