How To Install nohang on CentOS 8

nohang is Sophisticated low memory handler for Linux

Introduction

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

What is nohang

Nohang is a highly configurable daemon for Linux which is able to correctly prevent out of memory (OOM) and keep system responsiveness in low memory conditions. To enable and start systemctl enable –now nohang

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

Install nohang 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 nohang using dnf by running the following command:

sudo dnf -y install nohang

Install nohang 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 nohang using yum by running the following command:

sudo yum -y install nohang

How To Uninstall nohang on CentOS 8

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

sudo dnf remove nohang

nohang Package Contents on CentOS 8

/etc/logrotate.d/nohang
/etc/nohang/nohang.conf
/usr/bin/oom-sort
/usr/bin/psi-top
/usr/bin/psi2log
/usr/lib/systemd/system/nohang.service
/usr/sbin/nohang
/usr/share/doc/nohang
/usr/share/doc/nohang/CHANGELOG.md
/usr/share/doc/nohang/README.md
/usr/share/licenses/nohang
/usr/share/licenses/nohang/LICENSE
/usr/share/man/man1/oom-sort.1.gz
/usr/share/man/man1/psi-top.1.gz
/usr/share/man/man1/psi2log.1.gz
/usr/share/man/man8/nohang.8.gz
/usr/share/nohang/nohang.conf
/usr/share/nohang/version

References

Summary

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