Redirect stdout and stderr to a file
stdout
kwannoel@Kwans-MacBook-Pro uprooted % cat 1.in | ./uprooted 1> temp
stderr
kwannoel@Kwans-MacBook-Pro uprooted % cat 1.in | ./uprooted 1> temp
Filter stderr / stdout
remove stdout
kwannoel@Kwans-MacBook-Pro uprooted % cat 2.in | ./uprooted 1> /dev/null
remove stderr
kwannoel@Kwans-MacBook-Pro uprooted % cat 2.in | ./uprooted 2> /dev/null
2>&1