if [[ -s "/usr/local/rvm/environments/ree-1.8.7-2010.02" ]] ; then
source "/usr/local/rvm/environments/ree-1.8.7-2010.02"
exec ruby "$@"
else
echo "ERROR: Missing RVM environment file: '/usr/local/rvm/environments/ree-1.8.7-2010.02'" >&2
exit 1
fi
“ ” 起什么-s
作用?
那么“ ”在做什么>&2
?