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I think in case the group id is found, then id returns '0' else its exit status is '1'.

But my idea too is that 'id' should be a better approach. getent again is a pattern matching thing and could be ambiguous if there are users like test, test1, test2 and we are looking only for test...

Hi

Could anyone please suggest how we can check in Linux if a user or a group name is already existing? In case of a user the command should also be able to specify the user with a given directory...

Hi

How can I write a Java program to execute Linux commands? What is the best approach:


Invoking the Linux shell within Java and executing commands
or, using the Java APIs to do the stuff....