Enable sar in Ubuntu

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

This is because sysstat is not enabled by default on Ubuntu, to enable, edit file

vi /etc/default/sysstat



Replace with


Now restart sysstat

systemctl restart sysstat

See sar

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