nixCraft Linux & Unix - Newsletter 27/Nov/2018

[nixCraft]

Welcome to nixCraft Linux/Unix newsletter for Tuesday, 27 November 2018. I hope you will enjoy this version of the newsletter. 

• Raspberry $25 Pi 3 Model A+ Released – Complete specs and pricing
  The Raspberry Pi is a small single-board computer (SBC) developed by the Raspberry Pi Foundation. It supposes to promote the teaching of computer science, programming for kids and in developing countries. The new Raspberry Pi 3 Model A+ comes with 1.4GHz clock speed, 5GHz wireless networking and improved thermals of Raspberry Pi 3B+ in a smaller form factor. It costs $25.
   
• KDE has been deprecated in RHEL 7.6 and future version of RHEL
  Red Hat Enterprise Linux is well known to set defaults across the industry. For example, RHEL pushed systemd so hard that all other Linux distro adopted for good or bad reasons. Now Red Hat announced that KDE Plasma Workspaces (KDE) been deprecated from RHEL 7.6 and all future version of RHEL.
   
• Book Review: Absolute FreeBSD (3rd Edition)
  FreeBSD is a free and open source operating system for many different kinds of computers. FreeBSD’s based upon BSD, the version of UNIX developed at the University of California, Berkeley. FreeBSD is an alternative to Linux or Windows-based system. You can run almost all apps written in Perl, Python, PHP and other programming languages. FreeBSD heavily used by Netflix, EMC, IBM, Juniper, NetApp, Apple, Sony, and others. Absolute FreeBSD (3rd ed) book aims to be the complete guide to FreeBSD. Let us see why Michael W. Lucas’ FreeBSD system administration books so favorite among Unix lovers.
   
• How to configure a static IP address on RHEL 8
  I am a new sysadmin and RHEL 8 user. My system is configured to use DHCP. How can I switch from DHCP to a static IP address on RHEL 8 system? How do I setup a static TCP/IP address on my Red Hat Enterprise Linux 8 server using command line option?
   
• How to install and configure memcached on Ubuntu Linux 18.04
  I would like to reduce the load on my MariaDB/MySQL/PostgreSQL server using memcached. How do I install and configure memcached server on Ubuntu Linux 18.04 LTS?
   
• How to upgrade Ubuntu 16.04 to 18.04 LTS using terminal
  I am using Ubuntu Linux 16.04 LTS on Lionde. How do I upgrade Ubuntu 16.04 to 18.04 LTS using terminal bash shell over ssh based session?
   
• How to setup a UFW firewall on Ubuntu 18.04 LTS server
  How do I setup a firewall with UFW (uncomplicated firewall) on an Ubuntu Linux 18.04 LTS server to restrict traffic on my personal Ubuntu web-server that hosts my cat’s blog? How do I set up a firewall with UFW on Ubuntu 18.04 LTS?
   
• How to install and activate Cockpit web console on RHEL 8
  How do I install and enable Cockpit that makes GNU/Linux and RHEL 8 for web management purpose? How do I see and manage my RHEL 8 based server in a web browser and perform system tasks with a mouse?
   
• How to add bash auto completion in RHEL 8 (Red Hat Linux)
  I set up a new RHEL 8 VM from cloud images, but my auto-completion of bash shell commands are not working. How do I enable autocomplete feature in RHEL 8 (Red Hat Enterprise Linux 8)? How do I write simple bash completion code in RHEL 8?
• How to remove hidden files in Linux
  I am a new Linux sysadmin and Ubuntu Linux user. How can I remove hidden files in Linux? How do I delete hidden files in Linux starting with . (dot) character?
   
• Bash foreach loop examples for Linux / Unix
  I used foreach on a Unix operating system and csh shell loop. Now, I am a Linux operating system. How do I use foreach loop in bash shell running on Linux?
   
• Bash check if process is running or not on Linux / Unix
  I am new to Linux shell scripting. I am using a CentOS 7 Linux and Ubuntu 18.04 LTS server in the cloud. How do I check if a process is running or not on Linux? How do I determine whether a process is running or not in a shell script running on an Ubuntu server?
   
• How to create VM using the qcow2 image file in KVM
  I have image.qcow2 file. How do I install the qcow2 image provided in the qcow2 format? How do I create Linux KVM VM from provided image (say image.qcow2) file?
   
• How to add bash auto completion in Ubuntu Linux
  I set up a new Ubuntu Linux LXD container, but my auto-completion of bash shell commands are not working. How do I enable autocomplete feature in Ubuntu Linux 18.04 LTS?
   
• Ubuntu dig command not found – How to install dig on Ubuntu
  I deployed Ubuntu Linux minimal deployed in the cloud. However, I am unable to find the dig command on my newly created Ubuntu 18.04 LTS server running on Google cloud. It says ‘-bash: dig: command not found‘ I tried apt install dig command, but it failed. How do I install dig command on Ubuntu Linux using the command line over ssh?
   
• Ubuntu upgrade or update a single package using apt-get
  I am a new Ubuntu Linux server system administrator. I need to upgrade or update a single package using apt-get command or apt command. How do I update a specific package in Ubuntu Linux? How do I upgrade a single package using apt-get?
   
• Ubuntu 18.04 Setup SSH Public Key Authentication
  I am a new Ubuntu 18.04 LTS user and I would like to setup ssh public key authentication. How do I set up ssh keys based authentication on Ubuntu Linux 18.04 LTS server? How do I set up SSH keys on an Ubuntu Linux 18.04 LTS server? In Ubuntu 18.04 LTS, how do I set up public key authentication?