strace - is a CLI tool for debugging and troubleshooting programs

To trace of all system calls made command free -h $ strace free -h $ strace df -Th

To Trace Linux Process PID $ sudo strace -p <PID>

To get summary of linux process $ sudo strace -c -p <PID>

To Print Instruction Pointer During System Call $ sudo strace -i df -Th $ sudo strace -i free -h

To show Time of Day For Each Trace Output Line $ sudo strace -t df -Th $ sudo strace -t free -h

To Print Command Time Spent in System Calls $ sudo strace -T df -Th $ sudo strace -T free -h

To trace Only Specific System Calls $ sudo strace -e trace=write df -Th $ sudo strace -e trace=write free -h $ sudo strace -e trace=all df -Th $ sudo strace -e trace=all free -h

To trace System Calls Based on a Certain Condition To trace all system calls involving process management $ sudo strace -q -e trace=process df -Th $ sudo strace -q -e trace=process free -h

To trace all system calls that take a filename as an argument, $ sudo strace -q -e trace=file df -Th $ sudo strace -q -e trace=file free -h

To trace all system calls involving memory mapping $ sudo strace -q -e trace=memory df -Th $ sudo strace -q -e trace=memory free -h

To redirect Trace Output to File $ sudo strace -o df_debug.txt df -Th $ sudo strace -o free_debug.txt free -h

To show debugging information for strace $ strace -d df -Th $ strace -d free -h

regards, T.Dhanasekar