[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fDEpQQ0wYApD9wIqyQNMLF6GG6lUW4eWW9OSGnTMxqkE":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":21,"type":22},[],"2023-11-26 18:04:31",107228323,[8,9,10,11],"echo hello hello","hello hello","echo hello","hello",{"courseId":13,"courseImg":14,"courseName":15},"e48569c28285f3c10fe1fc739e8bb846","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8fa881ec838719e1c9ec7f8deda202bf.jpg","Linux操作系统","以下命令的输出结果是( ) a=hello echo "echo `echo hello` $a"",[18,23,31,40,48,58,67,76,85],{"answer":19,"createTime":5,"id":6,"options":20,"question":16,"source":21,"type":22},[],[8,9,10,11],"v1",0,{"answer":24,"createTime":5,"id":25,"options":26,"question":30,"source":21,"type":22},[],107228324,[27,28,29,29],"$$","$0","$","以下哪个系统变量的值代表上一条命令的执行结果( )",{"answer":32,"createTime":5,"id":33,"options":34,"question":39,"source":21,"type":22},[],107228325,[35,36,37,38],"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":41,"createTime":5,"id":42,"options":43,"question":47,"source":21,"type":22},[],107228326,[44,45,46],"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":49,"createTime":50,"id":51,"options":52,"question":57,"source":21,"type":22},[],"2023-11-26 18:04:32",107228328,[53,54,55,56],"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 $a",{"answer":59,"createTime":5,"id":60,"options":61,"question":66,"source":21,"type":22},[],107228329,[62,63,64,65],"变量i的值为6","变量e的值为2+4","变量d的值为6","变量c的值为6","以下代码下面说法正确的是( ) a=2 b=4 c=$a+$b d=$(( $a+$b)) declare -i e=$a+$b",{"answer":68,"createTime":5,"id":69,"options":70,"question":75,"source":21,"type":22},[],107228330,[71,72,73,74],"season4 = $a$b","season4=$a $b","season4=$a$b","4season=$a$b","下列变量的定义正确的是",{"answer":77,"createTime":78,"id":79,"options":80,"question":83,"source":21,"type":84},[],"2023-11-30 17:23:45",110212194,[81,82],"正确","错误","命令fo1|fo2 2> fo3 中,fo1 fo2 fo3都是一个可执行命令",3,{"answer":86,"createTime":78,"id":87,"options":88,"question":89,"source":21,"type":84},[],110212199,[81,82],"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"]