CentOS related tutorial/FAQ

Linux find Windows 10 OEM product key command

last updated January 17, 2020 in CentOS, Debian / Ubuntu, Linux, RedHat and Friends, Suse, Ubuntu Linux, Windows

I removed and installed Ubuntu Linux 16.04 LTS on my development Lenovo laptop. However, I need to use my Windows 10 pro in KVM VM for running the accounting app. How do I find and print my embedded Windows 10 pro key from a Linux command line option? How can I retrieve Microsoft Windows 8 and 10 OEM product key from BIOS?

Add a new user account with admin access on Linux

last updated January 17, 2020 in CentOS, Debian / Ubuntu, Linux, RedHat and Friends, User Management

How do I add a user account with admin (sudo) access on Ubuntu or CentOS Linux cloud server? How can I add a new user with admin account level access in Linux?

How to configure Nginx with Let’s Encrypt on CentOS 8

last updated December 30, 2019 in CentOS, Linux, Nginx, openssl

How do I secure my Nginx web server with Let’s Encrypt free ssl certificate on my CentOS 8 server? How to set up and configure Nginx with Let’s Encrypt on CentOS 8?

How do I count how many processes are running in Linux?

last updated December 21, 2019 in BASH Shell, CentOS, Commands, FreeBSD, Linux, RedHat and Friends, Suse, Ubuntu Linux, UNIX

How do I see how many processes are running in Linux? How can count all running processes in Linux?

CentOS 8 update installed packages for security

last updated December 17, 2019 in CentOS, Linux, Package Management, Security

I need to update installed packages for security on CentOS 8.x (CentOS Enterprise Linux) server. How can I update my CentOS 8.x system using yum command?

How to install tar on RHEL/CentOS 6/7/8 using yum

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

I am trying to extract a file using ‘tar xvf file.tar.gz’ syntax, but I am getting an error:
bash: tar: command not found
How do I fix this problem? How can I install tar on a CentOS/RHEL version 8, 7 or 6 desktop using yum command?

How to Install PHP 7.x on CentOS 8 For Nginx

last updated December 30, 2019 in CentOS, Linux, Nginx, PHP

How do I install PHP 7.x on CentOS 8 Linux server along with Nginx? How can I install the latest version of PHP 7.4 on CentOS Enterprise Linux 8 server?

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