Using Input/Output Redirection and Analyzing Text on RHEL 8

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Using Input/Output Redirection and Analyzing Text on RHEL 8

A Linux system administrator's life is filled with text files and data. It's easier to make sense of this mountain of data using the `grep` utility combined with the power of regular expressions. Input/output redirection is also an important skill for Linux system administrators, who can use it to create log files, quiet error messages, manipulate and sort data, and more. In this hands-on lab, we will explore input/output redirection as well as use `grep` and regular expressions to analyze and manipulate text. *This course is not approved or sponsored by Red Hat.*

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Lab Info

Level

Beginner

Last updated

Sep 20, 2025

Duration

30m

Challenge

Use Input/Output Redirection
1. Generate a server informational custom log file and append to it.
2. Generate a log file of a user's owned file in a directory structure, excluding errors.
3. Number the log file for reference, and sort it with various options.
4. Generate a list of the top-level directories under /etc with space usage, and then sort the list from smallest to largest space usage.
Challenge

Use Grep and Regular Expressions to Analyze Text
1. Use the find command and options to search file contents with grep.
2. Produce a list of files that contain a particular string.
3. Decide if the style of output does not suit your purposes, and use grep to find the information, including adding options or commands to get the right result.

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