Update cheatsheets

linux/pihole

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# pihole
+
+> Terminal interface for the Pi-hole ad-blocking DNS server.
+> More information: <https://docs.pi-hole.net/core/pihole-command/>.
+
+- Check the Pi-hole daemon's status:
+
+`pihole status`
+
+- Update Pi-hole and Gravity:
+
+`pihole -up`
+
+- Monitor detailed system status:
+
+`pihole chronometer`
+
+- Start or stop the daemon:
+
+`pihole {{enable|disable}}`
+
+- Restart the daemon (not the server itself):
+
+`pihole restartdns`
+
+- Whitelist or blacklist a domain:
+
+`pihole {{whitelist|blacklist}} {{example.com}}`
+
+- Search the lists for a domain:
+
+`pihole query {{example.com}}`
+
+- Open a real-time log of connections:
+
+`pihole tail`