Using grep for multiple search patterns

Question

Consider I have the following stream of data:

BODY1
attrib1:  someval11
attrib2:  someval12
attrib3:  someval13

BODY2
attrib1:  someval21
attrib2:  someval2         


        

Answer 1

very simple command:

bash> grep  "attrib1\|attrib3" 

attrib1: someval11 attrib3: someval13 attrib1: someval21 attrib3: someval23 attrib1: someval31 attrib3: someval33