Merge pull request #132 from amitsaha/lsof_enhancements

Enhancements to 'lsof' cheatsheet.

cheatsheets/lsof

@@ -1,8 +1,23 @@
-# List all ipv4 network files
+# List all IPv4 network files
 sudo lsof -i4
 
+# List all IPv6 network files
+sudo lsof -i6
+
 # To find listening ports:
 lsof -Pnl +M -i4
 
 # To find which program is using the port 80:
 lsof -i TCP:80
+
+# List all processes accessing a particular file/directory
+lsof </path/to/file>
+
+# List all files open for a particular user
+lsof -u <username>
+
+# List all files/network connections a given process is using
+lsof -c <command-name>
+
+# See this primer: http://www.danielmiessler.com/study/lsof/
+# for a number of other useful lsof tips