tail -f 查看日志筛选并实时显示

tail -f <span style="font-family: Arial, Helvetica, sans-serif;">file</span><span style="font-family: Arial, Helvetica, sans-serif;">|grep xxx</span>

tail -f file|grep --line-buffered xxx

tail -f alert-server/logs/catalina.out |grep  --line-buffered UPYOO_TOKEN

refer:

问题请教：使用tail -f|grep 筛选日志带来的显示延迟问题-Linux系统管理-ChinaUnix.net
http://bbs.chinaunix.net/thread-4147378-1-1.html