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AWK and Regular Expressions to Filter Text or String in Files

AWK is an interpreted programming language. It is very powerful and specially designed for text processing. AWK – Basic Examples This chapter describes several useful AWK commands and their appropriate examples. Consider a text file marks.txt to be processed with the following content − 1) Amit Physics 80 2) Rahul Maths 90 3) Shyam Biology […]

Getting Started with Git: 25 Essential Commands for Beginners

Git is a powerful version control system that every developer should know. Whether you’re collaborating with others or managing your own projects, these 25 Git commands will help you navigate and control your codebase efficiently. 1. git init Initializes a new Git repository in your project directory. git init 2. git clone Clones an existing […]

Send SNMP Traps from Nagios to Remote Management Host

1. Add ‘send snmp trap’ command to nagios vim /usr/local/nagios/etc/objects/commands.cfg define command{ command_name send_snmptrap command_line /usr/bin/snmptrap -v 2c -c public 10.50.24.34 ” NAGIOS-NOTIFY-MIB::nSvcEvent nSvcHostname s “$HOSTNAME$” nSvcDesc s “$SERVICEDESC$” nSvcStateID i $SERVICESTATEID$ nSvcOutput s “$SERVICEOUTPUT$” } 2. Add this event and enable the event to services which needed to send traps vim /usr/local/nagios/etc/objects/localhost.cfg define service{ […]