How To Install incron on CentOS 8

incron is Inotify cron system

Introduction

In this tutorial we learn how to install incron on CentOS 8.

What is incron

This program is an “inotify cron” system. It consists of a daemon and a table manipulator. You can use it a similar way as the regular cron. The difference is that the inotify cron handles filesystem events rather than time periods.

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

Install incron on CentOS 8 Using dnf

Update yum database with dnf using the following command.

sudo dnf makecache --refresh

The output should look something like this:

CentOS Linux 8 - AppStream                                       43 kB/s | 4.3 kB     00:00    
CentOS Linux 8 - BaseOS                                          65 kB/s | 3.9 kB     00:00    
CentOS Linux 8 - ContinuousRelease                               43 kB/s | 3.0 kB     00:00    
CentOS Linux 8 - Extras                                          23 kB/s | 1.5 kB     00:00    
CentOS Linux 8 - FastTrack                                       40 kB/s | 3.0 kB     00:00    
CentOS Linux 8 - HighAvailability                                36 kB/s | 3.9 kB     00:00    
CentOS Linux 8 - Plus                                            24 kB/s | 1.5 kB     00:00    
CentOS Linux 8 - PowerTools                                      50 kB/s | 4.3 kB     00:00    
Extra Packages for Enterprise Linux Modular 8 - x86_64           13 kB/s | 9.2 kB     00:00    
Extra Packages for Enterprise Linux 8 - x86_64                   24 kB/s | 8.5 kB     00:00    
Metadata cache created.

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

sudo dnf -y install incron

Install incron on CentOS 8 Using yum

Update yum database with yum using the following command.

sudo yum makecache --refresh

The output should look something like this:

CentOS Linux 8 - AppStream                                       43 kB/s | 4.3 kB     00:00    
CentOS Linux 8 - BaseOS                                          65 kB/s | 3.9 kB     00:00    
CentOS Linux 8 - ContinuousRelease                               43 kB/s | 3.0 kB     00:00    
CentOS Linux 8 - Extras                                          23 kB/s | 1.5 kB     00:00    
CentOS Linux 8 - FastTrack                                       40 kB/s | 3.0 kB     00:00    
CentOS Linux 8 - HighAvailability                                36 kB/s | 3.9 kB     00:00    
CentOS Linux 8 - Plus                                            24 kB/s | 1.5 kB     00:00    
CentOS Linux 8 - PowerTools                                      50 kB/s | 4.3 kB     00:00    
Extra Packages for Enterprise Linux Modular 8 - x86_64           13 kB/s | 9.2 kB     00:00    
Extra Packages for Enterprise Linux 8 - x86_64                   24 kB/s | 8.5 kB     00:00    
Metadata cache created.

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

sudo yum -y install incron

How To Uninstall incron on CentOS 8

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

sudo dnf remove incron

incron Package Contents on CentOS 8

/etc/incron.conf
/etc/incron.d
/usr/bin/incrontab
/usr/lib/.build-id
/usr/lib/.build-id/30
/usr/lib/.build-id/30/a7375162400be911a4c722b481745ef4c630fb
/usr/lib/.build-id/e8
/usr/lib/.build-id/e8/bf77891d086280905d7afbf116ed398caa157b
/usr/lib/systemd/system/incrond.service
/usr/sbin/incrond
/usr/share/doc/incron
/usr/share/doc/incron/CHANGELOG
/usr/share/doc/incron/README
/usr/share/doc/incron/TODO
/usr/share/licenses/incron
/usr/share/licenses/incron/COPYING
/usr/share/licenses/incron/LICENSE-GPL
/usr/share/man/man1/incrontab.1.gz
/usr/share/man/man5/incron.conf.5.gz
/usr/share/man/man5/incrontab.5.gz
/usr/share/man/man8/incrond.8.gz
/var/spool/incron

References

Summary

In this tutorial we learn how to install incron on CentOS 8 using yum and dnf.