mirror of https://github.com/CrimsonTome/tldr.git
29 lines
744 B
Markdown
29 lines
744 B
Markdown
# parallel
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> Run commands on multiple CPU cores.
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> More information: <https://www.gnu.org/software/parallel>.
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- Gzip several files at once, using all cores:
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`parallel gzip ::: {{file1}} {{file2}} {{file3}}`
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- Read arguments from stdin, run 4 jobs at once:
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`ls *.txt | parallel -j4 gzip`
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- Convert JPG images to PNG using replacement strings:
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`parallel convert {} {.}.png ::: *.jpg`
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- Parallel xargs, cram as many args as possible onto one command:
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`{{args}} | parallel -X {{command}}`
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- Break stdin into ~1M blocks, feed each block to stdin of new command:
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`cat {{big_file.txt}} | parallel --pipe --block 1M {{command}}`
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- Run on multiple machines via SSH:
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`parallel -S {{machine1}},{{machine2}} {{command}} ::: {{arg1}} {{arg2}}`
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