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I'm using the following CentOS:
$ cat /etc/centos-release
CentOS Linux release 7.0.1406 (Core)
The commands nmap, netstat and lsof are not found on CentOS7. Why?
$ type -a nmap
bash: type: nmap: not found
$ type -a netstat
bash: type: netstat: not found
$ type -a lsof
bash: type: lsof: not found
What should I do to make them work?
The package net-tools was deprecated in CentOS7 in favour of the iproute2 suite. You may either install it manually or check out this blogpost for replacement commands:
Here is the URL to Red Hat's Bugzilla for RHEL7 that covers the deprecation of netstat in more detail: https://bugzilla.redhat.com/show_bug.cgi?id=1119297
As stated before, net-tools are deprecated thus shouldn't be used unless necessary. Behaviour in RHEL 7 is the same as in Fedora - net-tools is missing from minimal install, but is in @base (~= @standard in Fedora) which is installed in all non-minimal configurations.
There are also other tickets that deal with this such as IDs 682308 and 687920. Note that they are assigned to the Fedora project and are quite old.
lsof directly in your answer
lsof was deprecated. It's just not installed by default. You can get it with yum install lsof.
Nov 18, 2015 at 16:01
just do:
yum install net-tools
Whenever you cannot find executables on a Red Hat based distro and you know their names, you should do 1 of the following 2 things.
You can search the YUM repositories that are available to your system by using the command repoquery. If it isn't installed, then do a yum install yum-utils.
$ repoquery -qf */nmap
nmap-2:6.40-4.el7.x86_64
From here you can see which packages have an executable with those names. Here's all of them at once.
$ repoquery -qf */netstat */lsof */nmap
net-tools-0:2.0-0.17.20131004git.el7.x86_64
ctdb-tests-0:2.5.1-2.el7.x86_64
lsof-0:4.87-4.el7.x86_64
nmap-2:6.40-4.el7.x86_64
ctdb-tests-0:2.5.1-2.el7.x86_64
Now just do a sudo yum install lsof or sudo yum install nmap to install these missing packages.
You can also do a similar search using yum search <executable>.
$ yum search netstat
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.advancedhosters.com
* extras: mirror.cisp.com
* updates: centos-mirror.jchost.net
================================================================== Matched: netstat ==================================================================
dstat.noarch : Versatile resource statistics tool
net-snmp.x86_64 : A collection of SNMP protocol tools and libraries
net-tools.x86_64 : Basic networking tools
With this approach you'll need to do a bit of digging to confirm that the resulting packages include the executable you're looking for. I typically look in there lit of files for what I want, but for that you'll have to use repoquery.
$ repoquery -ql net-tools.x86_64 | grep netstat
/bin/netstat
/usr/share/man/de/man8/netstat.8.gz
/usr/share/man/fr/man8/netstat.8.gz
/usr/share/man/man8/netstat.8.gz
/usr/share/man/pt/man8/netstat.8.gz
So using my first approach saves you the extra steps.
Apparently in CentOS 7 netstat, which is part of the package net-tools has been officially deprecated, so you should be using ss (part of the package iproute2), going forward.
Upvoted slm's answer, just making it easier to find the info I used. I wanted to do:
netstat -nlp | grep httpd
Instead, on CentOS 7 I just did:
ss -nlp | grep httpd
Which works, didn't even have to install it on CentOS 7 minimal.
Do "man ss" for usage details.
It seems that you simply don't have these tools installed. On CentOS, you should be able to install them easily with yum. Try this:
$ yum install nmap netstat
netstat has been deprecated in favor of ss. Doubt it'll go away any time soon, but just fyi. I'd bet that ss is installed already.