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  • Open HTTP 80 and HTTPS 443 ports in firewalld on CentOS 8

    Do you want to open ports HTTP and HTTPS in firewalld? In this tutorial, I will explain how to open...
  • How to upgrade CentOS 7 to CentOS 8 Linux

    This tutorial will guide you step-by-step to upgrade CentOS 7 to Centos 8. Step 1:  Boot up any CentOS 7...
  • “firewall-cmd: command not found” on CentOS 8 [Solved]

    Recently I started a CentOS 8 VM on my OpenStack setup. When trying to configure firewall rules using firewall-cmd,  encountered...
  • How to Install Certbot on CentOS Stream 8 [Let’s Encrypt]

    In 2017, we wrote an article on migrating to Let’s Encrypt from StarSSL and also you’ll see a number of...
  • Upgrade CentOS 8 to CentOS Stream

    As you all know, CentOS 8 has reached its EOL on 31st Dec 2021, it’s time to upgrade your CentOS...
  • How to Install xclip on CentOS 8

    I recently started using CentOS 8 on my server and I couldn’t see the package xclip installed on CentOS 8...
  • Failed to download metadata for repo ‘AppStream’ [CentOS]

    I had installed a minimalist CentOS 8 on one of my servers. Installation went successful, however, when I tried to...
  • [CentOS 7 Apache]: Permission denied: file permissions deny server access

    Whenever I configure Apache on CentOS 7, most of the time I get “(13) Permission denied: file permissions deny server...
  • How to Install/Update PHP to 7.4 on CentOS 7

    Recently while looking onto my client’s WordPress dashboard, found a notification that the PHP version might be vulnerable and needs...
  • Installing WSO2 API Manager on CentOS

    WSO2 API Manager is an Open Source-based API Gateway that allows the development teams to deploy and monitor APIs and...
  • Install MySQLnd extension for PHP 7.2.3 on PPC64LE with CentOS 7

    I had installed PHP from source on PPC64LE with CentOS. I had enabled the MySQLi extension during configure options. For...
  • Install phpseclib packages Net_SSH2 and Net_SFTP on PPC64LE with CentOS 7

    I was deploying a web application on PPC64LE architecture with CentOS 7. As the machine wasn’t set up with web...
  • Install Oniguruma on PPC64LE machine with CentOS

    Have you ever tried installing Oniguruma on POWER PC with CentOS 7? Well, I did that and it was a...
  • Automatically start OpenCA service via Systemd in CentOS 7

    OpenCA service can be started using the SysVinit script located inside openca/etc/init.d folder. However, the script has to be started...
  • Systemctl replaces Chkconfig and Service commands in CentOS 7

    From our previous experience of CentOS/RedHat, we all knew that “chkconfig“ command is used for checking and updating runlevel information...
  • ifconfig command not found on CentOS 7 Minimal installation

    I have been using ifconfig command to configure network interfaces, enable or disable interface, display IP address information, change MAC...
  • Why hosts.allow not working on CentOS 7 Minimal installation

    Here’s a question asked by Gokul, one of the regular reader at Techglimpse – hosts.allow not working on CentOS 7...
  • How to upgrade OpenSSL v1.0.1e to v1.0.2 on CentOS/RHEL

    OpenSSL is an open source toolkit that provides tons of functionalities for Secure Socket Layer (SSL) and Transport Layer Security (TLS)...
  • Upgrade PHP 5.3 to PHP 7.0 using yum on CentOS/RHEL/Fedora

    My web server was running PHP version 5.3 for a long time and now I would like to en-cash the...
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