This guide will walk you through installing OpenLDAP from source on CentOS 8. It should work with Red Hat Enterprise Linux (RHEL) 8, Oracle Linux 8, 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. This guide was… Read More »
The OpenLDAP audit log overlay is used to track changes to a database. It stores its data in an LDIF file. On busy servers, consider setting up a cron job to automatically rotate, compress, or archive the log file. Setting up the OpenLDAP audit log overlay is pretty straightforward. There are only a few steps… Read More »
Zipping a Folder Use the zip command with the -r option to zip a folder on a Linux system. For example, to zip a folder named bigfiles, you would use the following command: $ zip -r bigfiles.zip bigfiles adding: bigfiles/ (stored 0%) adding: bigfiles/bigfile2 (deflated 98%) adding: bigfiles/bigfile3 (deflated 96%) adding: bigfiles/bigfile1 (deflated 97%) After… Read More »
To rename a file in Linux, you use the mv command. The mv command can also rename directories and move files into different directories. When using mv, always specify the current filename first, followed by one or more spaces, and last the new name. For example, to rename a file named my_file.pdf to your_file.pdf, use… Read More »
Increasing the size of a Disk in VirtualBox can be done with the GUI or the command line. I will cover both methods. Resizing the partitions and filesystems on the virtual machine using the disk is beyond the scope of this guide. Directly below are quick procedures. If you want a more in depth explanation… Read More »
The OpenLDAP password policy overlay allows administrators to implement password policies such as minimum length requirements and expirations. This guide explains how to use it and demonstrates with a few examples. The password policy overlay configuration is a bit different from other overlays. The configuration of most overlays takes place in the overlay entry of… Read More »
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 »
Adding a disk to LVM is pretty straightforward. The typical scenario is you have a virtual machine (VM) that is running low on space, so you add another virtual disk to it. Another possible scenario is adding another physical disk to create a software mirror. Perhaps you have a new host and wish to store… Read More »
Unless you are using some kind of management tool, you use ldapadd to add a user to an OpenLDAP database. Before doing so, you will need a few pieces of information: What type of user you are creating (e.g. POSIX or non-POSIX) The LDAP suffix of the database you wish to add the user to.… Read More »
How to change an OpenLDAP password depends on whether it is a regular user or an administrative user. The configuration directory and each database (with a few exceptions) have an administrative account. I will cover how to change all three. Run all of the commands in this guide on your directory server as the root… Read More »