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Linux常用命令-116：shutdown
source link: https://xugaoxiang.com/2022/10/11/linux-cmds-116-shutdown/
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shutdown 命令是用于关闭系统，作用等同于 halt 命令。
语法格式：shutdown [参数]
# 立即关闭系统
shutdown -h now
# 立即重启系统
shutdown -r now
# 10分钟后关机，同时发送消息给登录用户
shutdown +10 "马上关机啦，赶快保存资料，不然一天白忙啦！"
# 设定系统关闭时间也就是定时关机，如20:30
shutdown -h 20:30
# 如果之前设定了定时关机，可以取消
shutdown -cRecommend
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