-rw-rw-r-- 1 alex   group      14 Jan 22 08:54 file2

-rw-rw-r-- 1 alex   group      14 Jan 22 08:55 file3
$ mkdir version(A,B,C,D,E}
$ Is -1
total 8

-rw-rw-r 1 alex   group      14 Jan 22 08 54 filel

-rw-rw-r-- 1 alex   group      14 Jan 22 08 54 file2

-rw-rw-r 1 alex   group      14 Jan 22 08 55 file3
drwxrwxr-x 2 alex   group    1024 Jan 25 13 27 versionA
drwxrwxr-x 2 alex   group    1024 Jan 25 13 27 versionB
drwxrwxr-x 2 alex   group    1024 Jan 25 13 27 versionC
drwxrwxr-x 2 alex   group    1024 Jan 25 13 27 versionD
drwxrwxr-x 2 alex   group    1024 Jan 25 13 27 versionE

        -
   ,      ( ):

$ Is -1                                                                       ;

total 3

-rw-rw-r 1 alex   group      14 Jan 22 08:54 filel

-rw-rw-r 1 alex   group      14 Jan 22 08:54 file2

-rw-rw-r 1 alex   group      14 Jan 22 08:55 file3
$ mkdir version[A-E]
$ Is -1
total 4

-rw-rw-r 1 alex   group      14 Jan 22 08:54 filel

-rw-rw-r 1 alex   group      14 Jan 22 08:54 file2

-rw-rw-r 1 alex   group      14 Jan 22 08:55 file3
drwxrwxr-x 2 alex   group    1024 Jan 25 13:38 version[A-E]

     ,   version [A-E],
     mkdir,       .

         
   (,  ):

$ prefix=Alex
$ echo $prefix -   ${prefix}ander.

Alex -   Alexander.

     prefix      ander
 ,     prefix  .  -
 Alexander   Alex ander.

~   

  " "  6     
       .  
     .

 (~)   ,      
 .     ,   -
       (/)      -
      .       (
           

338                                       III.   Red Hat Linux