大文件尾随grep产生不正确的结果，见下面的certificate。 该文件是1.2GB大，但grep应该处理它作为一个stream，所以哪里可能是一个问题？
root@condor1796 /home/glassfish/apache-tomcat-8.5.5/logs # tail -n 20000 catalina.out | grep "Deploy" 10-Jan-2017 02:26:48.011 INFO [www.numbeo.com-startStop-2] org.apache.catalina.startup.HostConfig.deployWAR Deploying web application archive /home/glassfish/apache-tomcat-8.5.5/appBaseLivingCost/ROOT.war 10-Jan-2017 02:26:49.850 INFO [www.numbeo.com-startStop-2] org.apache.catalina.startup.HostConfig.deployWAR Deployment of web application archive /home/glassfish/apache-tomcat-8.5.5/appBaseLivingCost/ROOT.war has finished in 1,839 ms 10-Jan-2017 02:28:56.096 INFO [www.numbeo.com-startStop-1] org.apache.catalina.startup.HostConfig.deployWAR Deploying web application archive /home/glassfish/apache-tomcat-8.5.5/appBaseLivingCost/ROOT.war 10-Jan-2017 02:28:56.718 INFO [www.numbeo.com-startStop-1] org.apache.catalina.startup.HostConfig.deployWAR Deployment of web application archive /home/glassfish/apache-tomcat-8.5.5/appBaseLivingCost/ROOT.war has finished in 622 ms 10-Jan-2017 02:28:56.719 INFO [numbeo.com-startStop-1] org.apache.catalina.startup.HostConfig.deployWAR Deploying web application archive /home/glassfish/apache-tomcat-8.5.5/appBaseNonWwwNumbeo/ROOT.war 10-Jan-2017 02:28:56.823 INFO [numbeo.com-startStop-1] org.apache.catalina.startup.HostConfig.deployWAR Deployment of web application archive /home/glassfish/apache-tomcat-8.5.5/appBaseNonWwwNumbeo/ROOT.war has finished in 104 ms 10-Jan-2017 02:28:56.868 INFO [intl.numbeo.com-startStop-1] org.apache.catalina.startup.HostConfig.deployWAR Deploying web application archive /home/glassfish/apache-tomcat-8.5.5/appBaseAcmeOnly/ROOT.war 10-Jan-2017 02:28:56.909 INFO [intl.numbeo.com-startStop-1] org.apache.catalina.startup.HostConfig.deployWAR Deployment of web application archive /home/glassfish/apache-tomcat-8.5.5/appBaseAcmeOnly/ROOT.war has finished in 41 ms 10-Jan-2017 02:28:56.910 INFO [numbeo.com-startStop-1] org.apache.catalina.startup.HostConfig.deployWAR Deploying web application archive /home/glassfish/apache-tomcat-8.5.5/appBaseNonWwwNumbeo/ROOT.war 10-Jan-2017 02:28:56.979 INFO [numbeo.com-startStop-1] org.apache.catalina.startup.HostConfig.deployWAR Deployment of web application archive /home/glassfish/apache-tomcat-8.5.5/appBaseNonWwwNumbeo/ROOT.war has finished in 68 ms root@condor1796 /home/glassfish/apache-tomcat-8.5.5/logs # grep "Deploy" ~glassfish/apache-tomcat-8.5.5/logs/catalina.out | tail -n 6 21-Dec-2016 04:40:24.964 INFO [numbeo.com-startStop-1] org.apache.catalina.startup.HostConfig.deployWAR Deployment of web application archive /home/glassfish/apache-tomcat-8.5.5/appBaseNonWwwNumbeo/ROOT.war has finished in 110 ms 21-Dec-2016 04:40:25.001 INFO [intl.numbeo.com-startStop-1] org.apache.catalina.startup.HostConfig.deployWAR Deploying web application archive /home/glassfish/apache-tomcat-8.5.5/appBaseAcmeOnly/ROOT.war 21-Dec-2016 04:40:25.096 INFO [intl.numbeo.com-startStop-1] org.apache.catalina.startup.HostConfig.deployWAR Deployment of web application archive /home/glassfish/apache-tomcat-8.5.5/appBaseAcmeOnly/ROOT.war has finished in 95 ms 21-Dec-2016 04:40:25.098 INFO [numbeo.com-startStop-1] org.apache.catalina.startup.HostConfig.deployWAR Deploying web application archive /home/glassfish/apache-tomcat-8.5.5/appBaseNonWwwNumbeo/ROOT.war 21-Dec-2016 04:40:25.210 INFO [numbeo.com-startStop-1] org.apache.catalina.startup.HostConfig.deployWAR Deployment of web application archive /home/glassfish/apache-tomcat-8.5.5/appBaseNonWwwNumbeo/ROOT.war has finished in 112 ms Binary file /home/glassfish/apache-tomcat-8.5.5/logs/catalina.out matches root@condor1796 /home/glassfish/apache-tomcat-8.5.5/logs #