Stefan Röttger

All commands and operations relate to the files in the current working directory (cwd). By changing the current working directory we navigate through the file tree structure:

• pwd: print working dir
• cd <path>: change working dir relative to the cwd
• ls: list working directory

Paths:

• The . is equivalent to the cwd.
• The .. is equivalent to the directory level above the cwd.
  • cd ..: move up one level in the directory structure.
• the / is the root of the file system.
• without a leading slash all paths and files are treated to be relative to the cwd.
• with a leading slash the file path is specified absolute referring to the root / of the file system.
• the home directory of a user (where he has read and write permissions) is denoted by ~ (or $HOME).

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