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Tutorial9: Regular Expressions

134 bytes removed, 13 March
INVESTIGATION 3: OTHER COMMANDS USING REGULAR EXPRESSIONS
# Scroll throughout the man pages for the ls command to view matches for the pattern "'''sort'''"<br>(You can press '''SPACE''' or key combination '''alt-b''' to move forward and backwards one screen respectively).<br><br>
# Press the letter <span style="color:blue;font-weight:bold;font-family:courier;">q</span> to '''exit''' the ''man'' pages for '''ls'''.<br><br>Let's use regular expressions with the '''less''' command.<br><br>
# Issue the following Linux command to download another data file called '''large-file.txt''':<br><span style="color:blue;font-weight:bold;font-family:courier;">wget <nowiki>https://ict.senecacollege.ca/~murray.saul/uli101/large-file.txt</nowiki></span><br><br># View the contents of the '''large-file.txt''' file using the '''more''' command and quickly view the contents of this file.<br><br>[[Image:other-re-2.png|thumb|right|300px|Entering '''/uli101''' in the '''less''' command can display all matches of "'''uli101'''" throughout the text file.]]
# Issue the following Linux command to view the contents of the '''large-file.txt''':<br><span style="color:blue;font-weight:bold;font-family:courier;">less large-file.txt</span><br><br>
#We want to search for a pattern '''uli101''' within this text file.<br>Type the following regular expression and press ENTER:<br><span style="color:blue;font-weight:bold;font-family:courier;">/uli101</span><br><br>You should see the pattern "uli101" throughout the text file.<br><br>
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