How to enable systat logging on an Ubuntu server

Introduction

Sometimes sysstat will be installed, but not collecting data. Running the sar command will show output similar to the following.

[root@server ~]cPs# sar
Cannot open /var/log/sysstat/sa20: No such file or directory
Please check if data collecting is enabled
[root@server ~]cPs#

Procedure

1. Access the server's command line as the 'root' user via SSH or "Terminal" in WHM.
2. Open the /etc/default/sysstat file in your preferred text editor.
3. Change the value of the ENABLED line to "true".

   ENABLED="true"

4. Save the changes and exit the text editor.
5. Restart the sysstat service.

   systemctl restart sysstat.service