Configure SSH
$ yum install openssh-server openssl
$ cp /etc/ssh/sshd_config /etc/ssh/sshd_config.bak
$ vim /etc/ssh/sshd_config
Comment out the following line Subsystem SFTP/usr/libexec/openssh/SFTP server. –
Add the following lines at the end:
Subsystem sftp internal-sftp
Match Group sftp
ChrootDirectory /nsh/sftp/%u
ForceCommand internal-sftp
AllowTcpForwarding no
X11Forwarding no
Starting the SSH Service
$ systemctl start sshd
Create users and groups
$ mkdir -p /nsh/sftp/
$ groupadd sftp
$ useradd -m -d /nsh/sftp/nsh -g sftp -s /sbin/nologin nsh
$ passwd nsh
$ chmod -R 755 /nsh/sftp/
$ chown root:sftp /nsh/sftp/
$ chown root:sftp /nsh/sftp/nsh