系统的rm命令常常导致一些不愉快的事情。默认情况下rm 不会在删除文件前提是用户是否真的想这么做，删除后也不能再从系统中恢复。这意味着用户不得不为自己的意识糊涂付出惨痛的代价。    设计一个相对“安全”的delete命令来替代rm。一下是代码，请各位验收 ##建立回收站机制 ##将需要删除的文件移动到~/.trash中 if [ ! -d ~/.trash ] then         mkdir ~/.trash fi if [ $# -eq 0 ] then         #提示delete的用法         echo "Usage:delete file1 [file2 file3 ...]" else         echo "You are about to delete these files:"         echo $@         #要求用户确认是否删除这些文件。回答N或n放弃删除，其他字符表示确认         read -p "Are you sure to do that? [Y/n]:" reply         if [ "$reply" != "n" ] && [ "$reply" != "N" ]         then                  for file in $@                 do                         #判断文件活目录是否存在                         if [ -f "$file" ] || [ -d "$file" ]                         then                                 mv -b "$file" ~/.trash/       else                                 echo "$file: NO such file or directory"                         fi                 done         #如果用户回答N或n         else                 echo "NO file removed"         fi fi # 这个delete不完美， 他不能处理文件名中存在空格的情况 # touch "zhang san" # delete zhang\ san You are about to delete these files: zhang san Are you sure to do that? [Y/n]:y zhang: NO such file or directory san: NO such file or directory