]> Julianne Frances Haugh Creation, 1991 Thomas Kłoczko kloczek@pld.org.pl shadow-utils maintainer, 2000 - 2007 Nicolas François nicolas.francois@centraliens.net shadow-utils maintainer, 2007 - now id 1 User Commands shadow-utils &SHADOW_UTILS_VERSION; id display current user and group ID names id -a The id command displays the current real and effective user and group ID names or values. If the value does not have a corresponding entry in /etc/passwd or /etc/group, the value will be displayed without the corresponding name. The optional -a flag will display the group set on systems which support supplementary groups (see initgroups 3). /etc/group Group account information. /etc/passwd User account information. getgid2 , getgroups2 , getuid2 , initgroups3