nixCraft - Linux and Unix tutorials for new and seasoned sysadmin

Linux bash exit status and how to set exit status in bash

last updated March 7, 2019 in BASH Shell, CentOS, Debian / Ubuntu, FreeBSD, Linux, Suse, UNIX

Can you explain bash exit status code? How do I set bash exit status in my Linux shell scripts?

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 install htop on Alpine Linux using apk

last updated March 6, 2019 in Alpine Linux, Linux, Package Management

I am a new user of Alpine Linux. How do I install htop on Alpine Linux using the apk command?

Configure Ubuntu Pi-hole for Cloudflare DNS over HTTPS

last updated March 3, 2019 in Debian / Ubuntu, OpenVPN, Ubuntu Linux

I installed OpenVPN VPN solutions on Ubuntu for my businesses to secure all data communications. I also set up Pin-hole ad blocker on Ubuntu server along with OpenVPN. How do I force Pi-hole to use Cloudflare DNS over HTTPS (DoH) to increase my privacy and security by preventing eavesdropping and manipulation of DNS data by man-in-the-middle attacks?

Perl: warning: Setting locale failed in Debian and Ubuntu

last updated March 4, 2019 in Debian / Ubuntu, Linux, Troubleshooting

I am trying to install package and doing some other work. But, getting the error that read as “perl: warning: Setting locale failed. perl: warning: Please check that your locale settings:” How do I fix this problem on my Debian Linux server?

How to find Intel NUC BIOS version and model on Linux

last updated January 26, 2019 in BASH Shell, CentOS, Debian / Ubuntu, Hardware, Linux, RedHat and Friends, Suse

I installed Linux on Intel NUC. I need to find Intel NUC BIOS version. How do I find out BIOS version, date, and model name of my Intel NUC using Linux command-line options?

Install Google Chrome 72 on CentOS 7 using yum command

last updated January 31, 2019 in CentOS, Linux, Package Management

I am a new CentOS Linux 7 desktop user. How do I install Google Chrome 72 on CentOS 7 Linux desktop?