Truss is a command that enables you to trace a unix program. The truss output will show the libraries, executables, log files etc the command is touching including the return code.
Use the following commands -
truss -ae -o truss.txt -p 123456
truss -f -o truss.txt abc
where
truss.txt is the output file.
123456 is the process id that the truss will run on.
abc is the program that truss will run on.
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