tldr/pages/common/xargs.md

xargs

Execute a command with piped arguments coming from another command, a file, etc. The input is treated as a single block of text and split into separate pieces on spaces, tabs, newlines and end-of-file. More information: https://pubs.opengroup.org/onlinepubs/9699919799/utilities/xargs.html.

• Run a command using the input data as arguments:

{{arguments_source}} | xargs {{command}}

• Run multiple chained commands on the input data:

{{arguments_source}} | xargs sh -c "{{command1}} && {{command2}} | {{command3}}"

• Gzip all files with .log extension taking advantage of multiple threads (-print0 uses a null character to split file names, and -0 uses it as delimiter):

find . -name '*.log' -print0 | xargs {{[-0|--null]}} {{[-P|--max-procs]}} {{4}} {{[-n|--max-args]}} 1 gzip

• Execute the command once per argument:

{{arguments_source}} | xargs {{-n|--max-args}} 1 {{command}}

• Execute the command once for each input line, replacing any occurrences of the placeholder (here marked as _) with the input line:

{{arguments_source}} | xargs -I _ {{command}} _ {{optional_extra_arguments}}

• Parallel runs of up to max-procs processes at a time; the default is 1. If max-procs is 0, xargs will run as many processes as possible at a time:

{{arguments_source}} | xargs {{[-P|--max-procs]}} {{max-procs}} {{command}}