Learn to use a Unix system at the command-line along with a text editor and start writing BASH program.  The command-line provides exposure to the Unix philosophy, files/directories, options/arguments, variables (environment), I/O, meta-characters and documentation (via manpages).  First programs are written in BASH.  BASH supports structured programming (sequence, if, while, functions) and an introduction to data structures/algorithms via arrays.  After BASH I&#39;d move onto C (using Ritchie and Kernighan for the text) with extensive coverage of the STDC Library.  From this point there are numerous forks in the road.<br>
<br>The &quot;hello, world&quot; program writtin in BASH.<br><br>$ echo hello, world &lt;ENTER&gt;<br>