[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fjLp8UZBFC99qzVYwjqbfUJhyrUaiCIO0bpQlDjIISUo":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":8,"question":15,"related":16,"source":27,"type":90},[],"2024-12-07 14:49:03",169498537,[],{"count":9,"courseId":10,"courseImg":11,"courseName":12,"workId":13,"workName":14},10,"7e93e9ea514eb78ff63f311252cf5068","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F55a6d6ebdf991313991905a000c48094.jpg","Linux系统与应用","work_39131058","第3次作业-服务管理-22大数据-计入平时成绩","要将crond服务的状态设置为开机启动,使用的命令是()",[17,29,38,48,58,68,78,87,91,96],{"answer":18,"createTime":19,"id":20,"options":21,"question":26,"source":27,"type":28},[],"2024-11-25 19:13:47",167419125,[22,23,24,25],"普通用户可以查看服务的状态,但是不能重启服务","服务是运行在后台的守护进程,可以为用户提供某种服务","服务一旦运行就不能终止","计划任务服务是由系统初始化进程启动的","下列关于服务的说法错误的是()","v1",0,{"answer":30,"createTime":31,"id":32,"options":33,"question":26,"source":27,"type":28},[],"2024-11-25 19:13:53",167419131,[34,35,36,37],"sshd服务的PPID为1","状态为static的服务是由systemd在开机时启动的,root用户可以使用systemctl disable命令将其设置为开机不启动","dns提供域名解析服务","服务的配置文件修改后,可以重启服务使之生效",{"answer":39,"createTime":40,"id":41,"options":42,"question":47,"source":27,"type":28},[],"2024-11-25 19:14:03",167419135,[43,44,45,46],"所有用户都可以通过修改配置文件\u002Fetc\u002Fcrontab安排计划任务","如果cron.allow文件存在,只有文件cron.allow中的用户才能安排自己的计划任务","\u002Fetc\u002Fcrontab文件是由crontabs软件包提供的","cron.allow文件默认是不存在的,需要人工创建","关于计划任务服务,下列说法错误的是()",{"answer":49,"createTime":50,"id":51,"options":52,"question":57,"source":27,"type":28},[],"2024-11-25 19:14:08",167419139,[53,54,55,56],"systemctl status crond","systemctl restart crond","systemctl reload crond","systemctl status cron","查看计划任务服务的状态,下列命令正确的是()",{"answer":59,"createTime":60,"id":61,"options":62,"question":67,"source":27,"type":28},[],"2024-11-25 19:14:10",167419143,[63,64,65,66],"守护进程独立于用户终端并且周期性地执行某种任务或等待处理某些发生的事件","守护进程随时接受请求为用户和系统提供某项特定服务","守护进程一般在系统启动时就在后台开始运行,除非程序出现异常或者被人为终止,将一直运行,直到关机才结束","守护进程设置后也可以通过终端与用户进行交互","下面关于守护进程的说法,错误的是()",{"answer":69,"createTime":70,"id":71,"options":72,"question":77,"source":27,"type":28},[],"2024-11-25 19:14:11",167419146,[73,74,75,76],"30 3 * * * zz rm -rf \u002Fhome\u002Fzz\u002F* 365","1 1 1-5 * * zz rm -rf \u002Fhome\u002Fzz\u002F* 60","30 3 7 * * zz rm -rf \u002Fhome\u002Fzz\u002F* 12","5 1 * * 6 zz rm -rf \u002Fhome\u002Fzz\u002F*","下列配置语句,一年的周期内执行任务次数最多的是()",{"answer":79,"createTime":70,"id":80,"options":81,"question":86,"source":27,"type":28},[],167419148,[82,83,84,85],"普通用户使用crontab命令安排自己的计划任务,会生成与用户名同名的crontab格式文件,存放在\u002Fvar\u002Fspool\u002Fcron目录下","普通用户使用crontab命令安排自己的计划任务时,需要指定user-name","用户在配置计划任务时,如果配置出错,系统会给用户发送邮件,邮件存放在\u002Fvar\u002Fspool\u002Fcron\u002Fmail目录下,邮件名与用户名同名","在安排计划任务时,可以通过编写任务脚本实现,将脚本放在\u002Fetc\u002Fcron.{hourly,daily,weekly,monthly}目录下,无需重启crond服务","下列关于计划任务服务的说法,错误的是()",{"answer":88,"createTime":5,"id":6,"options":89,"question":15,"source":27,"type":90},[],[],2,{"answer":92,"createTime":5,"id":93,"options":94,"question":95,"source":27,"type":90},[],169498538,[],"用户zz通过crontab命令安排自己的计划任务时,生成的crontab格式文件的文件名为zz,用户zz()(填能\u002F不能)读该文件",{"answer":97,"createTime":5,"id":98,"options":99,"question":100,"source":27,"type":90},[],169498539,[],"用户zz需要每周清空一次宿主目录\u002Fhome\u002Fzz,请写出通过crontab -e命令安排计划任务的内容"]