Command Line Interface

History IBM ◦ 8086 processor What did they do? ◦ Outsourced to a small company

Bill Gates Purchased an OS ◦ QDOS (Quick and dirty operating system) Fixed it ◦ MS-DOS = Microsoft Disk Operating System

MS-DOS Operating system using MS DOS ◦ MS DOS 1.1 – Windows 7 Vista & Windows 7 ◦ PowerShell

Command line Why do we still use command line? ◦ Major configuration ◦ OS compatibility ◦ You can configure faster ◦ Remote trouble shooting takes less bandwidth

DOS How does DOS work? ◦ It works like a conversation. ◦ Example:  Computer: Want to watch a movie?  User: A good one How do you access CMD?

DOS VS GUI

Filename limitations Old standard (true dos) ◦ Only 8 character long New Standard ◦ 255 character limitation ◦ Using LFN= Long file name Vista -Windows 7 ◦ 260 Character limitation

Illegal characters in a file name What is an illegal character? ◦ * " / \ | [ ] : ; =, Why do we have illegal characters? ◦ Programming ◦ File path name (C:\Users\Administrator\AppData\)

File Extensions What is a file extension? ◦ Examples: .BAT.HTML.doc. docx.ppt.pptx What does it do? ◦ Let’s you identify the file with a program in windows

File extension limitations Old standard (true dos) ◦ 3 characters New standard ◦ Same as file name limitations but…

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