Files and Directories

• Access to files and directories
  • Displaying permissions - the file mode
  • Changing permissions with chmod
  • Setting default permissions with umask
• Changing to another directory
• Comparing
  • files and directories using diff
  • files visually, using sdiff
  • files under SCCS control, using sccsdiff
• Copying files and directories
• Creating files and directories
• Defining files with wildcard characters
• Deleting files and directories
• Determining file type
• Displaying files
  • using cat
  • using more
  • the first lines using head
  • the last lines using tail
• Displaying the path to the current directory
• Finding files and directories
• Linking files and directories
• Listing the files in a directory
• Renaming (moving) files and directories
• Searching the contents of a file
• Sorting the contents of a file
• Transferring files
  • using ftp
  • using sftp or scp