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→INVESTIGATION 1: LINKING FILES
# Save your editing session and exit your text editor.<br><br>
# Issue the following Linux command:<br><span style="color:blue;font-weight:bold;font-family:courier;">ls -li ~/links/data-file.txt</span><br><br>View the '''i-node''' number for this file. What does this ''i-node'' number represent?<br><br>We will now create a '''hard link''' file and demonstrate how creating hard links are useful for '''back-ups'''.<br><br>
# Issue the following Linux command to create the following '''hard link''' in the same directory: <br><span style="color:blue;font-weight:bold;font-family:courier;">ln ~/links/data-file.txt ~/links/data-file.hard.lnk</span><br><br>[[Image:hard-link-inode1.png|thumb|right|450px|The '''i-node number''' is like a '''finger-print''', and is considered to be '''unique''' for each file on the Unix / Linux file system.]]
# Issue the following Linux command to display ''i-node'' ID numbers for <u>both</u> files:<br><span style="color:blue;font-weight:bold;font-family:courier;">ls -li ~/links/data-file.txt ~/links/data-file.hard.lnk</span><br><br>What do you notice about both of those file's ''i-node'' numbers?<br><br>
# Use a text editor to edit <span style="font-weight:bold;font-family:courier;">~/links/data-file.txt</span><br>and add some lines to the bottom of that file.<br><br>