How do run dfs command as another user?

[#1]

Suppose my user name is "nicholas" and "nicholas" is already configured as a proxy user. Now, is there a way for "nicholas" to run a dfs command (say mkdir) as another user "foo"?

[#2 · Accepted solution]

@szetszwo, you can do this with haodop impersonation by setting the env variable $HADOOP_PROXY_USER=foo

[#3]

Thanks a lot! Ming and I have tried it. It works well.