nmon 是一个资源监控工具，能够监控 Linux 系统资源（ cpu，memory，network，disks ）的使用情况，常见用法如下：
[root@localhost ~]$ yum install -y nmon
[root@localhost ~]$ nmon +nmon-16g------[H for help]---Hostname=localhost----Refresh= 2secs ---17:14.17--------------------------------------------------------------------------------------------------------------+ | | | ------------------------------ | | _ __ _ __ ___ ___ _ __ For help type H or ... | | | '_ | '_ ` _ / _ | '_ nmon -? - hint | | | | | | | | | | | (_) | | | | nmon -h - full details | | |_| |_|_| |_| |_|___/|_| |_| | | To stop nmon type q to Quit | | ------------------------------ | | | | CentOS release 6.5 (Final) CentOS release 6.5 (Final) | | Vendor=GenuineIntel Model=Intel(R) Core(TM) i5-6500 CPU @ 3.20GHz | | MHz=3201.000 bogomips=6402.00 lscpu:CPU=4 Little Endian | | ProcessorChips=1 PhyscalCores=2 Sockets=2 Cores=2 Thrds=1 | | VirtualCPUs =4 MHz=3201 max=0 min=0 | | | | Use these keys to toggle statistics on/off: | | c = CPU l = CPU Long-term - = Faster screen updates | | C = " WideView U = Utilisation + = Slower screen updates | | m = Memory V = Virtual memory j = File Systems | | d = Disks n = Network . = only busy disks/procs | | r = Resource N = NFS h = more options | | k = Kernel t = Top-processes q = Quit |
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