2>&1 和 2>>&1 有区别吗？

Question

Is there difference in 2>&1 and 2>>&1 in Linux?

I know about > and >>. Also know about 1,2,3 mean standard output/error/input.

Answer 1

I got a syntax error in bash.

$ echo hello 2>>&1
-bash: syntax error near unexpected token `&'`

>> only works with a real file path

$ echo hello 1>>/tmp/xx