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Linux Server Managment
The yum command line tool is used to install and update software packages under RHEL / CentOS Linux server. I know how to apply updates using yum update command line, but I would like to use cron to update packages where appropriate manually. How do I configure yum to install software patches/updates automatically with cron?You…
How do I add a user to the Apache group called www-data under Ubuntu or Debian Linux server operating systems using the command line option?You need to use the useradd command to add a user to the group called www-data under Ubuntu or Debian Linux system. This page shows how to add a user to…
How do I install the extra repositories such as Fedora EPEL repo on an Red Hat Enterprise Linux server version 8.x?Introduction – You can easily install various packages by configuring an RHEL 8.x system to use Fedora EPEL repos and third party packages. Please note that these packages are not officially supported by Red Hat,…
I am a new Ubuntu Linux user. How do I install Ansible on a Ubuntu Linux 16.04/18.04 LTS or 17.10/18.10 desktop control machine?Introduction: Ansible is a simple and easy to use IT automation tool. One can use Ansible to deploy applications and systems/VM/containers. Ansible configuration is written in plain English and works on the remote/local…
I am a new Linux system user. How do I determine if my CPU is 64bit or not on a Linux operating systems using command line option? How can I check Linux kernel is in 32 bit or 64 bit mode?You need to use the following commands to find out information about Linux kernel and…
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?Introduction: Bash is an sh-compatible command language interpreter that executes…
How do I list all installed kernel on Linux operating system? How do I find out current kernel version?You can use standard package listing command to list installed Linux kernels on your Linux operating systems. This page shows how to list kernel using the command line. List or Check Installed Linux Kernels The command varies…
I have HP Officejet Pro printer and scanner. How do I install HP Officejet Pro network printers and scanners on Ubuntu Linux? How can I install HP printer on Ubuntu Linux?Introduction – You need to install HPLIP (HP Linux Imaging and Printing) software. It is official software that supports a wild range of HP printers…
How do I determine if a port is in use under Linux or Unix-like system? How can I verify which ports are listening on Linux server? How do I check if port is in use on Linux operating system using the CLI?It is important you verify which ports are listening on the server’s network interfaces….
SSH Key Tutorial Log into SSH mkdir $HOME/.ssh chmod -R og= $HOME/.ssh cd .ssh nano authorized_keys2 Add your key you created with PuttyGen , make absolutely sure your key is in one line ONLY , otherwise it wont work! Read moreKaboxer – Kali Applications Boxer | Kali Linux BlogAdjust your sshd_config nano /etc/ssh/sshd_config to Read…
How do I check CPU temperature in Ubuntu Linux using a command line and GUI tools on my Thinkpad laptop or Desktop computer?One of the most common complaints is the overheating laptop, especially older models. Laptop components are tightly put together to each other. So there is very little room for air movement in thinner…
How can I install Nginx web server On CentOS Linux 6 or Red Hat Enterprise Linux 6 using the yum command? nginx is a free and open-source high-performance web server. This page shows how to install Nginx on a CentOS 6 or RHEL 6 using yum command. Recently, nginx web project started to distribute binary…
I like htop output, but it is not installed by default on my Ubuntu cloud server. How do I install htop on Ubuntu Linux 18.04 LTS server?Htop is a free and open source ncurses-based process viewer for Linux. It is released under GPL license. htop is similar to top command on Linux but allows you…
I am a new Linux and Unix-like system command line user. How do I find and locate the binary, source, and manual page files for a given command?You need to use the whereiscommand to find the source, binary, and manuals sections for specified commands or files. A binary is nothing but an executable from of…
How do I install Ansible on Ubuntu 18.04 workstation? How can I set up and test Ansible playbooks using my Ubuntu Linux desktop?Ansible is an open source and free configuration management IT tool. It is similar to Chef or Puppet. It works over SSH-based session and does not need any software or client agent on…
I am a new Ubuntu Linux user. I switched from Apple MacOS/Macbook and I am trying to run the curl command from a shell script but getting the following error:bash: curl: command not foundHow do I fix this on an Ubuntu Linux version 17.10/19.04/16.04/18.04 LTS?curl command is a tool to download or transfer files/data from…
There is an excellent little utility to monitor hard drive temperature. Most modern computer hard disk including SSD comes with S.M.A.R.T (Self-Monitoring, Analysis, and Reporting Technology). It is a monitoring system for computer hard disks to detect and report on various indicators of reliability, in the hope of anticipating failures. Monitor Hard Disks Temperature With…
I recently switched from a Windows server 2016 to a FreeBSD Unix server. I need to check disk space on Unix command line. How do I find out disk space utilization information using the Unix command-line option?Unix family of operating systems offer the following commands to check disk space usage as per your needs. Check…
How do I install snapd on Fedora Linux to run and manage snaps?Snaps are nothing but Linux software packages in containers format. They are simple to create and easy to install on Fedora Linux. Many of my favorite open source and closed source software distributed in snaps format. As compared to regular package rpm packages,…
I compiled custom FreeBSD kernel for my FreeBSD jail to use vnet. How do I update my FreeBSD /usr/src/ code tree? How can I update source tree at /usr/src on FreeBSD using svn command to patch and compile kernel again?Introduction: Subversion is a software versioning and revision control system distributed as open source under the…