Linux Commands/ScriptsCategory

Things to know about Firewall cmd Date : 22-Oct-2018 firewall-cmd – Firewall Command Line Client tool. This is part of the firewalld application,which is installed by default. Introduction:  Firewall-cmd is the command line client of the firewalld daemon (firewall management tool for Linux OS). It provides interface to manage… Continue Reading Things to know about Firewall cmd

How to Backup OpenVZ containers (VM’s) using vzdump on Centos / RHEL Date Posted : 10-10-2018 OpenVZ is a linux based Kernel virtualization technology developed by SWSoft for its commercial product Virtuozzo.In this article we are going to learn about how to backup VM’s which are running under Hardware node.… Continue Reading How to Backup OpenVZ containers (VM’s) using vzdump on Centos / RHEL

Nagios Remote Host Monitoring Dated on :05/10/2018 On Remote Host Step 1: Install the compiler gcc,glibc yum install -y gcc glibc glibc-common gd gd-devel make net-snmp openssl-devel Step 2: Add the user for the nagios using useradd nagios Note: If already exist skip this. Step 3: Add the password for… Continue Reading Nagios Remote Host Monitoring

How to Install Let’s Encrypt SSL Date posted: 28-sep-2018 Please follow  this steps to install the SSL certificate. Step 1: Install CertBot Type the given commands sudo apt-get install software-properties-common python-software-properties sudo add-apt-repository ppa:certbot/certbot sudo apt-get update sudo apt-get install python-certbot-apache   Step 2: Install Let’s Encrypt SSL Install Let’s Encrypt… Continue Reading How to Install Let’s Encrypt SSL

How to Install Latest Version of ngnix (1.15.4) on Centos 7 Dated : 29-09-2018 Nginx is a flat,light weight,powerful HTTP web server. In this piece of writing, we will illustrate about ngnix web server latest version installation on centos 7 and How to allow traffic for HTTP services,because by default the… Continue Reading How to Install Latest Version of ngnix (1.15.4) on Centos 7

Scenario 1: I had setup SSH key with a passphrase  to access all my servers/machines. However, its annoying(also non-productive) to enter passpharse every time I want to ssh into another machine. Scenario 2: I want clone a git repo into another machine other from my laptop. However, that git repo… Continue Reading How to use SSH Key with passpharse for SSH forwarding

Introduction Red Hat Enterprise Linux (RHEL) 6 and RHEL 7 have several differences in system administration commands and configuration files. One of the major changes introduced in RHEL 7 was the adoption of systemd as the system and service manager, replacing the traditional SysV init system used in RHEL 6.… Continue Reading Redhat 6 vs Redhat 7 distribution Commands

Introduction When working with configuration files, scripts, log files, or text documents, you may encounter unwanted leading spaces before specific words. These extra spaces can affect formatting, cause parsing issues, or result in errors in scripts and configuration files. Linux provides several command-line utilities, such as sed, awk, and perl,… Continue Reading How to Remove a space in front of a word in a file