[{"createTime":1735734952000,"id":1,"img":"hwy_ms_500_252.jpeg","link":"https://activity.huaweicloud.com/cps.html?fromacct=261f35b6-af54-4511-a2ca-910fa15905d1&utm_source=V1g3MDY4NTY=&utm_medium=cps&utm_campaign=201905","name":"华为云秒杀","status":9,"txt":"华为云38元秒杀","type":1,"updateTime":1735747411000,"userId":3},{"createTime":1736173885000,"id":2,"img":"txy_480_300.png","link":"https://cloud.tencent.com/act/cps/redirect?redirect=1077&cps_key=edb15096bfff75effaaa8c8bb66138bd&from=console","name":"腾讯云秒杀","status":9,"txt":"腾讯云限量秒杀","type":1,"updateTime":1736173885000,"userId":3},{"createTime":1736177492000,"id":3,"img":"aly_251_140.png","link":"https://www.aliyun.com/minisite/goods?userCode=pwp8kmv3","memo":"","name":"阿里云","status":9,"txt":"阿里云2折起","type":1,"updateTime":1736177492000,"userId":3},{"createTime":1735660800000,"id":4,"img":"vultr_560_300.png","link":"https://www.vultr.com/?ref=9603742-8H","name":"Vultr","status":9,"txt":"Vultr送$100","type":1,"updateTime":1735660800000,"userId":3},{"createTime":1735660800000,"id":5,"img":"jdy_663_320.jpg","link":"https://3.cn/2ay1-e5t","name":"京东云","status":9,"txt":"京东云特惠专区","type":1,"updateTime":1735660800000,"userId":3},{"createTime":1735660800000,"id":6,"img":"new_ads.png","link":"https://www.iodraw.com/ads","name":"发布广告","status":9,"txt":"发布广告","type":1,"updateTime":1735660800000,"userId":3},{"createTime":1735660800000,"id":7,"img":"yun_910_50.png","link":"https://activity.huaweicloud.com/discount_area_v5/index.html?fromacct=261f35b6-af54-4511-a2ca-910fa15905d1&utm_source=aXhpYW95YW5nOA===&utm_medium=cps&utm_campaign=201905","name":"底部","status":9,"txt":"高性能云服务器2折起","type":2,"updateTime":1735660800000,"userId":3}]
判断题
Init 4命令的作用是进入linux操作系统的安全模式。( × )(大小写)
init3命令的作用是进入完全多用户模式。( ×)(空格)
\代表linux操作系统的根目录。( × )
单项选择题
在默认的bash shell下列哪个行提示符代表的是普通用户(D)
A.# B.% C.@ D.$
下列对shutdown -k的命令的作用描述正确的是(C)
A.关机 B.重启 C.发送消息 D.挂起
能够起到联机帮助功能的命令是(B)
A.help B.man C.aid D.assist
不定项选择题
下列哪个命令可以起到linux操作系统关机的效果(BD)
A.Poweroff B.shutdown -h C.shutdown -r D.halt
下列哪个命令可以起到linux操作系统重启的效果(C)
A.Poweroff B.shutdown -h C.shutdown -r D.halt
填空题
Linux目录采用_多级树形_结构。
[root@localhost home]行首提示的几个组成部分分别代表_当前登录的用户的用户名_,地址域名,当前登录的主机名__和__当前所在的目录_。
问答题
简述一下su和sudo的使用方式和作用。
su
用于更改用户的身份
管理员切换到普通用户:不需要密码
普通用户切换到管理员用户:需要输入密码
sudo
直接获取超级用户的权限而不需要输入密码(一般情况,具体根据系统设置)