AIX 3 /etc/security/passwd ! 　　or /tcb/auth/files// 　　A/UX 3.0s /tcb/files/auth/?/* 　　BSD4.3-Reno /etc/master.passwd * 　　ConvexOS 10 /etc/shadpw * 　　ConvexOS 11 /etc/shadow * 　　DG/UX /etc/tcb/aa/user/ * 　　EP/IX /etc/shadow x 　　HP-UX /.secure/etc/passwd * 　　IRIX 5 /etc/shadow x 　　Linux 1.1 /etc/shadow * 　　OSF/1 /etc/passwd[.dir　.pag] * 　　SCO Unix #.2.x /tcb/auth/files// 　　SunOS4.1 c2 /etc/security/passwd.adjunct ##username 　　SunOS 5.0 /etc/shadow 　　 　　System V Release 4.0 /etc/shadow x 　　System V Release 4.2 /etc/security/* database 　　Ultrix 4 /etc/auth[.dir　.pag] * 　　UNICOS /etc/udb * ，