Bash related stuff

14 Sep 2018 bash process substitution

Pipe and redirection

• Ref:
  • Pipe and stdin redirection to cat
• Piping

  $ echo "hello world" | cat
  

• Redirection

  $ cat < file.txt
  

• Process Substitution

  $ cat <(echo "hello world")
  

Subshell (COMMAND EXECUTION ENVIRONMENT)

• Ref:
  • Do parentheses really put the command in a subshell?

$ (command1; command2; command3) | command4