Strace forked subprocess

How to attach strace to a forked process

Run this to see the forked process

strace -f ruby -e 'fork' 2>&1 | egrep -A1 '^(fork|clone)'

strace -f ruby -e 'syscall 57' 2>&1 | egrep -A1 '^(fork|clone)'

Run this to log debug of forked process in to log.txt

strace -f ruby -e 'fork' >log.txt 2>&1

strace -f ruby -e 'syscall 57' >log.txt 2>&1

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