Category: Linux

Linux Server Managment

How To Find Out FreeBSD Version and Patch Level Number nixCraft Updated Tutorials/Posts

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?Introduction :

How To Find My Public IP Address From Command Line On a Linux nixCraft Updated Tutorials/Posts

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

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How to setup a UFW firewall on Ubuntu 18.04 LTS server nixCraft

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

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Regular Expressions In grep examples nixCraft Updated Tutorials/Posts

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?Linux comes with GNU

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Change Shell To Bash in Linux / Unix nixCraft Updated Tutorials/Posts

How do I switch from a ksh shell to bash on Linux or Unix system? How to change shells on Unix-like system?A shell is nothing but a command that provides a text-only user interface (also

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How to configure a static IP address on RHEL 8 nixCraft

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

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How do I find out what shell I am using on Linux/Unix? nixCraft Updated Tutorials/Posts

Both Linux and Unix provides various shell out of the box. One can find bash (Bourne Again shell), ksh (Korn shell), csh (C shell)/tcsh (TC shell), sh (Bourne shell) and more installed by default. However,

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Bash foreach loop examples for Linux / Unix nixCraft

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?The C shell (csh) or

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Bash check if process is running or not on Linux / Unix nixCraft

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?

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How to create VM using the qcow2 image file in KVM nixCraft

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?Introduction: qcow is nothing but a disk

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How to find a Word in Vim or vi text editor nixCraft Updated Tutorials/Posts

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?Introduction: Vi and vim is

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Raspberry $25 Pi 3 Model A+ Released – Complete specs and pricing nixCraft

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

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Red Hat / CentOS Check and List Running Services Linux Command nixCraft Updated Tutorials/Posts

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?There are various ways and tools

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How to install and configure Varnish cache on Ubuntu Linux 16.04 LTS nixCraft Updated Tutorials/Posts

How do I install Varnish Cache server to improve the performance of my existing Apache web server especially caching dynamic content on Ubuntu Linux 16.04 LTS server?Varnish Cache is a web application accelerator. You install

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