--- /dev/null
+
+# This is the sshd server system-wide configuration file. See
+# sshd_config(5) for more information.
+
+# This sshd was compiled with PATH=/usr/local/bin:/usr/bin:/bin:/usr/games
+
+# The strategy used for options in the default sshd_config shipped with
+# OpenSSH is to specify options with their default value where
+# possible, but leave them commented. Uncommented options override the
+# default value.
+
+Include /etc/ssh/sshd_config.d/*.conf
+
+#Port 22
+#AddressFamily any
+#ListenAddress 0.0.0.0
+#ListenAddress ::
+
+#HostKey /etc/ssh/ssh_host_rsa_key
+#HostKey /etc/ssh/ssh_host_ecdsa_key
+#HostKey /etc/ssh/ssh_host_ed25519_key
+
+# Ciphers and keying
+#RekeyLimit default none
+
+# Logging
+#SyslogFacility AUTH
+#LogLevel INFO
+
+# Authentication:
+
+#LoginGraceTime 2m
+PermitRootLogin no
+#StrictModes yes
+#MaxAuthTries 6
+#MaxSessions 10
+
+#PubkeyAuthentication yes
+
+# Expect .ssh/authorized_keys2 to be disregarded by default in future.
+#AuthorizedKeysFile .ssh/authorized_keys .ssh/authorized_keys2
+
+#AuthorizedPrincipalsFile none
+
+#AuthorizedKeysCommand none
+#AuthorizedKeysCommandUser nobody
+
+# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
+#HostbasedAuthentication no
+# Change to yes if you don't trust ~/.ssh/known_hosts for
+# HostbasedAuthentication
+#IgnoreUserKnownHosts no
+# Don't read the user's ~/.rhosts and ~/.shosts files
+#IgnoreRhosts yes
+
+# To disable tunneled clear text passwords, change to no here!
+PasswordAuthentication no
+#PermitEmptyPasswords no
+
+# Change to yes to enable challenge-response passwords (beware issues with
+# some PAM modules and threads)
+KbdInteractiveAuthentication no
+
+# Kerberos options
+#KerberosAuthentication no
+#KerberosOrLocalPasswd yes
+#KerberosTicketCleanup yes
+#KerberosGetAFSToken no
+
+# GSSAPI options
+#GSSAPIAuthentication no
+#GSSAPICleanupCredentials yes
+#GSSAPIStrictAcceptorCheck yes
+#GSSAPIKeyExchange no
+
+# Set this to 'yes' to enable PAM authentication, account processing,
+# and session processing. If this is enabled, PAM authentication will
+# be allowed through the KbdInteractiveAuthentication and
+# PasswordAuthentication. Depending on your PAM configuration,
+# PAM authentication via KbdInteractiveAuthentication may bypass
+# the setting of "PermitRootLogin prohibit-password".
+# If you just want the PAM account and session checks to run without
+# PAM authentication, then enable this but set PasswordAuthentication
+# and KbdInteractiveAuthentication to 'no'.
+UsePAM yes
+
+#AllowAgentForwarding yes
+#AllowTcpForwarding yes
+#GatewayPorts no
+X11Forwarding yes
+#X11DisplayOffset 10
+#X11UseLocalhost yes
+#PermitTTY yes
+PrintMotd no
+#PrintLastLog yes
+#TCPKeepAlive yes
+#PermitUserEnvironment no
+#Compression delayed
+ClientAliveInterval 15
+#ClientAliveCountMax 3
+#UseDNS no
+#PidFile /run/sshd.pid
+#MaxStartups 10:30:100
+#PermitTunnel no
+#ChrootDirectory none
+#VersionAddendum none
+
+# no default banner path
+#Banner none
+
+# Allow client to pass locale environment variables
+AcceptEnv LANG LC_*
+
+# override default of no subsystems
+Subsystem sftp /usr/lib/openssh/sftp-server
+
+# Example of overriding settings on a per-user basis
+#Match User anoncvs
+# X11Forwarding no
+# AllowTcpForwarding no
+# PermitTTY no
+# ForceCommand cvs server
--- /dev/null
+#!/bin/sh
+# This script assumes a server with key-based root access into one of
+# key-based access only to a new non-root account plom.
+#
+# CAUTION: This is optimized for a *fresh* setup. It will overwrite any
+# old /etc/ssh/sshd_config.
+#
+# Dependencies: ssh, scp, properly configured sshd_config file in reach.
+set -e
+. ./misc.sh
+
+# Location of an sshd_config with "PermitRootLogin no" and
+# "PasswordAuthentication no".
+linkable_files_dir="${config_tree_prefix}/etc_files/server"
+system_path_sshd_config='/etc/ssh/sshd_config'
+local_path_sshd_config="${linkable_files_dir}${system_path_sshd_config}"
+
+expect_n_args 1 "(server)" "$@"
+server="$1"
+
+# So we're only asked once …
+eval $(ssh-agent)
+ssh-add
+
+# # This will be used to log-in as root from plom account.
+# echo 'Asking for new root password.'
+# ssh root@"${server}" "passwd"
+#
+# # Set up plom's ~/.ssh/authorized_keys from root's.
+# ssh root@"${server}" 'useradd -m plom'
+# ssh root@"${server}" 'mkdir /home/plom/.ssh'
+# ssh root@"${server}" 'chown plom:plom /home/plom/.ssh'
+# ssh root@"${server}" 'cp /root/.ssh/authorized_keys /home/plom/.ssh/'
+# ssh root@"${server}" 'chown plom:plom /home/plom/.ssh/authorized_keys'
+
+# Set up SSH config and remove direct SSH login to root.
+scp "${local_path_sshd_config}" root@"${server}":"${system_path_sshd_config}"
+ssh root@"${server}" 'rm -rf /root/.ssh && service ssh restart'
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