Linux:grub密码设置与修改

grub密码设置与修改

默认GRUB启动参数可以的进入单用户模式从而修改root密码,如果想要给GRUB菜单设置密码，可以修改/etc/grub.conf文件（/boot/grub/grub.conf）

设置grub密码

密码生成　

　　grub-md5-crypt  　　生成md5密码

　　grub-crypt 　　　　   生成sha256密码

写入配置文件

vim /etc/grub.conf

  1 # grub.conf generated by anaconda
  2 #
  3 # Note that you do not have to rerun grub after making changes to this file
  4 # NOTICE:  You have a /boot partition.  This means that
  5 #          all kernel and initrd paths are relative to /boot/, eg.
  6 #          root (hd0,0)
  7 #          kernel /vmlinuz-version ro root=/dev/sda2
  8 #          initrd /initrd-[generic-]version.img
  9 #boot=/dev/sda
 10 default=1
 11 timeout=5
 12 splashimage=(hd0,0)/grub/splash.xpm.gz
 13 hiddenmenu
 14 password=123456   #明文密码
 15 #password --md5 $1$XEWYA/$5HUOCImxTf4UwpYQGMlue/ #密文密码 md5密码123456
 16 #password --sha-256 $5$hwX.zwZ7EMcJW0Tu$GaZZGQzvAAPfSUpK5mW.Jq3v4hZ/1IludjcWmjwPMT3 #密文密码sha密码123456
 17 title CentOS (2.6.32-642.13.1.el6.i686.debug)
 18         root (hd0,0)
 19         kernel /vmlinuz-2.6.32-642.13.1.el6.i686.debug ro root=UUID=a298ed8b-f1b6-409b-a17c-59e72d    401964 rd_NO_LUKS  KEYBOARDTYPE=pc 
　　　　KEYTABLE=us rd_NO_MD crashkernel=auto LANG=zh_CN.UTF-8 rd_NO_LV    M rd_NO_DM
 20         initrd /initramfs-2.6.32-642.13.1.el6.i686.debug.img
 21 title CentOS (2.6.32-642.13.1.el6.i686)
 22         root (hd0,0)
 23         kernel /vmlinuz-2.6.32-642.13.1.el6.i686 ro root=UUID=a298ed8b-f1b6-409b-a17c-59e72d401964     rd_NO_LUKS 　　
　　 KEYBOARDTYPE=pc KEYTABLE=us rd_NO_MD crashkernel=auto LANG=zh_CN.UTF-8 rd_NO_LVM rd_N    O_DM
 24         initrd /initramfs-2.6.32-642.13.1.el6.i686.img
 25 title CentOS 6 (2.6.32-642.el6.i686)
 26         root (hd0,0)