Multiple grep en un seul ?

grep -i -e pattern1 -e pattern2 -e patern3 ton_fichier

grep -E "pattern1|pattern2|pattern3" ton_fichier

grep "info1.*info2.*info3.*info4" 

egrep -w 'pattern1|pattern2|pattern3|pattern4' ton_fichier

grep -E 'pattern1|pattern2|pattern3|pattern4' ton_fichier

10. I can do OR with '|', but what about AND?

          grep 'paul' /etc/motd | grep 'françois'

     finds all lines that contain both 'paul' and 'françois'

grep -E "(pattern1|pattern2|pattern3)" ton_fichier