Hadoop running wordcount in stand-alone mode has no output result

after the stand-alone hadoop, running wordcount was deployed on the unbuntu16.04 virtual machine, the output folder was not created successfully.

Environment

hadoop2.9.1
java openJDK7

Show map100% reduce0%

the error message is as follows 

java.lang.Exception: java.io.IOException: Mkdirs failed to create file:/opt/hadoop-2.9.1/optput2/_temporary/0/_temporary/attempt_local1079342681_0001_r_000000_0 (exists=false, cwd=file:/opt/hadoop-2.9.1)
    at org.apache.hadoop.mapred.LocalJobRunner$Job.runTasks(LocalJobRunner.java:491)
    at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:558)
Caused by: java.io.IOException: Mkdirs failed to create file:/opt/hadoop-2.9.1/optput2/_temporary/0/_temporary/attempt_local1079342681_0001_r_000000_0 (exists=false, cwd=file:/opt/hadoop-2.9.1)

should have been read, but no output 

File Input Format Counters 
        Bytes Read=71
    File Output Format Counters 
        Bytes Written=0

want to know why the output folder was not created successfully?

Hadoop
Aug.25,2021

read stack overflow's answer
Hadoop java.io.IOException: Mkdirs failed to create / some/path

it should be that the output path is not in HDFS, and I don't have permission to create a directory in this path. After a try, mkdir, really can't be created. So I changed the output location to a place with permission. But I don't know if it's the right thing to do? Should the current path be added to the HDFS? How do I add it? Or should the permissions of the current path be modified?

if a great god sees the answer, I would appreciate it.

= update =
it is true that the creation of the output directory was not successful because of permissions. Some tutorials on the Internet use root permissions or new users give them permission.
solution:
assign permissions to the current path
or
change the output to a place with permission

as to how to add to HDFS is the next step, stand-alone version does not need this.

Previous: Antd form binds Input and Select to report an error

Next: How to use the menu data obtained by the interface in iview-admin to write to routers.js

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1ea41fe-5cacb.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1ea41fe-5cacb.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?