sudo grub-mkpasswd-pbkdf2 // 输入并二次确认密码后,会输出一个加密后的密码字符串,类似如下所示: PBKDF2 hash of your password is grub.pbkdf2.sha512.10000.2932A1217B661566186EE6213A992F6296F947F44E2A52E01EC42B3C0DD079342363378E52A7C0307F78027595FDD9F72C4788E66B74F66D9B154957818CAE0D.FC379727A4D967F4F1C2A03B0284021E8F209253BA3380C6F9D04391C27FCB072DE367ADC64540B6EE809E261DF0EEB0EF0568CFA74FD383C77F2A05DD1EA50E