Ubuntu SFTP Server Permissions

Question

I'm trying to create a SFTP server using Ubuntu Server 24.04 LTS, and I'm having trouble copying to the folder I created:

• The sshd_config sets ChRootDirectory to \sftpsrv, which is a mounted disk specifically for SFTP files
• I am not able to create a folder inside \sftpsrv or assign permissions to a user and send files to that folder; my goal is to have something like:

  \sftpsrv\linux
  \sftpsrv\windows
  \sftpsrv\firewall
  

• I want only one user, so to copy files to these folders I could use something like this, but after trying the first part, as soon as I try to copy the file, I get permission denied:

  copy sftp://{user}:{password}@{IP}/linux/{filename}
  

  
  

Can anyone help me solve this?

Root is the owner of /sftpsrv and sftpuser is the owner of the others folders.

Answer 1

The answer was create a new user, change permission of subfolders to that user and the specific group and it's working now!