Trackfs is a small program that tracks file system changes -- creation, update and removal of fs objects -- of another program (or group of programs). It is similar to `installwatch', but works quite differently: While installwatch uses LD_PRELOAD to intercept library functions like open() and unlink(), trackfs runs the child program(s) with tracing enabled and tracks the system calls they make. trackfs also includes "playback", which runs a program via trackfs and creates a shell script which, when run, will reverse all filesystem changes made by the program.