linux/pacman: add more useful commands

pages/linux/pacman.md

@@ -25,3 +25,11 @@
 - list only the explicitly installed packages and versions
 
 `pacman -Qe`
+
+- find which package owns a certain file
+
+`pacman -Qo filename`
+
+- empty package cache to free up space
+
+`pacman -Scc`