Category: Unix Automation and Security


Bash Scripting – Using Variables

Just running individual commands from the shell script is useful, but this has its limitations. Often, you’ll want to incorporate other data in your shell commands to process information. You can do this by using variables. Variables allow you to temporarily store information within the shell...


Part 1 – Mastering GREP – Introduction and Invoking

Introduction to Grep `grep’ searches input files for lines containing a match to a given pattern list. When it finds a match in a line, it copies the line to standard output (by default), or produces whatever other sort of output you have requested with options....


Part 1 – Mastering Sed – Introduction , Invocation and Programs

1 Introduction `sed’ is a stream editor. A stream editor is used to perform basic text transformations on an input stream (a file or input from a pipeline). While in some ways similar to an editor which permits scripted edits (such as `ed’), `sed’ works by making only...

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