Rename regression to test

test/apps/scripts/shell_cmd.sh

@@ -0,0 +1,39 @@
+#!/bin/sh
+
+# SPDX-License-Identifier: MPL-2.0
+
+set -e
+set -x
+
+SCRIPT_DIR=/test
+cd ${SCRIPT_DIR}
+
+touch hello.txt
+mv hello.txt hello_world.txt
+rm hello_world.txt
+
+awk '{print $2}' shell_cmd.sh
+cp shell_cmd.sh shell_cmd_backup.sh
+cat shell_cmd_backup.sh
+rm shell_cmd_backup.sh
+
+ln -s shell_cmd.sh tesk_cmd_soft_link
+readlink -f tesk_cmd_soft_link
+tail -n 1 tesk_cmd_soft_link
+rm tesk_cmd_soft_link
+
+ln shell_cmd.sh tesk_cmd_hard_link
+tail -n 1 tesk_cmd_hard_link
+unlink tesk_cmd_hard_link
+
+sed 3q shell_cmd.sh
+
+find . -name "*shell_cmd*" 
+
+mkdir foo
+rmdir foo 
+
+echo "Hello world from asterinas" > hello.txt
+rm hello.txt
+
+cd ..