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Related Articles:

• Display current directory –

  pwd - "Print Working Directory"

• Interpret directory permission output –

  1|123|123|123|
  t|-u-|-g-|-o-|
  
  t: type
    d for directory or - for file
  u: user
    r for read or - for no read
    w for write or - for no write
    x for execute or - for no execute
  g: group
    r, w, x - same as above
  o: other
    r, w, x - same as above

• Modify Permissions –

  chmod [U[G[O]]]
  
  r = 4
  w = 2
  x = 1