12-05-2008
I have done this just today
Though this is not a good practice ...i had to do coz of my requirement
add a user (say "adm") assign the primary group of the user to "system"
#useradd -g <primary_group> <user_name>
#useradd -g system adm
set the password of user "adm"
#passwd adm
then
edit the file /etc/passwd using vi editor and change the UID of the user "adm" to 0(zero)
now login as user "adm" the user "adm" will be like root
THIS IS NOT A GOOD PRACTICE THOUGH IT WORKS
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utmpx(4) File Formats utmpx(4)
NAME
utmpx, wtmpx - utmpx and wtmpx database entry formats
SYNOPSIS
#include <utmpx.h>
/var/adm/utmpx
/var/adm/wtmpx
DESCRIPTION
The utmpx and wtmpx files are extended database files that have superseded the obsolete utmp and wtmp database files.
The utmpx database contains user access and accounting information for commands such as who(1), write(1), and login(1). The wtmpx database
contains the history of user access and accounting information for the utmpx database.
USAGE
Applications should not access these databases directly, but should use the functions described on the getutxent(3C) manual page to inter-
act with the utmpx and wtmpx databases to ensure that they are maintained consistently.
FILES
/var/adm/utmpx user access and adminstration information
/var/adm/wtmpx history of user access and adminstrative information
SEE ALSO
getutxent(3C), wait(3C)wait.h(3HEAD)
SunOS 5.10 22 Feb 1999 utmpx(4)