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Table of Contents
Intermediate Unix Commands
Permissions
UNIX organizes permissions by user, group, and others. There are three different permissions available: read, write, and execute
chmod is the command to change permissions
Groups
To change the group associated with a file, use chgrp
Finding Content: grep
Gnu Regular Expression Print (grep) is a helpful tool to search for text within files, using–you guessed it–regular expressions! Regular expressions can be quite simple.
Example: I want to find all the names that start with “Sara” in a file of names
grep Sara names.txt
Finding Files: find
Finding Differences Between Files: diff
Beginning of Files: head
End of Files: tail
Viewing Services Listening on a Port
lsof -i :<port>
e.g.,
lsof -i :8080
