In sftp, how to set the default permission for all files in a folder?

In sftp, how to set the default permission for all files in a folder?


 For centos  put two consecutive lines at the end of /etc/ssh/sshd_config
 
  
 
Match Group www-data 
 
ForceCommand internal-sftp -u 2
 
this will setup umask and files will be 644

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