To install sysstat/sar on CentOS, run yum install sysstat Enable and start sysstat systemctl enable sysstat systemctl start sysstat systemctl status sysstat Allow several minutes to collect data, then you will be able to see stats with sar ommand. See sar
On Ubuntu, when i run sar, i get error root@localhost:~# sar Cannot open /var/log/sysstat/sa31: No such file or directory Please check if data collecting is enabled root@localhost:~# This is because sysstat is not enabled by default on Ubuntu, to enable, edit file vi /etc/default/sysstat Find ENABLED=”false” Replace with ENABLED=”true” Now restart sysstat systemctl restart sysstat … Read more