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Dereferencing variable inside egrep call

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# 1  
Old 01-23-2015
Dereferencing variable inside egrep call
Hi guys
I am trying to dereference a variable inside 'egrep -v ' command and getting a 'egrep: syntax error' :

Code:
$ echo $exclude_list
ts584d hf584db
for i in `echo $exclude_list`; do
   egrep -v ${i}  my_file
done
egrep: syntax error
egrep: syntax error

The syntax of the loop is correct. Not sure why 'egrep' is acting up.
Any ideas ?
Thanks
# 2  
Old 01-23-2015
Your plan will actually give you all the lines twice except those that you want to exclude. You will get them once.

Could you consider:-
Code:
exclude_list="ts584d|hf584db"
egrep -v $exclude_list my_file

This uses an expression with an 'or' in it and a single egrep command.

I hope that is gives you the output you want.




Robin
These 2 Users Gave Thanks to rbatte1 For This Post:
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