Update cheatsheets

tldr/squid

@@ -0,0 +1,37 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# squid
+
+> Cache and forward HTTP requests through a proxy server.
+> More information: <https://manned.org/squid>.
+
+- Start Squid in the background:
+
+`sudo squid`
+
+- Start Squid in the foreground:
+
+`sudo squid -N`
+
+- Start Squid with a specific configuration file:
+
+`sudo squid -f {{path/to/squid.conf}}`
+
+- Test the configuration file for errors:
+
+`sudo squid -k parse`
+
+- Reload the configuration file:
+
+`sudo squid -k reconfigure`
+
+- Shut down Squid gracefully:
+
+`sudo squid -k shutdown`
+
+- Rotate the log files:
+
+`sudo squid -k rotate`