Mastering Linux Security and Hardening - Second Edition

Creating a group and configuring the sshd_config file

With the exception of the slight difference in user-creation commands, this procedure works the any one of your VMs when we get to the hands-on lab.

We'll begin by creating an sftpusers group:

sudo groupadd sftpusers

Create the user accounts and add them to the sftpusers group. We'll do both operations in one step. On your CentOS machine, the command for creating Max's account would be as follows:

sudo useradd -G sftpusers max

 On your Ubuntu machine, it would be as follows:

sudo useradd -m -d /home/max -s /bin/bash -G sftpusers max

Open the /etc/ssh/sshd_config file in your favorite text editor. Find the line that says the following:

Subsystem sftp /usr/lib/openssh/sftp-server

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