Install sar error: Please check if data collecting is enabled
1、安装sysstat
apt-get install sysstat
2、安装后提示
Cannot open /var/log/sysstat/sa02: No such file or directory
Please check if data collecting is enabled in /etc/default/sysstat
3、修改配置文件：/etc/default/sysstat
将False改为True
----
# 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、重启sysstat服务即可
service sysstat restart
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