While I prefer nss-pam-ldapd for authentication and password resolution on Linux systems, sssd has a few advantages. I consider the biggest advantage of SSSD is the ability to cache credentials. I am going to assume you have a directory server up and running. If not, you can always follow my guides on installing OpenLDAP and… Read More »
You may want a version of Nginx that is newer than available in the repositories. As of today (2019 April 30), the latest version is 1.16.0. The Nginx developers maintain a yum repository with the latest version. I recommend using the repository because it will be easier to keep Nginx up to date. The Nginx… Read More »
The CentOS 7 repositories provide HAProxy version 1.5. You may want or need features in newer versions. Fortunately, installing HAProxy 1.9.7 from source is relatively straightforward. The steps to do so are: Install required packages Download the Lua source code Download the HAProxy source code Compile and install Lua Compile and install HAProxy Create an… Read More »
How the hostname is set is operating system specific. This is because the hostname is typically set by the startup process, and different operating systems have different startup processes. CentOS is no different. CentOS 7 uses systemd, while CentOS 6 uses upstart. This means how to change the hostname in CentOS depends on which major… Read More »
There are several ways to install an RPM on CentOS. This guide covers the command line programs yum and rpm. There are GUI tools, such as PackageKit, to manage packages, but since the command line tools will always be available, those are what I will cover. In most cases, you probably want to use yum.… Read More »
To temporarily disable SELinux on CentOS 7, run this command as root: root@centos7 ~]# setenforce 0 If you want to turn it back on, use the command: root@centos7 ~]# setenforce 1 This will not persist across a reboot. If you want it to be disabled when the system boots, edit /etc/sysconfig/selinux and replace this line:… Read More »
This guide will walk you through setting up CentOS 7 to use an LDAP directory server for authentication. This guide will not work with CentOS 8. If you want to use LDAP authentication with CentOS 8, click here. I am assuming you have a directory server up and running. If you don’t, you can follow… Read More »
This guide will walk you through installing OpenLDAP from source on CentOS 7. It should work with Red Hat Enterprise Linux (RHEL) 7, Oracle Linux 7, Scientific Linux 7, and any other RHEL clones. I am assuming you are able to use a command line shell and text editor on a UNIX like operating system.… Read More »