Display I/O and transfer rate statistics using sar command 5. sar command to display memory utilization statistics 4.

sar command to report CPU utilization for each N seconds 3. System activity reports can be generated from a logfile by using the atopsar command. Display CPU utilization statistics with sar command 2. By default, the daily logfiles are preserved for 28 days. Use the cat command to display the data held in /proc/cpuinfo. You can then import this data for analysis, using either a spreadsheet program or a custom tool like sargraph.Īn alternative is to use atop which is able to store raw counters in a file for long-term analysis on system level and process level.

Sysstat will collect background CPU usage data every minute, saving it to /var/log/sysstat/. You can generate a real-time report with the following command: sar -u 1 3 Running the mpstat command on a Linux system will display an output like the one shown in figure 2. You can modify this behavior by editing the sysstat crontab at /etc/cron.d/sysstat, or by changing rotation settings in the sysstat settings at /etc/sysstat/sysstat. The mpstat command provides information about CPU performance and utilization by giving CPU statistics for the whole system and each available processor. Furthermore, the sar command can be found in the sysstat package. During the previous reboot, vmstat displayed average details. You can see the state of a system, its memory, I/O, and CPU by using this feature. Next, enable it by editing /etc/default/sysstat and setting “ENABLED” to true.ĭoing so monitors your system and generates a report every 10 minutes, rotating them out after a week. To check the amount of CPU usage, the vmstat command is used in Linux.

Command to check cpu usage in linux