xz: add page

pages/common/xz.md

@@ -0,0 +1,23 @@
+# xz
+
+> Compress or decompress .xz and .lzma files.
+
+- Compress a file:
+
+`xz {{file}}`
+
+- Decompress a file:
+
+`xz -d {{file.xz}}`
+
+- Decompress a file and write to stdout:
+
+`xz -dc {{file.xz}}`
+
+- Compress a file, but don't delete the original:
+
+`xz -k {{file}}`
+
+- Compress a file and attempt to improve compression ratio by using more CPU time:
+
+`xz -e {{file}}`