[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fKoyPSWYkHGX7v9A_16JehQXkVVqYO3o6PwFskhgZe3o":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":10,"question":14,"related":15,"source":26,"type":84},[],"2023-11-30 17:23:45",110212194,[8,9],"正确","错误",{"courseId":11,"courseImg":12,"courseName":13},"e48569c28285f3c10fe1fc739e8bb846","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8fa881ec838719e1c9ec7f8deda202bf.jpg","Linux操作系统","命令fo1|fo2 2> fo3 中,fo1 fo2 fo3都是一个可执行命令",[16,28,36,45,53,63,72,81,85],{"answer":17,"createTime":18,"id":19,"options":20,"question":25,"source":26,"type":27},[],"2023-11-26 18:04:31",107228323,[21,22,23,24],"echo hello hello","hello hello","echo hello","hello","以下命令的输出结果是( ) a=hello echo "echo `echo hello` $a"","v1",0,{"answer":29,"createTime":18,"id":30,"options":31,"question":35,"source":26,"type":27},[],107228324,[32,33,34,34],"$$","$0","$","以下哪个系统变量的值代表上一条命令的执行结果( )",{"answer":37,"createTime":18,"id":38,"options":39,"question":44,"source":26,"type":27},[],107228325,[40,41,42,43],"linux is $linux","linux is linux","$var is $var","linux is $var","以下命令的输出结果是( ) var=linux echo "$var is \\$var"",{"answer":46,"createTime":18,"id":47,"options":48,"question":52,"source":26,"type":27},[],107228326,[49,50,51],"ls \u002Ftmp\u002Ftest && touch \u002Ftmp\u002Ftest\u002Fabc","ls \u002Ftmp\u002Ftest ; touch \u002Ftmp\u002Ftest\u002Fabc","ls \u002Ftmp\u002Ftest || touch \u002Ftmp\u002Ftest\u002Fabc","查看目录\u002Ftmp\u002Ftest是否存在,存在则touch一个文件abc",{"answer":54,"createTime":55,"id":56,"options":57,"question":62,"source":26,"type":27},[],"2023-11-26 18:04:32",107228328,[58,59,60,61],"变量a被取消","变量b被取消","变量a和变量b被取消","报错,变量a和变量b都不被取消","以下脚本运行后,哪个说法是正确的( ) a=b b=c unset $a",{"answer":64,"createTime":18,"id":65,"options":66,"question":71,"source":26,"type":27},[],107228329,[67,68,69,70],"变量i的值为6","变量e的值为2+4","变量d的值为6","变量c的值为6","以下代码下面说法正确的是( ) a=2 b=4 c=$a+$b d=$(( $a+$b)) declare -i e=$a+$b",{"answer":73,"createTime":18,"id":74,"options":75,"question":80,"source":26,"type":27},[],107228330,[76,77,78,79],"season4 = $a$b","season4=$a $b","season4=$a$b","4season=$a$b","下列变量的定义正确的是",{"answer":82,"createTime":5,"id":6,"options":83,"question":14,"source":26,"type":84},[],[8,9],3,{"answer":86,"createTime":5,"id":87,"options":88,"question":89,"source":26,"type":84},[],110212199,[8,9],"命令read -p "input your name:" $name的功能是提示用户输入姓名并把用户输入的名字保存到name变量中"]