How do you use the xargs command?

xargs builds and executes commands from standard input. It takes lines or items from stdin and passes them as arguments to a command. Basic: find . -name "*.tmp" | xargs rm — deletes all .tmp files. -I {} specifies a placeholder: find . -name "*.jpg" | xargs -I {} cp {} /backup/. -P 4 runs up to 4 processes in parallel. -n 1 passes one argument per command invocation. -0 uses null byte as delimiter (pairs with find -print0) for safe handling of filenames with spaces: find . -name "*.log" -print0 | xargs -0 rm. Without -0, filenames with spaces will be split incorrectly.