Move pages under tldr, lint run.sh, update docs

tldr/linux/ip-link

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# ip link
+
+> Manage network interfaces.
+> More information: <https://man7.org/linux/man-pages/man8/ip-link.8.html>.
+
+- Show information about all network interfaces:
+
+`ip link`
+
+- Show information about a specific network interface:
+
+`ip link show {{ethN}}`
+
+- Bring a network interface up or down:
+
+`ip link set {{ethN}} {{up|down}}`
+
+- Give a meaningful name to a network interface:
+
+`ip link set {{ethN}} alias "{{LAN Interface}}"`
+
+- Change the MAC address of a network interface:
+
+`ip link set {{ethN}} address {{ff:ff:ff:ff:ff:ff}}`
+
+- Change the MTU size for a network interface to use jumbo frames:
+
+`ip link set {{ethN}} mtu {{9000}}`