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

tldr/linux/opkg

@@ -0,0 +1,37 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# opkg
+
+> A lightweight package manager used to install OpenWrt packages.
+> More information: <https://openwrt.org/docs/guide-user/additional-software/opkg>.
+
+- Install a package:
+
+`opkg install {{package}}`
+
+- Remove a package:
+
+`opkg remove {{package}}`
+
+- Update the list of available packages:
+
+`opkg update`
+
+- Upgrade all the installed packages:
+
+`opkg upgrade`
+
+- Upgrade one or more specific package(s):
+
+`opkg upgrade {{package(s)}}`
+
+- Display information for a specific package:
+
+`opkg info {{package}}`
+
+- List all the available packages:
+
+`opkg list`