I've just started using a VPS (Virtual Private Server) with CentOS 5.0 i386 as the virtual server operating system, but it has a pretty minimal operating system install. When I went to run the nslookup command to look up an IP address I got the error message nslookup: command not found as shown in the example below.
$ nslookup www.google.com bash: nslookup: command not found
So I obviously needed to install the package that contains the nslookup tool. Unfortunately doing yum search nslookup didn't produce any results. I know from using other Linux distros that nslookup is usually part of the bind tools library, so did a yum search bind and managed to find this package:
bind-utils.i386 30:9.3.3-9.0.1.el5 updates Matched from: bind-utils Bind-utils contains a collection of utilities for querying DNS (Domain Name System) name servers to find out information about Internet hosts. These tools will provide you with the IP addresses for given host names, as well as other information about registered domains and network addresses. You should install bind-utils if you need to get information from DNS name servers. http://www.isc.org/products/BIND/
Aha, this looked promising, so a quick yum install bind-utils should do the trick:
$ yum install bind-utils Loading "installonlyn" plugin Setting up Install Process Setting up repositories base 100% |=========================| 1.1 kB 00:00 updates 100% |=========================| 951 B 00:00 centosplus 100% |=========================| 951 B 00:00 addons 100% |=========================| 951 B 00:00 extras 100% |=========================| 1.1 kB 00:00 Reading repository metadata in from local files Parsing package install arguments Resolving Dependencies --> Populating transaction set with selected packages. Please wait. ---> Package bind-utils.i386 30:9.3.3-9.0.1.el5 set to be updated --> Running transaction check Dependencies Resolved ============================================================================= Package Arch Version Repository Size ============================================================================= Installing: bind-utils i386 30:9.3.3-9.0.1.el5 updates 162 k Transaction Summary ============================================================================= Install 1 Package(s) Update 0 Package(s) Remove 0 Package(s) Total download size: 162 k Is this ok [y/N]:
So now that bind-utils was installed, it was just a matter of running nslookup again to test and see if I actually had the tool I needed installed:
$ nslookup www.google.com Server: 210.55.4.10 Address: 210.55.4.10#53 Non-authoritative answer: www.google.com canonical name = www.l.google.com. Name: www.l.google.com Address: 74.125.19.104 Name: www.l.google.com Address: 74.125.19.147 Name: www.l.google.com Address: 74.125.19.99 Name: www.l.google.com Address: 74.125.19.103
That looks good!