How does xargs -n work?

0112

The -n option in xargs specifies the maximum number of arguments to be passed to the command for each execution. This allows you to control how many items from the input are processed at once.

Example Usage

For instance, if you have a list of numbers and you want to process them in batches of two, you can use -n 2 like this:

echo {1..10} | xargs -n 2 echo "Processing batch:"

Output

This command will produce the following output:

Processing batch: 1 2
Processing batch: 3 4
Processing batch: 5 6
Processing batch: 7 8
Processing batch: 9 10

Explanation

  • Each execution of the echo command receives exactly 2 arguments (as specified by -n 2).
  • If the total number of items is not divisible by the number specified, the last command will receive the remaining items.

This feature is useful for managing resource usage and ensuring that commands do not receive too many arguments at once.

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