
sysstat: No such file or directory
Problem
When you run sysstat you might get the error
Cannot open /var/log/sysstat/sa20: No such file or directory
This is because sar logging is not enabled on the server yet.
Solution
Enable logging by running the following command
dpkg-reconfigure sysstat
Select <Yes> and press return.
Manual Method
If this does not work change the config file manually
edit the file
vi /etc/default/sysstat
alter the line ENABLED from false to true
ENABLED="false"
ENABLED="true"
Restart sysstat
/etc/init.d/sysstat restart
Wait 10 minutes and try the command again and you will now get an output
[[email protected] ~]$ sar Linux 2.6.26-2-686-bigmem (server.workgroup) 05/02/13 _i686_ 00:00:01 CPU %user %nice %system %iowait %steal %idle 00:05:00 all 0.96 0.08 0.56 0.08 0.00 98.32 00:10:01 all 0.95 0.02 0.42 0.01 0.00 98.61 00:15:00 all 1.00 0.00 0.39 0.00 0.00 98.61 00:20:01 all 0.94 0.00 0.38 0.00 0.00 98.68 00:25:00 all 0.93 0.00 0.43 0.00 0.00 98.64 00:30:00 all 0.96 0.00 0.43 0.00 0.00 98.61 00:35:01 all 0.95 0.00 0.39 0.00 0.00 98.65