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# 1  
Old 02-15-2011
egrep
Hi,

I am wondering if it's possible to link multiple patterns with egrep.

Here here is what I am doing :

Code:
 grep -v ";;" | grep -v ARC_TIME | grep -v \* | grep -v STAS0

Can I do all of this by invoking egrep just once ?

Thanks
# 2  
Old 02-15-2011
That is the only way to 'AND' the patterns in grep AFAIK.
Alternative awk solution,

Code:
awk '!/;;/ && !/ARC_TIME/ && !/\*/ && !/STASO/ {print}' file

This User Gave Thanks to clx For This Post:
Aswex
# 3  
Old 02-15-2011
Code:
grep -Ev ';;|ARC_TIME|\*|STAS0'

This User Gave Thanks to Scrutinizer For This Post:
Aswex
# 4  
Old 02-15-2011
Another way:

grep -v -e pattern_1 -e pattern_2 -e pattern_3

Here we invoke grep only once; and this is what you want.
# 5  
Old 02-15-2011
Thanks all for your help.

Instead of using the "grep -v" I found a way by using egrep to only keep what needed.

here is how I do it

Code:
egrep '(pattern_1|pattern_2'

Thanks again for your help
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