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→INVESTIGATION 1: BASICS OF REDIRECTION
# Press <span style="color:blue;font-weight:bold;font-family:courier;">ctrl-d</span> to exit the command.<br><br>
# Issue the '''cat''' command to view the contents of the file: '''output3.txt'''<br><br>
# Issue the following Linux command: <span style="color:blue;font-weight:bold;font-family:courier;">cp ~murray.saul/uli101/cars .</span><br><br>
# Issue the '''cat''' command to view the contents of the '''cars''' file.<br><br>
# Issue the following Linux command: <span style="color:blue;font-weight:bold;font-family:courier;">cut -c1-10 cars</span><br><br>What did this command do?<br><br>
# Issue the following Linux pipeline command: <span style="color:blue;font-weight:bold;font-family:courier;">ls /bin/?? | sort -r</span><br><br>You should notice that the output from this pipeline command is the same output<br>from the command you issued in '''step #6'''<br><br>
# Issue the following Linux pipeline command: <span style="color:blue;font-weight:bold;font-family:courier;">ls /bin/?? | sort -r | more</span><br><br>What is different with this pipeline command as opposed to the previous pipeline command?<br><br>
# Issue the '''ls''' command.<br><br>You should notice that no files have been created. Let's get practice issuing more pipeline commands <br>using commands (previously learned or new) to be used as filters.<br><br>
# Issue the following Linux pipeline command: <span style="color:blue;font-weight:bold;font-family:courier;">ls /bin/?? | sort -r | head -5</span><br><br>What did you notice?<br><br>
# Issue the following Linux pipeline command: <span style="color:blue;font-weight:bold;font-family:courier;">ls /bin/???? | sort -r | grep r | tail -2</span><br><br>What did you notice?<br><br>
# Issue the following Linux pipeline command: <span style="color:blue;font-weight:bold;font-family:courier;">ls /bin/???? | sort -r | grep r | cut -1c1-3</span><br><br># Issue the following Linux pipeline command: <br><span style="color:blue;font-weight:bold;font-family:courier;">ls /bin/???? | tee unsorted.txt | sort -r | tee sorted.txt | tee unmatched.txt | grep r | tail -2</span><br><br>What did you notice?<br><br>
# Check the files that were created to see how the '''tee''' command was used in the previous pipeline command.<br><br>
# Change to your home directory.<br><br>
# Issue the following Linux '''rm''' command to remove the ~/redirect directory and its contents: <span style="color:blue;font-weight:bold;font-family:courier;"u>rm -r ~/redirectonly</spanu>remove the files '''unsorted.txt''' , '''sorted.txt''' , and '''unmatched.txt'''<br><br>
:In the next investigation, you will learn various techniques to issue multiple Linux commands on the same line, or long Linux commands over multiple lines.
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=INVESTIGATION 3: ISSUING MULTIPLE UNIX/LINUX COMMANDS=
