Help using grep -f 1

[johngiggs]

When I enter in a series of strings in a pattern file to be used by grep -f, is there any way to specify that it return the results in the order specified in the pattern file rather than as it finds them?

I.E. I have the pattern file that contains something like the following:

backup7
backup2
backup4
backup13
backup1
...

And the grep -f returns the following:

backup13
backup4
backup7
backup1
...

How can I make it read the file and grep for the results in the order specified in the pattern file?

Any help would be greatly appreciated.

Thanks,

John

 

[PHV]

Instead of

 grep -f pattern.lst ...

try something like this:

while read PAT
do
  grep "$PAT" ...
done<pattern.lst

Hope This Help
PH.

 

[johngiggs]

PHV,

Thank you for your help. I had thought of using that, however I thought that it would be very CPU intensive. I ended up using another solution and incorporating your suggestion above.

John