Files and Folders Lecture

• Some kinds of data-
  

  Text

  Numerical data

  Images (photos, diagrams,...)

  Sound (voice, music,...)

• File types - some examples:

  initial_handout.doc	a Word document
  sample_spreadsheet.xls	an Excel file
  santa.gif †	a gif (Graphics Interchange Format) file
  NZ_by_air.jpg †	a jpeg (Joint Photographic Experts Group) file
  badday.mpg †	an mpg (Moving Pictures Experts Group) file
  sample2001.ps †	a ps (PostScript) file (read in GhostView)
  sample2001.pdf †	a pdf (Portable Document Format) file (read in Acrobat Reader)
  311NumTh.dvi ‡	a dvi (Device Independent) file
  web_page.html	an HTML (HyperText Markup Language) file (read in any Web Browser)

  ^†Courtesy Lex Weaver, Department of Computer Science, FEIT, ANU
  ^‡Courtesy David Wilkins, School of Mathematics, Trinity College, Dublin
• Folders (directories)

  Choosing a folder/file heirarchy for your data

  Naming files and folders - avoiding blanks and upper-case letters; using the underscore   'Good' names: comp1900_folder,  assignment_one.doc   'Bad' names: COMP1900Folder,  Assignment One.doc

  Paths  (Example: cs/pub/student/comp1900/lectures/files_folders.shtml )

  Updating files; keeping previous versions

  Backing up files using email to store copies of them off-site

  Using aliases to enhance access to a file or folder