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A little more detail that may be missed in the man page.<br />
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Running &quot;su - &lt;ID&gt;&quot; will change to that user but also run that user's .profile/.cshrc or whatever. &nbsp;The - symbol makes this happen.<br />
<br />
Just running &quot;su &lt;ID&gt;&quot; changes to that user but does not run that user's .profile/.cshrc or whatever.
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A little more detail that may be missed in the man page.

Running "su - <ID>" will change to that user but also run that user's .profile/.cshrc or whatever.  The - symbol makes this happen.

Just running "su <ID>" changes to that user but does not run that user's .profile/.cshrc or whatever.

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to be more exact:<br />
&nbsp; su - ID &nbsp;# &nbsp;is identical to a login (see man su)
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to be more exact:
  su - ID  #  is identical to a login (see man su)

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I am a new Solaris administrator. When you &quot;su&quot; to another person ex: (su - James). &nbsp;What should I use the root password or my user password to assume a users identity. Neither have been working for me.<br />
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I am a new Solaris administrator. When you "su" to another person ex: (su - James).  What should I use the root password or my user password to assume a users identity. Neither have been working for me.



Changing Identity(su command)

Unix is a multitasking, multi-user computer operating system originally developed in 1969 at Bell Labs. Today, it is a modern OS with many commercial flavors and licensees, including FreeBSD, Hewlett-Packard’s UX, IBM AIX and Apple Mac OS-X. Apart from its command-line interface, most UNIX variations support the standardized X Window System for GUIs, with the exception of the Mac OS, which uses a proprietary system.