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

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 December 14, 2018 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 To Install Linux, Apache, MySQL, PHP (LAMP) stack On RHEL 8

last updated December 14, 2018 in Apache, Linux, MySQL, PHP, RedHat and Friends

How do I set up a LAMP stack on RHEL 8 cloud server or VPS or bare metal server? How can I install Linux, Apache, MySQL/MariaDB, PHP (LAMP) stack On RHEL (Red Hat Enterprise Linux) 8?

How to set up a firewall using FirewallD on RHEL 8

last updated December 3, 2018 in Linux, Networking, RedHat and Friends, Security

I am a new Red Hat Enterprise Linux sysadmin. How do I set up a firewall using FirwallD on RHEL 8?

How to install and setup PostgreSQL on RHEL 8

last updated December 1, 2018 in PostgreSQL, RedHat and Friends

How do I install PostgreSQL relational database management on RHEL 8 using the command line? How do I install and setup PostgreSQL on RHEL 8 server using application streams?

How To Set Up SSH Keys on RHEL 8

last updated November 30, 2018 in Cryptography, Linux, OpenBSD, RedHat and Friends

I am a new RHEL 8 server sysadmin. How do I configure SSH public key-based authentication for RHEL (Red Hat Enterprise Linux) 8 server?