Monitor log file for string

tail -fn0 logfile | \
while read line ; do
        echo "$line" | grep "pattern"
        if [ $? = 0 ]
        then
                ... do something ...
        fi
done

Source: stackoverflow.com

Similar codes

6 votes184 views3 answers
How to install virtualbox in ubuntu
Shell/Bash
0 vote202 views1 answer
Error: <class 'xmlrpclib.Fault'>, <Fault 6: 'SHUTDOWN_STATE'>: file: /usr/lib/python2.7/xmlrpclib.py line: 800
Shell/Bash
8 votes184 views1 answer
Check gpu free memory linux
Shell/Bash
26 votes223 views2 answers
Delete git repository command line
Shell/Bash
5 votes213 views2 answers
Install adonis cli
Shell/Bash
0 vote179 views1 answer
Relaunch doc macos
Shell/Bash
0 vote186 views1 answer
Uninstall space vim
Shell/Bash
1 vote176 views1 answer
Create maven project
Shell/Bash
0 vote209 views1 answer
Uninstall gns3 ubuntu
Shell/Bash
2 votes200 views2 answers
Vim replace with new line
Shell/Bash