How To Install knock on Rocky Linux 8

In this tutorial we learn how to install knock on Rocky Linux 8. knock is A port-knocking server/client

Introduction

In this tutorial we learn how to install knock on Rocky Linux 8.

What is `knock`

This is a port-knocking server/client. Port-knocking is a method where a server can sniff one of its interfaces for a special “knock” sequence of port-hits. When detected, it will run a specified event bound to that port knock sequence. These port-hits need not be on open ports, since we use libpcap to sniff the raw interface traffic. This package contains the knock client.

We can use yum or dnf to install knock on Rocky Linux 8. In this tutorial we discuss both methods but you only need to choose one of method to install knock.

Install knock on Rocky Linux 8 Using dnf

Update yum database with dnf using the following command.

sudo dnf makecache --refresh

After updating yum database, We can install knock using dnf by running the following command:

sudo dnf -y install knock

Install knock on Rocky Linux 8 Using yum

Update yum database with yum using the following command.

sudo yum makecache --refresh

After updating yum database, We can install knock using yum by running the following command:

sudo yum -y install knock

How To Uninstall knock on Rocky Linux 8

To uninstall only the knock package we can use the following command:

sudo dnf remove knock

knock Package Contents on Rocky Linux 8

/usr/bin/knock
/usr/lib/.build-id
/usr/lib/.build-id/5d
/usr/lib/.build-id/5d/378d4b8d74ed973cb6f455bb449ead8b8ee896
/usr/share/doc/knock
/usr/share/doc/knock/COPYING
/usr/share/doc/knock/ChangeLog
/usr/share/doc/knock/README.md
/usr/share/doc/knock/TODO
/usr/share/licenses/knock
/usr/share/licenses/knock/COPYING
/usr/share/man/man1/knock.1.gz

References

knock website

Summary

In this tutorial we learn how to install knock on Rocky Linux 8 using yum and dnf.