Linux

h3. Linux SAR (System Activity Reports)

h5. Install SAR

<pre>

$ sudo apt install sysstat

</pre>

h5. Start and enable the service

<pre>

$ sudo systemctl enable sysstat && sudo systemctl start sysstat

</pre>

h5. Verify

<pre>

$ sudo systemctl status sysstat

</pre>

h5. Enable SAR

<pre>

$ sudo sed -i 's/false/true/g' /etc/default/sysstat

$ sudo systemctl restart sysstat

</pre>

h5. Generate SAR Chart

<pre>

sar -A -f /var/log/sysstat/sa01 > /tmp/sa01_$(hostname).txt

</pre>

h5. Example

CPU usage (2-second) for 5 times

<pre>

$ sar -u 2 5

$ sar -P All 2 5

</pre>

Memory usage (1-second) for 10 times

<pre>

$ sar -r 1 10

</pre>

Filesystem usage (1-second) for 5 times

<pre>

$ sar -F 1 5

</pre>