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[root@apl mail]# w
 17:38:08 up 2 days,  1:58,  5 users,  load average: 0.04, 0.09, 0.06
USER     TTY      from              LOGIN@   IDLE   JCPU&nb ......

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2.useradd netseek Ìí¼ÓÒ»¸önetseekÓû§
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# useradd user1
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java.lang.reflect.InvocationTargetException
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        at sun.ref ......
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