Linux/Basic commands/parallel

< Linux < Basic commands

parallel[1] allows the user to execute shell scripts or commands in parallel.

Activities

Basic

  1. Execute a command in parallel by ssh in MACHINE1 and MACHINE2 using parallel
  2. Read stackexchange questions about gnu-parallel: https://unix.stackexchange.com/questions/tagged/gnu-parallel?tab=votes&pagesize=50
  3. Install parallel in macOS: brew install parallel can conflict with brew install moreutils

Intermediate

  1. Review different parallel options such as: --keep-order or -k which keep order in the output. Do not affect order of execution.
  2. Update all your git repositories in a directory in macOS using parallel: ls | parallel git -C {} fetch

See also

  • xargs
  • moreutils package
  1. ↑ https://www.gnu.org/software/parallel/man.html
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