Disable sshd start on boot in ubuntu

On my local computer, i have installed openssh-server, but i don’t want it always enabled.

To disable openssh-server from auto start on boot, run

systemctl disable ssh

Example

root@lab:~# systemctl disable ssh
Synchronizing state of ssh.service with SysV service script with /lib/systemd/systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install disable ssh
Removed /etc/systemd/system/sshd.service.
Removed /etc/systemd/system/multi-user.target.wants/ssh.service.
root@lab:~# 

If you want to start ssh server on boot, run systelctl enable ssh

root@lab:~# systemctl enable ssh
Synchronizing state of ssh.service with SysV service script with /lib/systemd/systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install enable ssh
Created symlink /etc/systemd/system/sshd.service → /lib/systemd/system/ssh.service.
Created symlink /etc/systemd/system/multi-user.target.wants/ssh.service → /lib/systemd/system/ssh.service.
root@lab:~# 

See Ubuntu