Piping with grep

Linux and Unix-Like Ubuntu
1

Hi everybody,

I have a big file with blast results (if you know what this means, otherwise look at it just as a text file with a specific form).

I am trying to extract some ids from within this file, which have certain parameters.
For example, some Of my IDs have the term 'No hit results' connected to them.
This is what I am trying to extract.
this is how it looks loike:

Query= ssc-miR-345-3p_st

Length=21

RID: 1307544734-17235-35154543375.BLASTQ1

***** No hits found *****

Lambda     K      H
    1.37    0.711     1.31 

Gapped
Lambda     K      H
    1.37    0.711     1.31 

Effective search space used: 0

In the complete file I have 15517 'Query=' and for 389 of them I can also find 'No hits found'.

My Qeustion is how can I found out which Queries are connected to this 'No hits'.

I tried it with :

split -a 5 -p '/Query=' filename

grep -lr 'No' . | grep 'Query='

But this doesn't work.

I just don't understand how to grep in many files and than pipe it to a second grep option.

I would be happy for any help.
Thanks

Assa

2

Bumping up posts or double posting is not permitted in these forums.

Please read the rules, which you agreed to when you registered, if you have not already done so.

You may receive an infraction for this. If so, don't worry, just try to follow the rules more carefully. The infraction will expire in the near future

Thank You.

The UNIX and Linux Forums.

1 Like