ls - list files
cd - change directory
chown - change ownership
chgrp - change group ownership
chmod - changing file permissions

mkdir - create a new directory
 - # mkdir newdir
   Creates a new directory called "newdir"

rmdir - remove a directory ( empty directories only )
 - # rmdir newdir
   Removes the *empty* directory "newdir"

rm - Remove file(s) and directories
 - # rm afile
   Removes the file named "afile"
 - # rm -R directory
   Recursively removes the directory "directory"
   - Meaning it goes through all of the subdirectories, and their subdirectories, 
     and so on, to clear out the entire tree.
   - A good option for this command, is the "-f" flag - meaning "force" remove.
   ( rm -Rf dir )  -- be careful with this command - *especially as root*

mv - Moves files ( renames )
 - # mv src dst
   The file named "src" is now known as "dst" ( sort of like cp + rm )
 - Note: This is how you rename files under linux

cp - Copy files
 - # cp fileA fileB
   "fileB" now contains a copy of everything in "fileA"
 - # cp logs/* /archive/logs
   ( assuming logs is a subdirectory of archive )

touch - Touches a file, updating it's modification time ( or creates a new file )
 - # touch somefile
   "somefile" will be created, if it did not already exist.
   The modification time on "somefile" will be updated to this second, if it did exist.
   # touch t[123] n4 z5 n5 cat

find - Finds files on the filesystem, by name, size, attributes, owners, etc
 - # find / -name mylostfile
 - # find / -name '*file' <- notice it's enclosed in single quotes - that's to keep the shell
     from substituting the "*" symbol