Linux ACL permissions are based on the draft POSIX 1003.1e. Even though ACLs are in use, the standard never made it out of the draft status. I assume you have a solid grasp on regular file permissions. If not, I suggest reading my guide on the topic before working with ACLs. Use Cases Access control… Read More »
Discussing mebibytes vs megabytes can easily segue into other topics, but I’ll keep this short and to the point. The short answer is a megabyte is 1,000,000 bytes while a mebibyte is 1,048,576 bytes. Mega is the SI prefix for 1,000,000. Mebi is the IEC prefix for 220. The IEC versions of the other SI… Read More »
Listing files in a package with dnf is easy. Just follow the example below: # dnf repoquery -l crontabs Last metadata expiration check: 0:12:18 ago on Sat 04 Jan 2020 09:40:27 AM EST. /etc/cron.daily /etc/cron.hourly /etc/cron.monthly /etc/cron.weekly /etc/crontab /etc/sysconfig/run-parts /usr/bin/run-parts /usr/share/licenses/crontabs /usr/share/licenses/crontabs/COPYING /usr/share/man/man4/crontabs.4.gz /usr/share/man/man4/run-parts.4.gz Replace crontabs with the name of the package you wish to… Read More »
UPDATE 2023 April 12: I was going to build RPMs to post here, but found that MATE packages are available in EPEL. Follow the instructions here for setting up the EPEL repositories. I am going to leave the instructions up to assist package maintainers and for anyone interested in the process of building a major… Read More »
I am assuming you just increased the size of a disk on a virtualization platform such as VMware or VirtualBox. Perhaps it is a SAN device. Either way, you will follow the same process. If your machine is on a SAN or it is a virtual machine running on a hypervisor that supports online resizing,… Read More »
I couldn’t find a Tomcat package in the standard repositories or EPEL, so I will walk you through installing Tomcat on CentOS 8. It is a relatively straightforward process. The latest version available at the time of writing (2019 November 23) is 9.0.29, so that is the version I will use in the examples. All… Read More »
The CentOS 8 repositories provide HAProxy version 1.8.15. You may want or need features in newer versions. Fortunately, installing HAProxy 2.0.9 (Latest stable version as of 2019 November, 21) from source is relatively straightforward. The steps to do so are: Install required packages Download the HAProxy source code Compile and install HAProxy Create an unprivileged… Read More »
This guide will walk you through setting up CentOS 8 to use an LDAP directory server for authentication. I am assuming you have a directory server up and running. If you don’t, you can follow these two guides to install and configure OpenLDAP: Install OpenLDAP From Source – CentOS 8 Configure OpenLDAP In this guide,… Read More »
With both DNF and YUM, there are three ways to remove repositories. One of the methods is specific to RHEL. If you are on a system that doesn’t have the dnf command, you can use the yum command instead. Using subscription-manager The subscription-manager program is specific to RHEL and specific to repositories maintained by Red… Read More »
Listing installed packages with dnf is straightforward. Unlike rpm, dnf also shows you the repository packages were installed from. The following example demonstrates listing all packages installed on a system. # dnf list installed Installed Packages acl.x86_64 2.2.53-1.el8 @anaconda audit.x86_64 3.0-0.10.20180831git0047a6c.el8 @anaconda audit-libs.x86_64 3.0-0.10.20180831git0047a6c.el8 @anaconda The left column displays the name of the package along… Read More »