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Linux常用命令-42：passwd
source link: https://xugaoxiang.com/2022/06/13/linux-cmds-42-passwd/
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passwd 命令用于设置用户的认证信息，操作需要管理员权限。
常用格式：passwd [参数]
常用参数：
# 修改当前用户的密码
passwd
# 修改root的密码
passswd root
# 锁定用户密码，不允许修改
passwd -l xugaoxiang
# 解除锁定
passwd -u xugaoxiang
# 清除密码
passwd -d xugaoxiang
# 下次登录修改密码
passwd -e xugaoxiangRecommend
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