         : -
          (    
). ,    ()   
 /home/sam/jail         /home/sam 
.      jail   / ( jail).

   ,    
(jail  , ) chroot,      
, , ,     ,
   .    , 
    chroot:    
      ,    
  .

 chroot

   chroot :   root  
/usr/sbin/chroot .     ,  -
    .      root 
 /home/sam.      
chroot  ()  /home/sam/jail:

# /usr/sbin/chroot jail

/usr/sbin/chroot: /bin/bash: No such file or directory
fHer    aaoa^

    chroot   ,  
 bash  .       /
  jail,  chroot    ,   /bin/bash.
  chroot  ,     .

    chroot ,  , .  -
    bash    chroot,   
jail   bin (/home/sam/jail/bin)     /bin/bash. -
   bash      (. 
"  "  27),   jail    
.      /lib.     -
 ,  bash,     Ida  -
,    bash,       /lib:

$ pwd

/home/sam/jail
$ mkdir bin lib
$ cp /bin/bash bin
$ Idd bin/bash

libtermcap.so.2 => /lib/libtermcap.so.2 (Ox4002a000)

libdl.so.2 => /lib/libdl.so.2 (Ox4002f000)

libc.so.6 => /lib/tls/libc.so.6 (042000000)

/lib/ld-linux.so.2 => /lib/ld-linux.so.2 (040000000)
$ cp /lib/libterncap.so.2 lib
$ cp /lib/libdl.so.2 lib
$ cp /lib/tls/libc.so.6 lib
$ cp /lib/ld-linux.so.2 lib

 11.  :                     429