lsof command not found on CentOS 7 / RHEL 7 Server
lsof command not found
root@centos7 [/]# lsof -i :443
-bash: /usr/sbin/lsof: No such file or directory
[root@centos7 ~]# lsof -p 443
-bash: lsof: command not found
Error shows that lsof command is not installed on your server. Do the below steps to install lsof command on your CentOS 7 / Redhat 7 Server.
1. Log into your linux server via SSH as root
2. Install lsof package on the server using yum
3. Enter ‘y’ if yum ask for confirmation while installing lsof
Resolving Dependencies
–> Running transaction check
—> Package lsof.x86_64 0:4.87-6.el7 will be installed
–> Finished Dependency Resolution
Dependencies Resolved
==================================================================================================================================================================
Package Arch Version Repository Size
==================================================================================================================================================================
Installing:
lsof x86_64 4.87-6.el7 base 331 k
Transaction Summary
==================================================================================================================================================================
Install 1 Package
Total download size: 331 k
Installed size: 927 k
Is this ok [y/d/N]: y
Downloading packages:
lsof-4.87-6.el7.x86_64.rpm | 331 kB 00:00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : lsof-4.87-6.el7.x86_64 1/1
Verifying : lsof-4.87-6.el7.x86_64 1/1
Installed:
lsof.x86_64 0:4.87-6.el7
Complete!
Now lsof package is installed on your Linux Server.

lsof command not found – How to install lsof command
How to download and install lsof rpm on CentOS 7 / RHEL 7 server
1. Log into your CentOS 7 / RHEL 7 server as root user
2. Download lsof rpm from CentOS website using wget command
Saving to: ‘lsof-4.87-6.el7.x86_64.rpm’
100%[===============================>] 338,864 1.37MB/s in 0.2s
2020-11-17 17:55:42 (1.37 MB/s) – ‘lsof-4.87-6.el7.x86_64.rpm’ saved [338864/338864]
3. Install the downloaded rpm file either using yum or rpm command
yum command will lsof package and the required dependencies
Preparing… ################################# [100%]
Updating / installing…
1:lsof-4.87-6.el7 ################################# [100%]
You must first install the dependencies, if you are installing lsof package using rpm command.
lsof command need the below dependencies :
glibc
libselinux
The above dependencies will be installed by default on CentOS7 / RHEL7 server.