Shellscript监视日志文件(如果关键字触发然后执行命令)? [英] Shellscript to monitor a log file if keyword triggers then execute a command?

问题描述

是否有一种便宜的方法来监视类似tail -f log.txt的日志文件，然后如果出现类似[error]的东西，执行命令?

Is there a cheap way to monitor a log file like tail -f log.txt, then if something like [error] appears, execute a command?

谢谢.

推荐答案

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

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