#xargs

3 one-liners with this tag.

Check the status code of all sitemap.xml URLs in parallel

$curl -s https://example.com/sitemap.xml | grep -oP '(?<=<loc>)[^<]+' | xargs -P 8 -I{} curl -o /dev/null -s -w '%{http_code} %{url_effective}\n' {} | grep -v '^200 ' | sort

harmlessSEO checks

Collect all URLs from a sitemap index

$curl -s https://example.com/sitemap_index.xml | grep -oP '(?<=<loc>)[^<]+' | xargs -n1 curl -s | grep -oP '(?<=<loc>)[^<]+' | sort -u

harmlessSEO checks

Run a WP-CLI command on every site in a multisite

$wp site list --field=url --path=/var/www/vhosts/example.com/httpdocs | xargs -r -I {} wp cache flush --url={} --path=/var/www/vhosts/example.com/httpdocs