Add installation instruction for shell

Change-Id: I9f60e224ea8776f1705e591ab9938e86ae3640f1
diff --git a/README.md b/README.md
index 39c7d7b..04a5fd8 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,14 @@
 
 ## Installation
 
+### From the command line:
+
+```bash
+julia -e 'using Pkg; Pkg.add("https://korap.ids-mannheim.de/gerrit/ids-kl/DerekoVecs.jl")'
+```
+
+### From within Julia:
+
 ```Julia
 pkg> add "https://korap.ids-mannheim.de/gerrit/ids-kl/DerekoVecs.jl"
 ```