Report elapsed user and system time for a command.
Section: Performance Monitoring and Troubleshooting
Measure command runtime
bash
bash
time rsync -av src/ backup/Explanation
Useful for baseline timing and quick performance comparison.
Learn the surrounding workflow
Compare similar commands or jump into common fixes when this command is part of a bigger troubleshooting path.
Related commands
Same sheet · prioritizing Performance Monitoring and Troubleshooting
Show how the shell resolves a command
Reveal whether a name is an alias, builtin, function, or file.
Build command lines from stdin
Pass stdin items as arguments to another command.