How to append multiple data to a file?

Question

I have a file called updatelog where I would like to be adding new updates to it

I tried:

date; message >> updatelog.txt
date + message >> updatelog.txt
date & message >> updatelog.txt
date | message >> updatelog.txt
date && message >> updatelog.txt

But nothing seems to work, what I'm doing wrong?

Answer 1

这种方法怎么样？

date >> updatelog.txt && echo "A sample message" >> updatelog.txt