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Tutorial2: Unix / Linux File Management

72 bytes removed, 14:19, 23 September 2020
Part 3: Manage / Manipulate Text File Content
'''Perform the Following Steps:'''
# View Refer to the following table of Text File Management commands Your instructor should have demonstrated in class how to use these commands):<br><br><table cellpadding="5"><tr><th style="border-bottom: 1px solid black;" width="20%">Linux Command</th><th style="border-bottom: 1px solid black;">Purpose</th></tr><tr><td>'''touch'''</td><td>Create empty file(s) / Updates Existing File's Date/Time Stamp</td></tr><tr><td>'''cat'''</td><td>Display text file's contents without editing (small files)</td></tr><tr><td>'''more , less'''</td><td>Display / Navigate within large text files without editing</td></tr><tr><td>'''cp'''</td><td>Copy text file(s)</td></tr><tr><td>'''mv'''</td><td>Move / Rename text files</td></tr><tr><td>'''rm'''</td><td>Remove text file(s)</td></tr><tr valign="top"><td>'''sort'''</td><td>Sorts (rearranges) order of file contents when displayed. Content is sorted alphabetically by default. The '''-n'''''Italic text'' option sorts numerically, '''-r''' performs a reverse sort</td></tr><tr valign="top"><td>'''head''' , '''tail'''</td><td>Displays the first / last 10 lines of a text file by default. An option using a value will display the number of lines (e.g. head -5 filename will display first 5 lines, tail -5 filename will display last 5 lines).</td></tr><tr valign="top"><td>'''grep'''</td><td>Displays file contents that match a pattern</td></tr><tr valign="top"><td>'''uniq'''</td><td>Displays identical consecutive lines only once</td></tr><tr valign="top"><td>'''diff''' file1 file2</td><td>Displays differences between 2 files</td></tr><tr><td>'''file'''</td><td>Gives info about the contents of the file (e.g. file with no extention)</td></tr><tr valign="top"><td>'''find'''</td><td>To find files matching specified characteristics:<table><tr valign="top"><td width="20%">'''find . -name "file*"'''</td><td>List pathname of any filenames beginning with "file",<br>from the current directory and any subdirectories</td></tr><tr valign="top"><td>'''find . -size +50k'''</td><td>List pathname of any files larger than 50 kb, from the current directory and any subdirectories</td></tr><tr valign="top"><td>'''find . -mmin -5''' </td><td>List files modified less than 5 minutes ago</td></tr><tr> valign="top"><td>'''find -P .'''</td><td>Lists file pathnames in the current directory</td></tr></table></td></tr></table><br><br>
# Confirm that you are located in your '''home''' directory.<br><br>
# Use the '''touch''' command to create the empty files called '''a.txt''', '''b.txt''', and '''c.txt'''<br><br>
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