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grep multiple patterns

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Old 09-23-2005
malaymaru malaymaru is offline
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Grep multiple patterns


Can we grep multiple patterns in UNIX.
for example:
cat /x/y/oratab | grep -i "pattern1|pattern2" .... etc

I require the syntax for multiple patterns. | is not working as I explained in example.

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Old 09-23-2005
shihabvk shihabvk is offline
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try !!!!
cat /x/y/oratab | egrep -i "pattern1|pattern2"

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Old 09-23-2005
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Depending on your version of grep, this might also work:

cat /x/y/oratab | grep -i -e pattern1 -e pattern2
Old 09-23-2005
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Why the UUOC ?

Wouldnt this work ?

grep -i -e pattern1 -e pattern2 /x/y/oratab

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Old 09-25-2005
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or ...

egrep -i "str1|str2" /your/file

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