grub加密有明文加密码和密文加密

    命令：grub-md5-crypt

        [root@lnmp01 rc.d]# grub-md5-crypt

    Password:                     Retype password:     $1$p9Y9a$Id5hMpbsHLNZFs0gPbRRI.

密码加密后密文：$1$p9Y9a$Id5hMpbsHLNZFs0gPbRRI.

配置/boot/grub/grub.conf

    [root@lnmp01 rc.d]# vim /boot/grub/grub.conf

    # grub.conf generated by anaconda    #    # Note that you do not have to rerun grub after making changes to this file    # NOTICE:  You have a /boot partition.  This means that    #          all kernel and initrd paths are relative to /boot/, eg.    #          root (hd0,0)    #          kernel /vmlinuz-version ro root=/dev/sda2    #          initrd /initrd-[generic-]version.img    #boot=/dev/sda    default=0    timeout=5    splashp_w_picpath=(hd0,0)/grub/splash.xpm.gz    hiddenmenu

    #在此处对grub加密

    password --md5 $1$p9Y9a$Id5hMpbsHLNZFs0gPbRRI.

    title CentOS 6 (2.6.32-504.el6.x86_64)

        root (hd0,0)如果password --md5 $1$p9Y9a$Id5hMpbsHLNZFs0gPbRRI.替换成：password  123456

则表示使用明文加密。