The example how can answers look like

Please keep in mind, it is just how they can look, it is not right answers (but may be :) )

Language?

EN

Number of parameters

  1. 4
  2. 4
  3. 3
  4. 1
  5. 1

Coreutils

  1. ls - Short for less
  2. cd - Show all CD-ROM devices
  3. cp - I don't know
  4. mv - movie player

Redirection

  1. cmd -> /tmp/a.tmp
  2. cmd <- FOO

Brace expansion

abc aec a1c a2c

Pipeline

Bash will concatenate outputs from all commands in pipeline into one long output. It will begins with output of foo and ends with output of baz