field=$(awk -F ':' '/^root/{print $2}' /etc/shadow)
password=$(openssl passwd -1 123456)
sed -i '/^root/s%'$field'%'$password'%' /etc/shadow
field=$(awk -F ':' '/^root/{print $2}' /etc/shadow)
password=$(openssl passwd -1 123456)
sed -i '/^root/s%'$field'%'$password'%' /etc/shadow
本文标题：忘记 root 密码修改 /etc/shadow 重置密码
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