Related sites:

• unix.com

  The UNIX and Linux Forums - Free Tech Support

  

• ss64.com

  SS64 | Command line reference

  

• commandlinefu.com

  All commands

• commandwindows.com

  Windows Command Line Interpreter|Shell|DOS Prompt|Batch Files|Scripting

  

• s3tools.org

  Amazon S3 Tools: Command Line S3 Client and S3 Backup for Windows, Linux: s3cmd, s3express

  

• folkstalk.com

  Informatica, Oracle, Netezza, Unix, Hadoop Tutorials and Examples

  

• theunixschool.com

  The UNIX School