nixCraft Linux / UNIX Newsletter

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How to test and validate DNSSEC using dig command line

Posted: 11 Dec 2019 11:10 AM PST

How do I test and validate DNSSEC using the dig command line under Linux, macOS, *BSD, and Unix-like systems?

The post How to test and validate DNSSEC using dig command line appeared first on nixCraft.

How to add bash auto completion in CentOS 8 Linux

Posted: 11 Dec 2019 09:23 AM PST

I set up a new cloud server, but my auto-completion of bash shell commands are not working. How do I enable autocomplete feature in CentOS 8 (CentOS Enterprise Linux 8)? How do I write simple bash completion code in CentOS 8?

The post How to add bash auto completion in CentOS 8 Linux appeared first on nixCraft.

How to set rsync speed limit from eating all bandwidth

Posted: 11 Dec 2019 07:15 AM PST


The rsync command is eating all my bandwidth from a backup script and generating tons of I/O. How do I set a limit for file transfer speed of rsync command on Linux or Unix-like system? How can I keep my rsync script from using all of my bandwidth?

The post How to set rsync speed limit from eating all bandwidth with -bwlimit option appeared first on nixCraft.

How to set rsync speed limit from eating all bandwidth

Posted: 11 Dec 2019 07:15 AM PST


The rsync command is eating all my bandwidth from a backup script and generating tons of I/O. How do I set a limit for file transfer speed of rsync command on Linux or Unix-like system? How can I keep my rsync script from using all of my bandwidth?

The post How to set rsync speed limit from eating all bandwidth with -bwlimit option appeared first on nixCraft.

How To Set up OpenVPN Server In 5 Minutes on Ubuntu Linux

Posted: 11 Dec 2019 07:10 AM PST


{Updated} I am a new Ubuntu Linux server user. How do I setup an OpenVPN Server on Ubuntu Linux version 14.04/19.10, or 16.04/18.04 LTS server to shield my browsing activity from bad guys on public Wi-Fi, and more?

The post How To Set up OpenVPN Server In 5 Minutes on Ubuntu Linux appeared first on nixCraft.

Add / Create a Sudo User on CentOS Linux 8

Posted: 03 Dec 2019 10:30 AM PST

How do I add / create a sudo user on CentOS Linux 8 using the command line?

The post Add / Create a Sudo User on CentOS Linux 8 appeared first on nixCraft.

Vi / Vim Save And Quit The Editor Command

Posted: 02 Dec 2019 11:34 PM PST


{Updated} I am a new vi / vim text editor user. How do I quit the vi editor and save my changes under a Linux or Unix like operating systems? Can you tell me command to save and quit file in vim?

The post Vi / Vim Save And Quit The Editor Command appeared first on nixCraft.

Understanding /etc/passwd File Format

Posted: 02 Dec 2019 11:50 AM PST


Can you explain /etc/passwd file format for Linux and Unix-like operating systems?

The post Understanding /etc/passwd File Format appeared first on nixCraft.

How to install and use Nginx on OpenSUSE Linux server

Posted: 02 Dec 2019 11:13 AM PST


How do I install and configure the latest version of Nginx web server on OpenSUSE Linux server using the CLI and host a static site?

The post How to install and use Nginx on OpenSUSE Linux server appeared first on nixCraft.

How to add or mount directory in LXD (Linux container)

Posted: 02 Dec 2019 10:55 AM PST

I have two LXD containers running. One is for Nginx, and another is for processing data. I need to share data between two containers. How do I add or mount a shared directory between two?

The post How to add or mount directory in LXD (Linux container) appeared first on nixCraft.

Debian / Ubuntu Linux Delete Old Kernel Images Command

Posted: 01 Dec 2019 12:27 PM PST


I am a new Ubuntu Linux user and noticed that old kernel still exists in my system. Why doesn't Ubuntu remove old kernels automatically? How do I delete old unused kernel images to free disk space. How to remove unused old kernel images on Ubuntu Linux safely?

The post Debian / Ubuntu Linux Delete Old Kernel Images Command appeared first on nixCraft.

Configure Nginx to use TLS 1.2 and 1.3 only

Posted: 01 Dec 2019 12:05 PM PST

How do I enable and configure TLS 1.2 and 1.3 only in Nginx web server?

The post Configure Nginx to use TLS 1.2 and 1.3 only appeared first on nixCraft.

How to set up a firewall using FirewallD on OpenSUSE Linux

Posted: 01 Dec 2019 07:07 AM PST

I am a new OpenSUSE Linux 15.x sysadmin. How do I set up a firewall using FirwallD on OpenSUSE Linux 15.1?

The post How to set up a firewall using FirewallD on OpenSUSE Linux appeared first on nixCraft.