tldr/pages/linux/strace.md

strace

Troubleshooting tool for tracing system calls.

• Start tracing a specific process by its PID:

strace -p {{pid}}

• Trace a process and filter output by system call:

strace -p {{pid}} -e {{system_call_name}}

• Count time, calls, and errors for each system call and report a summary on program exit:

strace -p {{pid}} -c

• Show the time spent in every system call:

strace -p {{pid}} -T

• Start tracing a program by executing it:

strace {{program}}

• Start tracing file operations of a program:

strace -e trace=file {{program}}