OpenSSH openssh-server configuration example for Ubuntu 18.04 LTS (Bionic Beaver)

Get the default configuration file openssh-server for OpenSSH, optimized for Ubuntu 18.04 LTS (Bionic Beaver). This example configuration ensures optimal compatibility and performance for OpenSSH, making it easy to set up and adjust to meet your needs.

Find and download the configuration file here: /etc/network/if-up.d/openssh-server.

For more configurations and setup guides, visit our related files section to further customize your system.

    #! /bin/sh
# Reload the OpenSSH server when an interface comes up, to allow it to start
# listening on new addresses.

set -e

# Don't bother to restart sshd when lo is configured.
if [ "$IFACE" = lo ]; then
	exit 0
fi

# Only run from ifup.
if [ "$MODE" != start ]; then
	exit 0
fi

# OpenSSH only cares about inet and inet6. Get ye gone, strange people
# still using ipx.
if [ "$ADDRFAM" != inet ] && [ "$ADDRFAM" != inet6 ]; then
	exit 0
fi

# Is /usr mounted?
if [ ! -e /usr/sbin/sshd ]; then
	exit 0
fi

if [ ! -f /run/sshd.pid ] || \
   [ "$(ps -p "$(cat /run/sshd.pid)" -o comm=)" != sshd ]; then
	exit 0
fi

# We'd like to use 'reload' here, but it has some problems; see #502444.  On
# the other hand, repeated restarts of ssh make systemd unhappy
# (#756547/#757822), so use reload in that case.
if [ -d /run/systemd/system ]; then
	systemctl reload --no-block ssh.service >/dev/null 2>&1 || true
else
	invoke-rc.d ssh restart >/dev/null 2>&1 || true
fi

exit 0

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