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GRUB

用password和password_pbkdf2可以设置密码。不过这个密码设置不需要放到启动项的前面,放后面也一样有效,所以放到40_custom也可以。配置如下:

$ cat /etc/grub.d/40_custom
#!/bin/sh
exec tail -n +3 $0
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.

set superusers="root"
password_pbkdf2 root grub.pbkdf2.sha512.10000.longhashstring
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