1、核心命令
linux 监控网络IO、磁盘、CPU、内存:
CPU:vmstat 、sar –u、top
磁盘IO:iostat –xd、sar –d、top
网络IO:iftop -n、ifstat、dstat –nt、sar -n DEV 2 3
磁盘容量:df –h
内存使用:free –m、top
2、常用命令
(1)内存:条数、每条大小、内存是DDR4还是DDR3、内存频率是2666MT/S还是1600MT/s
条数: dmidecode|grep -A5 ‘Memory Device’|grep Size | grep -v Installed |wc -l
每条大小: dmidecode|grep -A5 ‘Memory Device’|grep Size | grep -v Installed |uniq
内存类型: dmidecode | grep -A16 “Memory Device” | grep ‘Type:’ |grep -v Unknown |uniq
内存频率: dmidecode | grep -A16 “Memory Device” | grep ‘Speed’ |grep -v Unknown |uniq
(2)硬盘:块数,大小
fdisk -l | grep “Disk /dev/sd”
(3)查看什么进程占用端口
netstat -antp | fgrep
(4)查看进程资源
jps -l # 获取进程id
jmap -heap 21046
(5)CPU个数
cat /proc/cpuinfo| grep “physical id”| sort| uniq| wc -l
(6)CPU核数
cat /proc/cpuinfo| grep “cpu cores”| uniq
(7)CPU主频
cat /proc/cpuinfo| grep “model name”| uniq