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

5 votes255 views1 answer
Snap store android studio
Shell/Bash
0 vote279 views1 answer
Powershell read a list of names frmo a file and red in FOR loop
Shell/Bash
0 vote281 views1 answer
Conda install libglu1
Shell/Bash
2 votes271 views1 answer
Install flask on ubuntu
Shell/Bash
0 vote286 views1 answer
Linux blackeye
Shell/Bash
3 votes283 views3 answers
How to shutdown linux from terminal immediately
Shell/Bash
0 vote256 views1 answer
Linux ssh access by ip
Shell/Bash
0 vote282 views1 answer
Rm: cannot remove
Shell/Bash
0 vote294 views1 answer
Delete git config all remote url
Shell/Bash
0 vote286 views1 answer
Kubernetes auto complete
Shell/Bash