Update cheatsheets

tldr/linux/uci

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# uci
+
+> Manage OpenWrt configuration files.
+> More information: <https://openwrt.org/docs/techref/uci>.
+
+- Fetch a value:
+
+`uci get {{network.lan.ipaddr}}`
+
+- List all options and their values:
+
+`uci show {{network}}`
+
+- Set a value:
+
+`uci set {{config}}.{{section}}.{{option}}={{value}}`
+
+- Add a new section:
+
+`uci add {{config}} {{section}}`
+
+- Delete a section or value:
+
+`uci delete {{config}}.{{section}}.{{option}}`
+
+- Commit changes:
+
+`uci commit {{config}}`
+
+- Discard uncommitted changes:
+
+`uci revert {{config}}`