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

tldr/hostname

@@ -0,0 +1,29 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# hostname
+
+> Show or set the system's host name.
+> More information: <https://manned.org/hostname>.
+
+- Show current host name:
+
+`hostname`
+
+- Show the network address of the host name:
+
+`hostname -i`
+
+- Show all network addresses of the host:
+
+`hostname -I`
+
+- Show the FQDN (Fully Qualified Domain Name):
+
+`hostname --fqdn`
+
+- Set current host name:
+
+`hostname {{new_hostname}}`