How To Install memlockd on Ubuntu 20.04
Introduction
In this tutorial we learn how to install memlockd
on Ubuntu 20.04.
What is memlockd
memlockd is:
When a system starts paging excessively it may be impossible for the sysadmin to login for the purpose of killing the runaway processes (sometimes the login program times out due to thrashing). Memlockd allows important system files (such as /bin/login, /bin/getty, and the admin shell) to be locked in memory so that there will be no delay in accessing executable pages. In my tests this can decrease the time required for the administrator to login on a thrashing system by a factor of more than 3.
There are three methods to install memlockd
on Ubuntu 20.04. We can use apt-get
, apt
and aptitude
. In the following sections we will describe each method. You can choose one of them.
Install memlockd Using apt-get
Update apt database with apt-get
using the following command.
sudo apt-get update
After updating apt database, We can install memlockd
using apt-get
by running the following command:
sudo apt-get -y install memlockd
Install memlockd Using apt
Update apt database with apt
using the following command.
sudo apt update
After updating apt database, We can install memlockd
using apt
by running the following command:
sudo apt -y install memlockd
Install memlockd Using aptitude
If you want to follow this method, you might need to install aptitude first since aptitude is usually not installed by default on Ubuntu. Update apt database with aptitude
using the following command.
sudo aptitude update
After updating apt database, We can install memlockd
using aptitude
by running the following command:
sudo aptitude -y install memlockd
How To Uninstall memlockd on Ubuntu 20.04
To uninstall only the memlockd
package we can use the following command:
sudo apt-get remove memlockd
Uninstall memlockd And Its Dependencies
To uninstall memlockd
and its dependencies that are no longer needed by Ubuntu 20.04, we can use the command below:
sudo apt-get -y autoremove memlockd
Remove memlockd Configurations and Data
To remove memlockd
configuration and data from Ubuntu 20.04 we can use the following command:
sudo apt-get -y purge memlockd
Remove memlockd configuration, data, and all of its dependencies
We can use the following command to remove memlockd
configurations, data and all of its dependencies, we can use the following command:
sudo apt-get -y autoremove --purge memlockd
References
Summary
In this tutorial we learn how to install memlockd
package on Ubuntu 20.04 using different package management tools: apt
, apt-get
and aptitude
.