1分钟系列，希望大家有所收获。如何查看占用CPU最多的进程？方法一：核心命令：ps实际命令：psH-eopid,pcpu|sort-nk2|tail执行效果如下：[work@test01~]$psH-eopid,pcpu|sort-nk2|tail313960.6313960.6313960.6313960.6313960.6313960.6313960.6313960.6309041.0309141.0结果：你看，pid=30914占用的CPU最多。画外音：其实是31396方法二：核心命令：top实际命令：topShift+t找到最耗CPU的进程ID。对应的服务名是什么？方法一：核心命令：ps实际命令：psaux|fgreppid执行效果如下：[work@test01~]$psaux|fgrep30914work309141.00.830956871668?SlFeb02124:44./router2–conf=rs.conf结果：你看，进程为./router2方法二：直接查看进程即可。实际命令：ll/proc/pid执行效果如下：[work@test01~]$ll/proc/30914lrwxrwxrwx1workwork0Feb1013:27cwd->/home/work/im-env/router2lrwxrwxrwx1workwork0Feb1013:27exe->/home/work/im-env/router2/router2画外音：这个好，全路径出来了。如何查看某个端口的连接状态？方法一：核心命令：netstat实际命令：netstat-lap|fgrepport执行效果如下：[work@test01~]$netstat-lap|fgrep22022tcp0010.58.xxx.29:22022*:*LISTEN31396/imuitcp0010.58.xxx.29:2202210.58.xxx.29:46642ESTABLISHED31396/imuitcp0010.58.xxx.29:2202210.58.xxx.29:46640ESTABLISHED31396/imui方法二：核心命令：lsolsofi实际命令端口执行~结果如下：[work@test01$/usr/sbin/lsof-i:22022COMMANDPIDUSERFDTYPEDEVICESIZENODENAMErouter30904work50uIPv469065770TCP10.58.xxx.29:46638->10.58.xxx.29:22022(ESTABLISHED)router30904work51uIPv469065772TCP10.58.xxx.29:46639->10.58.xxx.29:22022(ESTABLISHED)router30904work52uIPv469065774TCP10.58.xxx.29:46640->10.58.xxx.29:22022(ESTABLISHED)希望这1分钟对您排查线上问题有所帮助。
