diff --git a/shell/alias/shell.sh b/shell/alias/shell.sh
deleted file mode 100644
index 531b4b0..0000000
--- a/shell/alias/shell.sh
+++ /dev/null
@@ -1,32 +0,0 @@
-# shorten alias
-a() {
-	alias \
-		"${@}"
-}
-
-# swap directory (current ↔ previous)
-sd() {
-	cd \
-		- ||
-		return
-}
-
-# exit terminal
-x() {
-	exit \
-		"${@}"
-}
-
-# shellcheck disable=SC2154
-[ "${SH}" = "bash" ] || return
-
-# back
-
-# shellcheck disable=SC3033
-..() {
-	cd ..
-}
-# shellcheck disable=SC3033
-...() {
-	cd ../..
-}
diff --git a/shell/shell.sh b/shell/shell.sh
index c25ab55..bfb6b98 100644
--- a/shell/shell.sh
+++ b/shell/shell.sh
@@ -110,3 +110,34 @@ shell_setup() {
 	rm --force --recursive "${file}"
 	ln --symbolic "${ENV}" "${file}"
 }
+
+# shorten alias
+a() {
+	alias \
+		"${@}"
+}
+
+# swap directory (current ↔ previous)
+sd() {
+	cd \
+		- ||
+		return
+}
+
+# exit terminal
+x() {
+	exit \
+		"${@}"
+}
+
+# shellcheck disable=SC2154
+[ "${SH}" = "bash" ] || return
+
+# shellcheck disable=SC3033
+..() {
+	cd ..
+}
+# shellcheck disable=SC3033
+...() {
+	cd ../..
+}