Update cheatsheets

ar

@@ -0,0 +1,30 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# ar
+
+> Create, modify, and extract from Unix archives. Typically used for static libraries (`.a`) and Debian packages (`.deb`).
+> See also: `tar`.
+> More information: <https://manned.org/ar>.
+
+- E[x]tract all members from an archive:
+
+`ar x {{path/to/file.a}}`
+
+- Lis[t] contents in a specific archive:
+
+`ar t {{path/to/file.ar}}`
+
+- [r]eplace or add specific files to an archive:
+
+`ar r {{path/to/file.deb}} {{path/to/debian-binary path/to/control.tar.gz path/to/data.tar.xz ...}}`
+
+- In[s]ert an object file index (equivalent to using `ranlib`):
+
+`ar s {{path/to/file.a}}`
+
+- Create an archive with specific files and an accompanying object file index:
+
+`ar rs {{path/to/file.a}} {{path/to/file1.o path/to/file2.o ...}}`