Owl: tcb: Filesystem layout owl!root:~# ls -ld /etc/tcb/ drwx--x--- root shadow 1024 Nov 27 12:14 /etc/tcb/ owl!root:~# ls -l /etc/tcb/ drwx--s--- root auth 1024 Nov 27 12:14 root drwx--s--- joe auth 1024 Nov 27 12:14 joe owl!root:~# ls -l /etc/tcb/joe/ -rw-r----- joe auth 84 Nov 27 12:14 shadow owl!root:~# cat /etc/tcb/joe/shadow joe:$2a$08$ghnh1Q5K6kE24bY9xqQa5uSXwG2YO4O5lbj.yfLKp8BVFBusqLwxi:11320:0:99999:7::: The per-user directories are also used as scratch space for temporary and lock files which are needed during password change