tldr/pages/linux/strace.md

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# strace
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> Troubleshooting tool for tracing system calls.
> More information: <https://manned.org/strace>.
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- Start tracing a specific [p]rocess by its PID:
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`strace -p {{pid}}`
- Trace a [p]rocess and filt[e]r output by system call:
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`strace -p {{pid}} -e {{system_call,system_call2,...}}`
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- Count time, calls, and errors for each system call and report a summary on program exit:
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`strace -p {{pid}} -c`
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- Show the [T]ime spent in every system call:
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`strace -p {{pid}} -T`
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- Start tracing a program by executing it:
`strace {{program}}`
- Start tracing file operations of a program:
`strace -e trace=file {{program}}`
- Start tracing network operations of a program as well as all its [f]orked and child processes, saving the [o]utput to a file:
`strace -f -e trace=network -o {{trace.txt}} {{program}}`