Ipr:  

 Ipr ("line printer"   )     
  . Linux    ,   -
          . -
         
     .       
     -,   Ipr   
   ,      ,    
  .     report:

$ Ipr report

      ,    
   .      
      14.

           

mailroom:

$ Ipr -Pmailroom report
     ,      Ipq:

$ Ipq

lp is ready and printing (Ip     )
Rank Owner   Job Files                .        Total Size
active alex    86 (standard input)                954061 bytes

    (alex)     -
;     .       86   -
   Iprm,          :

$ Iprm 86

          . -
          laseri:

$ Ipr -Plaseri OS.txt 108.txt 12.txt

grep:  

 grep ("global regular expression print"     -
2)         , 
     .     ,   -
 ,    ,   .

 grep  . 5.4    memo ,   ,  -
  .     memo   ,  ,
  , grep     ,    
 .         
,           .

2       ed    UNIX,   Red
Hat Linux: g/re/p.    g  "global" (), re  "regular expression"
( ),   ,    "print" ().

 5.  Linux                                                           159