使用`date +%y%m%d`
`date +%Y%m%d_%H%M%S`
echo test > /opt/test`date +%y%m%d`.txt

echo nihao >/opt/test`date +%Y%m%d_%H%M%S`.log
使用`date +%y%m%d`
`date +%Y%m%d_%H%M%S`
echo test > /opt/test`date +%y%m%d`.txt
echo nihao >/opt/test`date +%Y%m%d_%H%M%S`.log