当你完成了所有的测试,使用下面的命令恢复原状.要非常小心! BUT BE VERY VERY CAREFUL:
bash $ rm -Rf picture/test_directory
You could lose more than you bargin for, test_directory should be what you entered for $DIRPATH in the scripts above. (It never hurts for first time user to slip over somewhere else and create a directory tree, copy file to it, and test this command line before using it on something irreplacable.) Again read the manual.