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How to check open ports in Linux using the CLI

last updated July 22, 2019 in CentOS, Debian / Ubuntu, Linux, Networking, RedHat and Friends, Security, Suse

I need to list all open ports in Linux cloud server. How do I check open ports in Linux using the CLI? Can you give me the command to check open ports in Linux operating system?

How to set up automatic updates for Ubuntu Linux 18.04

last updated July 22, 2019 in Linux, Ubuntu Linux

How do I configure automatic updates for Ubuntu Linux 18.04 LTS “Bionic Beaver” server?

Disable SELinux on CentOS 7 / RHEL 7 / Fedora Linux

last updated July 18, 2019 in CentOS, Linux, RedHat and Friends, SELinux

I need to disable SELinux on CentOS 7. How can I disable SELinux from the command line over ssh based session?

How to install LAMP on Debian 10 (Buster)

last updated July 15, 2019 in Apache, Debian / Ubuntu, Linux, MySQL, PHP

How do I install a LAMP stack on Debian 10 (Buster)?

How to delete a UFW firewall rule on Ubuntu / Debian Linux

last updated July 14, 2019 in Debian / Ubuntu, Iptables, Linux, Ubuntu Linux

How do I remove and delete a UFW firewall rule running on Ubuntu or Debian Linux?

Debian 10 Set Up OpenVPN Server In 5 Minutes

last updated August 22, 2019 in Cryptography, Debian / Ubuntu, Linux, OpenVPN

I am a new Debian Linux 10 server user. How do I set up an OpenVPN Server on Debian Linux version 10 server to shield my browsing activity from bad guys on public Wi-Fi, and more?

How to change hostname on Debian 10 Linux

last updated July 13, 2019 in Debian / Ubuntu, Linux

How do I change the hostname of a Debian Linux 10 “Buster” operating system permanently using the command line tools?