cat file | grep <field> | wc -l

On Thu, 18 Feb 1999, Lucy Premus wrote:

> Is there a korn shell function to count lines in a file that have one field
> thats the same.  For example, if my file looks as follows:
>
> server1   NYHO
> server2   NYHO
> server3   NYHO
> server4   RISC
> server5   RISC
> server6  NYMLB
> server7  NYMLB
> server8  NYMLB
> server9  NYMLB
>
> I want the script to read the file and count up that there are 3 NYHO, 2 RISC,
> and 4 NYMLB.  However theres a catch, in reality my files will be much larger
> than this containing much more than 3 different instances.  I don't want to 
> have
> to compare each line to the literal (ie. NYHO, RISC or NYMLB) because theres
> just too many of them.  Is there any easier way?
>