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Full Discussion: etc/passwd
Operating Systems AIX etc/passwd Post 302378042 by frank_rizzo on Sunday 6th of December 2009 03:32:03 PM
Old 12-06-2009
not sure what your trying to do but I highly recommend NOT altering the permissions on /etc/passwd. Your not improving security by doing this and will break something. /etc/security/passwd which contains encrypted passwords is already protected.
 

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whoami(1B)					     SunOS/BSD Compatibility Package Commands						whoami(1B)

NAME
whoami - display the effective current username SYNOPSIS
/usr/ucb/whoami DESCRIPTION
whoami displays the login name corresponding to the current effective user ID. If you have used su to temporarily adopt another user, whoami will report the login name associated with that user ID. whoami gets its information from the geteuid and getpwuid library routines (see getuid and getpwnam(3C), respectively). FILES
/etc/passwd username data base ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscpu | +-----------------------------+-----------------------------+ SEE ALSO
su(1M), who(1), getuid(2), getpwnam(3C), attributes(5) SunOS 5.10 14 Sep 1992 whoami(1B)
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