nixCraft Linux & Unix - Newsletter 01/Oct/2019

[nixCraft]

Welcome to nixCraft Linux/Unix newsletter for Tuesday, 01 October 2019. I hope you will enjoy this version of the newsletter.

• CentOS Linux 8 released: New Features and Download {trading}
  CentOS Linux 8 released. It is a Linux distro derived from RHEL 8. CentOS was created when Red Hat stopped providing RHEL free. These days CentOS mostly used on servers, HPC, and desktop. CentOS is a high-quality Linux distribution. It gives complete control of its open-source software packages and is fully customized for research needs or for running a high-performance website without the need for license fees. Let us see what’s new in CentOS 8.
   
• Bash Pass Shell Variables To Awk Script {trading}
  AWK is a potent scripting tool for Linux/Unix developers and sysadmins. Often you need to pass shell variables to awk. This page explains various ways to pass shell variable to an awk script/command
   
• How to verify NTP is working Or not (Check Status of NTP)
  Keeping correct time is important on a server and client system. You can use any one of the following program to verify that ntp client configuration is working correctly on Linux or Unix-like systems.
   
• How To Add Jobs To cron Under Linux or UNIX
  Cron allows Linux and Unix users to run commands or scripts at a given date and time. You can schedule scripts to be executed periodically.
   
• How to set up a firewall using FirewallD on CentOS 8 {trading}
  I am a new CentOS Enterprise Linux 8 sysadmin. How do I set up a firewall using FirwallD on CentOS 8?
   
• How To Protect SSH With Fail2Ban on CentOS 8 {trading}
  My ssh log file shows too many password failures. Random IP address trying to brute force my sshd server running on CentOS 8 server. How do I protect ssh with fail2ban on CentOS 8 Linux server? How do I install Fail2Ban on CentOS 8?
   
• Nginx Redirect HTTP To HTTPS with Rewrite 301 Rules
  I have setup nginx as a secure reverse proxy server. How do I redirect all http://example.com/ requests (traffic) to https://example.com/ under nginx web server? How do I configure Nginx to redirect HTTP To HTTPS?
   
• FreeBSD Install sudo Command To Execute Commands
  How do I install sudo command under a FreeBSD 9.x/10.x/11.x/12.x system?
   
• How to display line number in vim
  How do I display line numbers in vim running on Linux or Unix-like operating systems?
   
• How to install curl on Debian Linux 10/9/8
  I am a new Debian Linux 10 or 9 user. I switched from Windows server and I trying to run the curl command from a shell script but getting the following error:
  bash: curl: command not found
  How do I fix this on a Debian Linux version 10 or 9/8?
   
• SUSE 15 update installed packages for security
  I would like to update installed packages for security on SUSE 15 (SUSE Linux Enterprise Server) server. How can I update my SUSE 15 system using zypper command?
   
• OpenBSD Install BASH Shell Package Command
  How do I install BASH shell package under OpenBSD operating system? How do I set bash as a default login shell under OpenBSD?
   
• Linux run a command with a time limit (timeout) {trading}
  I want to start command called foo, and kill it if still running after given DURATION in seconds. How do I run a command a time Limit on Linux? How do I run a Linux command, and have it timeout (abort) after N seconds?
   
• How To Enable and Install EPEL Repo on CentOS 8.x 
  How do I install the extra repositories such as Fedora EPEL repo on a CentOS Enterprise Linux server version 8.x? How to enable EPEL repo on CentOS 8.x?

Until next time.