     shadow   -
.   *LK*  NP    , , -
 (locked)    (no password).      -
   ,     ,   -
    .      
     .  
      .
   shadow      ,     passwd.
   passwd        shadow.

/etc/sysconfig. ,     .
     /usr/share/doc/initscripts*/
s'ysconfig.txt.

/.    /proc      Linux.   
    ,   : 
,  ,  , , -
 ,    .   /proc   -
 ,      system-config-proc (. . 11.2). -
        /proc.  :

$ sleep 10000 &

[1] 17924
$ cd /proc/17924

$ Is -1
total 0

-   1 alex     alex            0 Feb 2 17 13 crndline
Irwx-   1 alex     alex            0 Feb 2 17 13 cwd -> /home/alex

---   1 alex     alex            0 Feb 2 17 13 environ
Irwx------   1 alex     alex            0 Feb 2 17 13 exe -> /bin/sleep

dr-x-   2 alex     alex            0 Feb 2 17 13 fd
prrr   1 alex     alex            0 Feb 2 17 13 maps

-rw   1 alex     alex            0 Feb 2 17 13 mem
Irwx-   1 alex     alex            0 Feb 2 17 13 root -> /

-r--rr   1 alex     alex            0 Feb 2 17 13 stat

-rr--r   1 alex     alex            0 Feb 2 17 13 statm

-   1 alex     alex            0 Feb 2 17 13 status

$ cat status

Name:   sleep

State: S (sleeping)

Pid:    17924

PPid:   17909

TracerPid:    0

Uid:    0000

Gid:    0000

FDSize: 256

Groups: 0 1 2 3 4 6 10

VmSize:     1144 kB

VmLck:         0 kB

VmRSS:       420 kB

VmData:       20 kB

456                                        IV.  