Move bash config to shell subdir

shell/scripts.d/10-random.sh

@@ -0,0 +1,8 @@
+function random() {
+     if [[ $# -eq 0 ]]; then
+          num=32
+     else
+          num=$1
+     fi
+     cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w $num | head -n 1
+}