nixCraft Linux & Unix - Newsletter 16/Dec/2018

[nixCraft]

Welcome to nixCraft Linux/Unix newsletter for Sunday, 16 December 2018. I hope you will enjoy this version of the newsletter.

• FreeBSD 12 released: Here is how to upgrade FreeBSD 11 to 12
  The FreeBSD project announces the availability of FreeBSD 12.0-RELEASE. It is the first release of the stable/12 branch. The new version comes with updated software and features for a wild variety of architectures. The latest release provides performance improvements and better support for FreeBSD jails and more. One can benefit greatly using an upgraded version of FreeBSD. 
   
• Microsoft is building Edge on top of Chromium (open source version of Google Chrome)
  It is official now. Microsoft is throwing away old code base of Edge browser and making next version of Edge browser on top of Chromium. The open source project behind Google Chrome is known as Chromium. Microsoft is building a Chromium browser to replace Edge on Windows 10 on both x86 and ARM-based systems. 
   
• Multiple vulnerabilities in FreeBSD NFS server code
  FreeBSD is a free and open source operating system. The NFS (Network File System) is a server and client application that turn FreeBSD into a file sharing server. Users can upload or update files on a remote NFS server. NFS is standard on NAS (network attached storage) devices or sharing data for web servers. A new bug found in NFS server code which could allow a remote attacker to crash the NFS server, resulting in a denial of service (DoS) attack. Another possibility is to execute arbitrary code on the server. 
   
• How to update LXD container Ubuntu image from 16.04 to 18.04
  The LXD container hypervisors supported and created by Ubuntu team. It provides 25% faster performance than ESX. This page shows how to upgrade LXD container Ubuntu 16.04 LTS image to 18.04 LTS image. 
   
• How to check RAID configuration in Linux
  I need to check RAID configuration in Linux. How do you check your current software RAID configuration in a Linux-based server powered by RHEL/CentOS or Debian/Ubuntu Linux? 
   
• Bash check if string starts with character such as #
  How do I check if variable begins with # in bash shell scripting running on a Linux or Unix-like operating systems? 
   
• How to secure Apache with Let’s Encrypt Certificates on RHEL 8
  I read that Let’s Encrypt is a free, automated, and open certificate for web server and other usages. How do I secure Apache with Let’s Encrypt Certificates on RHEL 8? 
   
• How To Install Linux, Apache, MySQL, PHP (LAMP) stack On RHEL 8
  How can I install Linux, Apache, MySQL/MariaDB, PHP (LAMP) stack On RHEL (Red Hat Enterprise Linux) 8? 
   
• How to install Nvidia driver on CentOS 7 Linux
  I am a new CentOS 7 Linux desktop user. I need to use Nvidia software for my video editing software and other purposes. How do I install the Nvidia driver on CentOS 7 Linux? 
   
• Bash get exit code of command on a Linux / Unix
  How do I get the exit code of Linux or Unix shell command and store it into a shell variable? 
   
• Bash read file names from a text file and take action
  How do I read filenames from a text file and take certain action on those files? 
   
• How to set up a firewall using FirewallD on RHEL 8
  I am a new Red Hat Enterprise Linux sysadmin. How do I set up a firewall using FirwallD on RHEL 8? 
   
• How to install and use Nginx on OpenSUSE Linux server
  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? 
   
• How to install and setup PostgreSQL on RHEL 8
  How do I install and setup PostgreSQL on RHEL 8 server using application streams? 
   
• Define ssh key per host using ansible_ssh_private_key_file
  Iset up SSH keys on a Linux or Unix as per my project needs and cloud hosting providers. I also new to Ansible IT automation and DevOps tool. My management node has keys for Linode, AWS/EC2 and Google cloud. How do I set up and tell Ansible to use different ssh keys? How do I configure SSH credentials per cloud hosting service provider? 
• How To Set Up SSH Keys on RHEL 8
  I am a new RHEL 8 server sysadmin. How do I configure SSH public key-based authentication for RHEL (Red Hat Enterprise Linux) 8 server? 
   
• How To Install MariaDB on RHEL 8
  I am a new MariaDB and RHEL 8 user. How do I install MariaDB on RHEL 8 server using the yum command? 
   
• How to update OpenSUSE Linux software and kernel using CLI
  I am a new OpenSUSE Linux server user. How do I upgrade and update OpenSUSE Linux software and kernel from the CLI? How do I use the command line tool to upgrade your system to the latest version of openSUSE software and kernel? 
   
• How To Find My Public IP Address From Command Line On a Linux
  How do I find out my public IP address on the Linux and OS X Unix command line to use with my own bash shell script without using third party web site? Is there command-line option which will show my dynamic IP address on a Ubuntu or Fedora Linux? 
   
• How To Find Out FreeBSD Version and Patch Level Number
  How do I find out my FreeBSD server version and patch level of the installed system using command line option? Can you tell us command to find out FreeBSD version and kernel patch level? 
   
• Linux Find Out What Process Are Using Swap Space
  The top and free command display the total amount of free and used physical and swap memory in the server. How do I determine which process is using swap space under Linux operating systems? How do I find out swap space usage of a particular process such as memcached? 
   
• Red Hat / CentOS Check and List Running Services Linux Command
  How do I list all currently running services in Fedora / RHEL / CentOS Linux server? How can I check the status of a service using systemd based CentOS/RHEL 7.x? 
   
• How to find a Word in Vim or vi text editor
  I am a new Linux and Unix-like operating system user. How do search and find words in Vi Vim? How can I find a Word in Vim or vi text editor? 
   
• How do I find out what shell I am using on Linux/Unix?
  What is the most reliable and simple way to get the current shell interpreter name on Linux or Unix-like system? How do I check how many shells are installed? How do I change the shell used from my Linux/Unix user account? 
   
• How To Install EPEL Repo on a CentOS and RHEL 7.x
  How do I install the extra repositories such as Fedora EPEL repo on a Red Hat Enterprise Linux server version 7.x or CentOS Linux server version 7.x? 
   
• Change Shell To Bash in Linux / Unix
  How do I switch from a ksh shell to bash on Linux or Unix system? How to change shells on Unix-like system? 
   
• Download a file with curl on Linux / Unix command line
  I am a new macOS Unix user. I am writing a small bash shell script. How do I download files straight from the command-line interface using curl? How can I download files with cURL on a Linux or Unix-like systems? 
   
• Regular Expressions In grep examples
  How do I use the grep command with regular expressions on a Linux and Unix-like operating systems? How do I use grep and regular expressions to search for text/ words in Linux? 

I would also like to wish all my readers happy holidays and a new year ahead.