tail
命令可用于查看文件的内容,通常用来查看日志,加上-f
参数就可以查看最新的日志并且不断刷新。
tail [参数] [文件]
参数-f 循环读取-q 不显示处理信息-v 显示详细的处理信息-c<数目> 显示的字节数-n<行数> 显示文件的尾部 n 行内容--pID=PID 与-f合用,表示在进程ID,PID死掉之后结束-q,--quIEt,--silent 从不输出给出文件名的首部-s,--sleep-interval=S 与-f合用,表示在每次反复的间隔休眠S秒例子实时查看jenkins
的日志
# tail -f /var/log/jenkins/jenkins.log2020-06-08 00:34:16.777+0000 [ID=27] INFO o.s.c.s.AbstractApplicationContext#obtainFreshbeanfactory: Bean factory for application context [org.springframework.web.context.support.StaticWebApplicationContext@67401a8e]: org.springframework.beans.factory.support.Defaultlistablebeanfactory@4eb5cf662020-06-08 00:34:16.779+0000 [ID=27] INFO o.s.b.f.s.Defaultlistablebeanfactory#preInstantiateSingletons: Pre-instantiating singletons in org.springframework.beans.factory.support.Defaultlistablebeanfactory@4eb5cf66: defining beans [filter,legacy]; root of factory hIErarchy2020-06-08 00:34:17.027+0000 [ID=27] INFO jenkins.InitReactorRunner#onAttained: Completed initialization2020-06-08 00:34:17.111+0000 [ID=20] INFO hudson.WebAppMain#run: Jenkins is fully up and running2020-06-08 00:34:51.566+0000 [ID=41] INFO h.m.DownloadService$Downloadable#load: Obtained the updated data file for hudson.tasks.Maven.MavenInstaller2020-06-08 00:34:52.639+0000 [ID=41] INFO h.m.DownloadService$Downloadable#load: Obtained the updated data file for hudson.plugins.gradle.GradleInstaller2020-06-08 00:34:53.453+0000 [ID=41] INFO h.m.DownloadService$Downloadable#load: Obtained the updated data file for hudson.tasks.Ant.AntInstaller2020-06-08 00:34:55.783+0000 [ID=41] INFO h.m.DownloadService$Downloadable#load: Obtained the updated data file for hudson.tools.JDKInstaller2020-06-08 00:34:55.783+0000 [ID=41] INFO hudson.util.RetrIEr#start: Performed the action check updates server successfully at the attempt #12020-06-08 00:34:55.787+0000 [ID=41] INFO hudson.model.AsyncPeriodicWork#lambda$doRun: Finished Download Metadata. 42,704 ms
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