parallel

all

Run commands on multiple CPU cores. See also: `xargs`.

Subcommands (1)

Check the syntax of PHP files in parallel.

-j, --jobsboolean

Read arguments from `stdin`, run 4 jobs at once

Example: ls *.txt | parallel {{[-j|--jobs]}} 4 gzip

-S, --sshloginboolean

Run on multiple machines via SSH

Example: parallel {{[-S|--sshlogin]}} {{machine1}},{{machine2}} {{command}} ::: {{arg1}} {{arg2}}

boolean

Download 4 files simultaneously from a text file containing links showing progress

Example: parallel {{[-j|--jobs]}} 4 --bar --eta curl {{[-sO|--silent --remote-name]}} {} :::: {{path/to/links.txt}}

-t, --verboseboolean

Print the jobs which `parallel` is running in `stderr`

Example: parallel {{[-t|--verbose]}} {{command}} ::: {{args}}

Gzip several files at once, using all cores

parallel gzip ::: path/to/file1 path/to/file2 ...

Read arguments from `stdin`, run 4 jobs at once

ls *.txt | parallel [-j|--jobs] 4 gzip

Convert JPEG images to PNG using replacement strings

parallel convert {} {.}.png ::: *.jpg

Parallel xargs, cram as many args as possible onto one command

args | parallel -X command

Break `stdin` into ~1M blocks, feed each block to `stdin` of new command

cat big_file.txt | parallel --pipe --block 1M command

Run on multiple machines via SSH

parallel [-S|--sshlogin] machine1,machine2 command ::: arg1 arg2

Download 4 files simultaneously from a text file containing links showing progress

parallel [-j|--jobs] 4 --bar --eta curl [-sO|--silent --remote-name] {} :::: path/to/links.txt

Print the jobs which `parallel` is running in `stderr`

parallel [-t|--verbose] command ::: args