Category Archives: Networking

Useful Linux and UNIX Commands

  • chmod —- change files or directory permissions
  • chown —- change ownership
  • cd —- change directory
  • cp —- copying files
  • du —- shows the disk uses
  • df —- shows the disk free
  • dos2unix —-convert file format
  • ftp —-for connect to a remote machine
  • grep —- search files
  • head —- display first part of the file
  • kill —- kill(end) the process
  • ls —- list files

Seven Layers of The OSI Model

The Seven (7) Layers of The Open System Interconnection (OSI)  Model.

  • Application (Layer #7)
  • Presentation (Layer #6)
  • Session (Layer # 5)
  • Transport (Layer #4)
  • Network (Layer #3)
  • Data Link (Layer #2)
  • Physical (Layer #1)