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 foundFindings:
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.
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!