RHEL 8 HowTo - Linux / Unix Q & A from nixCraft

How to install whois on RHEL 8 / CentOS 8

last updated October 1, 2019 in CentOS, Linux, Package Management, RedHat and Friends

I deployed RHEL 8 in the cloud server. However, I am unable to find the whois command on my newly created RHEL 8 Linux server. It says ‘-bash: whois: command not found‘ I tried yum install whois, but it failed too. How do I install whois command on RHEL/CentOS 8 Linux using the command line?

RHEL 8 update installed packages for security

last updated September 16, 2019 in Linux, Package Management, RedHat and Friends, Security

I would like to update installed packages for security on RHEL 8.x (Red Hat Enterprise Linux) server. How can I update my RHEL 8.x system using yum command?

How to install htop on RHEL 8 using yum

last updated September 14, 2019 in Linux, RedHat and Friends

I am a new user of Red Hat Enterprise Linux 8. How do I install htop on RHEL 8 using the yum command?

How To Install EPEL Repo on an RHEL 8.x

last updated September 16, 2019 in Linux, Package Management, RedHat and Friends

How do I install the extra repositories such as Fedora EPEL repo on an Red Hat Enterprise Linux server version 8.x?

Linux disable firewall command

last updated April 16, 2019 in Iptables, Linux, Networking, Security

I am a new Linux system administrator. I have a hardware-based firewall, so I don’t need a firewall on each server. How do I disable the firewall on Linux?

RHEL 8 install Python 3 or Python 2 using yum

last updated March 5, 2019 in Package Management, Python, RedHat and Friends

I need to install Python 3 for Ansible IT automation tool on RHEL 8. How do I install Python 3 on RHEL 8? Is it possible to install Python 2 for legacy apps on RHEL 8?

How to secure Apache with Let’s Encrypt Certificates on RHEL 8

last updated October 2, 2019 in Apache, Linux, RedHat and Friends, Security

I read that Let’s Encrypt is a free, automated, and open certificate for web server and other usages. How do I secure Apache with Let’s Encrypt Certificates on RHEL 8? How can I set up Let’s Encrypt Certificates on Red Hat Enterprise Linux version 8.x?