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whoami - display the effective current username
whoami
whoami displays the login name corresponding to the current
effective uer ID. If you have used su(1V) 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(2V) and getpwent(3V), respectively).
- /etc/passwd
- username data base
- /etc/utmp
- database of users currently logged in
su(1V), who(1), getuid(2V), getpwent(3V), utmp(5V)
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