Re: sudo question

[eben]

On 11/20/24 17:49, Greg Wooledge wrote:

On Thu, Nov 21, 2024 at 06:17:31 +0800, Bitfox wrote:

sudo echo "something" >>/etc/postfix/virtual_alias_maps

https://mywiki.wooledge.org/BashPitfalls#pf53

Can you help me why the first sudo failed?

The redirection >> is being done before sudo is executed.

Something like
sudo sh -c 'echo "something" >>/etc/postfix/virtual_alias_maps'
should work.