Once configured the cage in the file sshd_config
Subsystem sftp internal-sftp
Match Group sftponly
ChrootDirectory %h
AllowTcpForwarding no
ForceCommand internal-sftp

and
home/user root:root rwx r-x r-x
home/user root:root rwx r-x r-x
home/user/input user:sftponly rwx r-x r-x

passwd
user:x:502:501:user:/home/onosftp:/sbin/nologin
group
sftponly:x:501:user

sftp user@xxx.xxx.xxx

sftp>ls
Couldn't get handle: Permission denied
sftp>

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