  ?      (),     
 ()    (.  "kill:   -
"  11) ,   locktty.

  trap (.  "trap:  "    ) 
  locktty      
     (,    ).
  18 ,         
<CONTROL+Z> ( ,   ).  
  . 28.5.  stty -e   ,    
,   .      
 .   -   
 ,      key 1,   
          key_2. 
key_3=     (NULL) .   key_l  key_2
,  locktty   (   tput)    
until.          
  key_3.    ,   -
  (key_2)  until ,  -  .

break  continue

 for, while  until      break 
continue.  break   ,   
done,   .  continue   
done,    .

      . 
for...in    1  10.   if   ,
      3 ($index -le 3).   if -
  ,       8 ($index -ge 8). 
  if  echo   .   , 
  3,  if   continue    continue, -
   echo $index   if     for.
   8  if   break    break,
    for.   index   echo:

$ cat brk

for index in 123456789 10
do

if [ $index -le 3 ] ; then
echo ""
continue
fi

#

echo $index

#

if [ $ index -ge 8 ] ; then
echo ""
break
fi
done

 28.   Bourne Again Shell                                887