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Grep multiple string from input

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# 1  
Old 05-14-2014
Grep multiple string from input
How can I grep multiple strings from an input, strings are separated by space.

Strings to grep:

Code:
7680FR 6791HH 1234AA

Input:

Code:
AA 7680FR
AA 6891HH
AA 6791UA
BB 9834HA
BB 1434AB
DD 1234AA
DD 6991HH
DD 6791HH

Required output:

Code:
AA 7680FR
DD 1234AA
DD 6791HH

# 2  
Old 05-14-2014
try
Code:
grep "7680FR.*6791HH.*1234AA" filename # if you want all words
egrep -i '7680FR|6791HH|1234AA' filename # if want either of the word

filename
Code:
AA 7680FR 6791HH 1234AA
AA 6891HH
AA 6791UA
BB 9834HA
BB 1434AB
DD 1234AA
DD 6991HH
DD 6791HH

output
Code:
[Makarand] # egrep -i '7680FR|6791HH|1234AA' filename
AA 7680FR 6791HH 1234AA
DD 1234AA
DD 6791HH
[Makarand] # grep "7680FR.*6791HH.*1234AA" filename
AA 7680FR 6791HH 1234AA

# 3  
Old 05-14-2014
I have
Code:
7680FR 6791HH 1234AA

as a single variable.
# 4  
Old 05-14-2014
Try

Code:
var='7680FR 6791HH 1234AA'

Code:
grep -E "${var// /|}" file
AA 7680FR
DD 1234AA
DD 6791HH

This User Gave Thanks to clx For This Post:
Kibou
# 5  
Old 05-15-2014
Quote:
Originally Posted by clx
Try

Code:
var='7680FR 6791HH 1234AA'

Code:
grep -E "${var// /|}" file
AA 7680FR
DD 1234AA
DD 6791HH

Very nice syntax.

I wonder if the string was in a file instead, would it possible to nest it inside the same sentence somehow?

so the string is in file

Code:
cat file

Ouput:

Code:
7680FR 6791HH 1234AA

I am trying to do something like,

Code:
echo ${$(cat file)// /|}

which does not work at all.
# 6  
Old 05-15-2014
Hi Kibou,
It kind of defeats the purpose if file contains the strings you want to look for and file also contains the data you're searching. The simple way to do that is:
Code:
cat file

Assuming your strings are in string_file and your data is in data_file try:
Code:
grep -E "$(tr ' ' '|' < string_file)" data_file

or:
Code:
grep -F "$(tr ' ' '\n' < string_file)" data_file

These 2 Users Gave Thanks to Don Cragun For This Post:
Kibou Scrutinizer
# 7  
Old 05-17-2014
Quote:
Originally Posted by Don Cragun
Hi Kibou,
It kind of defeats the purpose if file contains the strings you want to look for and file also contains the data you're searching. The simple way to do that is:
Code:
cat file

Assuming your strings are in string_file and your data is in data_file try:
Code:
grep -E "$(tr ' ' '|' < string_file)" data_file

or:
Code:
grep -F "$(tr ' ' '\n' < string_file)" data_file

Thank you, Don.

I am sorry, I forgot to mention that the string and data files were different files.

I am a little perplexed with the grep -F solution. I had no idea that it could be used as an equivalent of the | operator. Smilie
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