System.getenv(“SYSTEM”) 返回什么？

Question

yesterday i tried to print all the system environment variables and i saw one named "SYSTEM".

I never seen this variable so i tried to print it, the result is:

XaD+cVnuAOayI4XQ6c8iVEAxfIHSnPO1bkqP8rrze6IWpG/wufHLs3+tcdOL4z2HVFbmVV1q/IXAE5E6ysGZnRspxUMpt3l5cvLt2kofNi9weo4nFD8mtfmNXkR0Q+dxISt9BkIlA5lwUQil58KBFBxUMvvKkj7d83MHOrZrgG7+oseT4oFH3JkdOFY4IsYgwQk8fwyhDDzdvKn7gy3PiwPsnmhXwf5JLQgzOg39mLWhv5hpQzT/N9NHHjQ1U3DgUirIx+NcZrujDj2fJM1y6g==

What does exactly returns System.getenv("SYSTEM") ? Why it returns some kind of encrypted text?

Answer 1

The System.getenv() function returns a value of an environment variable configured in your operating system.

https://docs.oracle.com/javase/tutorial/essential/environment/env.html

For example- if we will create a new environment variable called FooFoo with the value of "Hello World!"

export FooFoo="Hello World!"

The following code: System.out.println(System.getenv("FooFoo")); will have the output

"Hello World!"

In your scenario- some software you installed has created an environment variable called SYSTEM, and it have the value of the encrypted string that you mentioned.

This environment variable is not one of the default windows 10 environment variables

https://pureinfotech.com/list-environment-variables-windows-10/

Nor one of the default linux environment variables

https://www.cyberciti.biz/faq/linux-list-all-environment-variables-env-command/