Read today's CPU utilization history
Build a paste-ready command, then review its compatibility and effects before running it.
read-onlyno known side effects Compatibility
LinuxVerified for Linux using posix, bash, zsh syntax.
Operational knowledgereview due 2027-01-20
Requirementssarsar must be installed and available on PATH.
Version supportsar Current supported releasesVerified for linux using posix, bash, zsh syntax; consult compatibility notes for platform-specific differences.
Expected signals12:00:01 AM CPU %user %nice %system %iowait %steal %idleRepresentative successful output; values vary with the selected target and system state.
Known errorssar: command not foundsar is missing or is not available on PATH.
Verifysar -uThe output matches the expected target and exits without an error.Rollback noteNot required: this command is read-only and does not change system state.
Command breakdown
01sarCommandRuns the sar stage of this one-liner.
02-uOptionConfigures sar with the -u option.
Example output
12:00:01 AM CPU %user %nice %system %iowait %steal %idle
12:10:01 AM all 3.20 0.00 1.10 0.20 0.00 95.50
Illustrative output — exact values vary by system and data.
Official sources