--- title: Guides — page 4 of 4 description: 62 Guides articles — Step-by-step guides to the free WatchFor tools: a real problem, a real run, how to read the result and what to do next. canonical: https://watchfor.io/blog/category/guides/page/4 --- [All posts](/blog) # Guides — page 4 Step-by-step guides to the free WatchFor tools: a real problem, a real run, how to read the result and what to do next. [All](/blog)[Monitoring](/blog/category/monitoring)[Networking](/blog/category/networking)[Performance](/blog/category/performance)[Security](/blog/category/security)[Reliability](/blog/category/reliability)[Email](/blog/category/email)[DevOps](/blog/category/devops)[Engineering](/blog/category/engineering)[Guides](/blog/category/guides) [All articles](/blog/all) 62 article s · page 4 of 4 [GuidesOct 04, 2026 ## Is my XML sitemap valid? How to validate it with the Sitemap Validator Search Console flags sitemap problems, or lists pages as excluded, and you need to know whether the sitemap itself is the cause. To validate an XML sitemap, confirm it parses, stays within the protocol limits and lists only URLs that return 200 and are meant to be indexed. Here's how with the free Sitemap Validator, what it means when it reports 10 URLs for a site with thousands of pages, and the commands that check the rest.WatchFor Team5 min read](/blog/how-to-validate-an-xml-sitemap)[GuidesOct 04, 2026 ## Every 15 minutes on weekdays? Write the crontab line with the Crontab Generator You need a job every 15 minutes during office hours, Monday to Friday. The crontab line is */15 9-17 * * 1-5, but that runs until 17:45, not 17:00, and at 09:00 in the server's timezone, which may not be yours. Here's how to write a crontab schedule with the free Crontab Generator, check every run before you paste it into crontab -e, and turn it into a complete, logged line.WatchFor Team6 min read](/blog/how-to-write-a-crontab-schedule) --- Canonical page: https://watchfor.io/blog/category/guides/page/4 · Site guide: https://watchfor.io/llms.txt