Linux Performance Commands

for virtual memory and CPU
vmstat for IO and CPU utilization
iostat for network
netstat
參考來源：
1.https://blogs.oracle.com/openomics/system-performance-issues-check-the-io
2.https://geekflare.com/linux-performance-commands/

disk io test

磁碟測速工具 hdparm 讀取測試

#sudo hdparm -tT /dev/sda1

dd 寫入測試 (用 dd 指令寫檔到 /tmp 目錄測試)

#dd if=/dev/zero of=/tmp/bench bs=1M count=1024 && rm /tmp/bench

參考來源：https://blog.toright.com/posts/5051/linux-disk-io-%E6%95%88%E8%83%BD%E6%B8%AC%E8%A9%A6.html