scalable attributes
beforeSave vs afterSave
crontab
grep
grep -rn '"' *
grep -rn '\\' *
grep -rn "\\" * luocy@bj-zdev02
grep: Trailing backslash
should be
grep -rn "\\\\" *
replace string in multiple files
sed -i "s/oldString/newString/g" `grep oldString -rl *`