bash 中的“>”和“&>”有什么区别？

Question

In bash we have 3 stream types:

• 0 (STDIN)
• 1 (STDOUT)
• 2 (STDERR)

So, while executing some program i can use these streams (eg i can redirect them from console to a file or smth like /dev/null, etc):

# only errors from STDERR will be shown, STDOUT will be moved to /dev/null
command > /dev/null
# only STDOUT will be shown, STDERR will be moved to /dev/null
command 2> /dev/null

I saw that some people write command &> /dev/null

What is the difference between > and &> in bash?

Answer 1

what is the difference between ">" and "&>" in bash?

It's a bashism that redirects both stdout and stderr . It can also be achieved with the more portable:

command > file 2>&1