AWK OPERATORS

AND

# any order
awk '/pattern1/ && /pattern2/' PATH
# specific order
awk '/pattern1.*pattern2/' PATH			

OR

awk '/pattern1|pattern2/' PATH

NOT

awk '!/pattern/' PATH

##Examples

• Find all php files whose CONTENTS have changed in the last seven days and look for any strings that don't contain "nextend"

find -type f -name "*.php" -ctime -7 | sed -n '/nextend/!p'
find -type f -name '*.php' -ctime -7 | awk '!/nextend/'

• Find all php files whose contents have changed between FIRST DATE and SECOND DATE

find -type f -name "*.php" -newerct 2016-01-29 ! -newerct 2016-02-24

• Actively watch the access log and show all lines containing "POST" but not "404"

tail -f access_log | sed -n '/POST/!d; /404/!p'
tail -f access_log | awk '/POST/ && !/404/'