RHCSA Lab 1.2 — I/O Redirection

Simulated environment — commands are limited to lab objectives.

📋 Lab Info

Lab Objective

Master I/O redirection in Linux. You will redirect standard output to files, feed files as input to commands, pipe command output into other commands, and redirect error streams separately.

Time Estimate: 10–15 minutes

0% Complete

Requirements

☐ Output redirection: echo "Hello RHCSA" > hello.txt then cat hello.txt

☐ Input redirection: wc -l < hello.txt or wc -l hello.txt

☐ Pipe commands: cat hello.txt | grep "RHCSA"

☐ Error redirection: ls /nonexistent 2> error.log then cat error.log

🎉 Lab Completed!

All I/O redirection requirements met.

📝 Steps

Click any step to jump to it (resets partial progress for that step).

0IntroductionCompleted

Welcome to RHCSA Lab 1.2. You'll work through four I/O redirection techniques. Open 💡 Explain at any time to understand what's happening under the hood.

1Output Redirection (`>`)Current Step

Redirect command output into a file instead of the screen, then verify it.

Run:

echo "Hello RHCSA" > hello.txt

Then verify:

cat hello.txt

2Input Redirection (`<`)Pending

Feed a file as input to a command using <.

Run either:

wc -l < hello.txt

wc -l hello.txt

3Pipes (`|`)Pending

Connect two commands so the output of one becomes the input of the next.

Run:

cat hello.txt | grep "RHCSA"

4Error Redirection (`2>`)Pending

Redirect error output (stderr) to a file separately from normal output.

Run:

ls /nonexistent 2> error.log

Then check the log:

cat error.log

💡 Explain

RHCSA Lab 1.2 — I/O Redirection ────────────────────────────────── 📝 Steps — what to do | 💡 Explain — why it works | 📋 Lab Info — your progress Tab completes filenames. ↑/↓ navigates history.

[user@lab ~]$