Grep multiple patterns

Shell Programming and Scripting
1

Hi,

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.

Malay

2

try !!!!
cat /x/y/oratab | egrep -i "pattern1|pattern2"

Shihab

3

Depending on your version of grep, this might also work:

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

4

Why the UUOC ?

Wouldnt this work ?

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

vino

5

or ...

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