issue #51 - thanks @kmmon

Author: livialima

docs/16.md

@@ -6,6 +6,12 @@
 
 As a system administrator, you need to be able to confidently work with compressed “archives” of files. In particular two of your key responsibilities; installing new software, and managing backups, often require this.
 
+## YOUR TASKS TODAY
+
+* Create a tarball
+* Create a compressed tarball and compare sizes
+* Extract files from a tarball
+
 ## CREATING ARCHIVES
 
 On other operating systems, applications like WinZip, and pkzip before it, have long been used to gather a series of files and folders into one compressed file - with a .zip extension. Linux takes a slightly different approach, with the "gathering" of files and folders done in one step, and the compression in another.
@@ -16,8 +22,8 @@ So, you could create a "snapshot" of the current files in your _/etc/init.d_ fol
 
 This creates _myinits.tar_ in your current directory.
 
-Note 1: The `-v` switch  (verbose) is included to give some feedback - traditionally many utilities provide no feedback unless they fail.
-Note 2: The `-f` switch specifies that _“the output should go to the filename which follows”_ - so in this case the order of the switches is important.
+Note 1: The `-f` switch specifies that _“the output should go to the filename which follows”_ - so in this case the order of the switches is important. **VERY IMPORTANT**: `tar` considers anything after `-f` as the name of the archive that needs to be created. So, we should always use `-f` as the last flag while creating an archive.
+Note 2: The `-v` switch (verbose) is included to give some feedback - traditionally many utilities provide no feedback unless they fail.
 
 (The cryptic “tar” name? - originally short for "tape archive")