How to use SCP to transmit without asking?

Installing and Using OpenWrt
1

When using SCP to transfer files in linux, there will always be "192.168.1.1 is not in the trusted hosts file."
How to avoid this problem when using command?
I don't want to install other programs to proceed, I hope it can be presented through scp.

thanks!

2

The question should only be asked once.

And it's a scp client side 'issue', not openwrt.

1 Like
3

When you connect the first time the host fingerprint would be stored in .ssh/known_hosts if that is not happening you need to check the client.

2 Likes
4

Can't it be like "ssh -y" ? -- don't perform any remote host key checking

5

Googled/Tried man scp ?

2 Likes
6

yes, I tried scp -o StrictHostKeyChecking=no and other options, but it didn't work
it only work from windows.

7

I use ssh-keyscan to fetch the public key. I have the following commands in a setup script I use:

ssh-keyscan -H $host,$ip4 >> ~/.ssh/known_hosts
ssh-keyscan -H $host >> ~/.ssh/known_hosts
ssh-keyscan -H $ip4 >> ~/.ssh/known_hosts

Refer to the man page. I'm including the security section below:

Security: If an ssh_known_hosts file is constructed using ssh-keyscan without verifying the keys, users will be vulnerable to man in the middle attacks. On the other hand, if the security model allows such a risk, ssh-keyscan can help in the detection of tampered keyfiles or man in the middle attacks which have begun after the ssh_known_hosts file was created.

5 Likes
8

Just leaving this here for archival purposes.

My scp command in rc.local was also failing with the same error. Adding export HOME=/root before the command solved it.

9

bumped my head on this for a long time. hopefully others find it sooner.

10

me too. This is way better than using the "-y" parameter.