exa: add page (#1589)

pages/common/exa.md

@@ -0,0 +1,27 @@
+# exa
+
+> A modern replacement for `ls` (List directory contents).
+
+- List files one per line:
+
+`exa --oneline`
+
+- List all files, including hidden files:
+
+`exa --all`
+
+- Long format list (permissions, ownership, size and modification date) of all files:
+
+`exa --long --all`
+
+- List files with the largest at the top:
+
+`exa --reverse --sort={{size}}`
+
+- Display a tree of files, three levels deep:
+
+`exa --long --tree --level={{3}}`
+
+- List files sorted by modification date (oldest first):
+
+`exa --long --sort={{modified}}`