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how to access the file by visudo from non root user

for example

when we change user to hdfs and from user hdfs we want to print the file file.cfg we get Permission denied

how to configure the visudo in order to get read access from user hdfs

# su hdfs
$ whoami
hdfs
$ pwd
/opt/home/security
$ cat file.cfg
cat: sec.cfg: Permission denied

$ ls -ltr

-rwxr-----. 1 root root   sec.cfg

expected output

# su hdfs
$ pwd
/opt/home/security
cat file.cfg

app_q 384273462 pass BHYVF^GTYR&GV@yhgb2yr
1

You need e.g. this line in the sudo configuration:

hdfs   ALL=(ALL) NOPASSWD: /bin/cat /opt/home/security/file.cfg

and then run these commands:

su hdfs
sudo /bin/cat /opt/home/security/file.cfg

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