Install sar error Please check if data collecting is enabled
1. Install sysstat
apt-get install sysstat
2. Check sar error
Cannot open /var/log/sysstat/sa02: No such file or directory
Please check if data collecting is enabled in /etc/default/sysstat
3 Change config file /etc/default/sysstat
Change False to True in /etc/default/sysstat
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# Should sadc collect system activity informations? Valid values
# are "true" and "false". Please do not put other values, they
# will be overwritten by debconf!
ENABLED="true"
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4. Reboot sysstat Service
service sysstat restart
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