strace

Ubuntu: Using strace to get a view into file and network activity of a process

strace is a handy utility for tracing system, file, and network calls on a Linux system.  It can produce trace output for either an already running process, or it can create a new process. Some of the most common troubleshooting scenarios are needing to isolate either the network or file system activity of a process.  Ubuntu: Using strace to get a view into file and network activity of a process