       ,  -
   .      -
,  ,        -
 .



1.        journal-file  
 .        -
   :

$ cat journal

# journal: add journal entries to the file

# $HOME/journal-file
file=$HOME/journal-file

date  $file

echo -n "    : "

read name

echo "$name"  $file

echo  $file

cat  $file

echo   $file

echo  $file

)      ,   ?

)           -
  read,       cat?

2.         
 ,  .    
      ?

3.    PATH?

)   PATH ,    
   :

 /usr/local/bin

 /usr/bin/Xll

 /usr/bin

 /bin

 /usr/openwin/bin

   bin ( bin  .bin    )

  

)     whereis     /usr/bin,   -/bin,  -
    ? (,      -
  .)

)   PATH       ,  
    ?

)        /usr/games   -
    PATH?

 9.  II: Bourne Again Shell                                            347