The strace command in Linux lets you trace system calls and signals. Or in other words: it allows you to see what a program or process is doing.
Following is its syntax:
In the simplest case, strace runs the specified command until it exits. It intercepts and records the system calls which are called by a process and the signals which are received by a process. The name of each system call, its arguments and its return value are printed on standard error or to the file specified with the -o option. For example:strace [OPTIONS] command
If a process is already running, you can trace it by simply passing its PID as follows; this will fill your screen with continued output that shows system calls being made by the process. To end it, press [Ctrl + C].# strace ls
# strace -p 3569
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Interested in learning more?
Interested in learning more?
