Ubuntu basic settings: introduction to the installation and use of openssh-server

Record the installation and use of openssh-server for Ubuntu 17.10. After installation, you can use ssh to log in to Ubuntu, so it is one of the basic settings of Ubuntu.

Ubuntu version: 17.10
devops@ubuntu:~$ cat /etc/issue
Ubuntu 17.10 \n \l
devops@ubuntu:~$ 
devops@ubuntu:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:  Ubuntu 17.10
Release:17.10
Codename:  artful
devops@ubuntu:~$

17.10 The Ubuntu codename Artful Aardvark was officially released on October 19, 2017. It is the first version to replace GNOME, but this is not an LTS version. It will be supported until August 2018. It is a transition before the LTS version of Ubuntu in 2018. version. The installation of openssh-server basically has a very low impact on the Ubuntu version, and the basic operation steps are roughly the same.

installation steps

Follow the installation steps below to install

Operation log

Here is the log captured in the installed state, the display of apt install will be different

devops@ubuntu:~$ sudo su
[ sudo] password for devops: 
root@ubuntu:/home/devops# 
root@ubuntu:/home/devops# apt install openssh-server
Reading package lists... Done
Building dependency tree    
Reading state information... Done
openssh-server is already the newest version(1:7.5p1-10ubuntu0.1).0 upgraded,0 newly installed,0 to remove and 55 not upgraded.
root@ubuntu:/home/devops# 
root@ubuntu:/home/devops# ssh -V
OpenSSH_7.5p1 Ubuntu-10ubuntu0.1, OpenSSL 1.0.2g 1 Mar 2016
root@ubuntu:/home/devops# 
root@ubuntu:/home/devops# /etc/init.d/ssh status
● ssh.service - OpenBSD Secure Shell server
 Loaded:loaded(/lib/systemd/system/ssh.service; enabled; vendor preset: enabled)
 Active:active(running) since Sat 2018-03-0307:58:44 CST; 51min ago
 Process:3072 ExecReload=/bin/kill -HUP $MAINPID(code=exited, status=0/SUCCESS)
 Process:3071 ExecReload=/usr/sbin/sshd -t(code=exited, status=0/SUCCESS)
 Process:3167 ExecStartPre=/usr/sbin/sshd -t(code=exited, status=0/SUCCESS)
 Main PID:3179(sshd)
 Tasks:1(limit:4915)
 Memory:1.0M
 CPU: 7ms
 CGroup:/system.slice/ssh.service
  └─3179/usr/sbin/sshd -D
Mar 0307:58:44 ubuntu systemd[1]: Starting OpenBSD Secure Shell server...
Mar 0307:58:44 ubuntu systemd[1]: Started OpenBSD Secure Shell server.
Mar 0307:58:44 ubuntu sshd[3179]: Server listening on 0.0.0.0 port 22.
Mar 0307:58:44 ubuntu sshd[3179]: Server listening on :: port 22.
root@ubuntu:/home/devops# 
root@ubuntu:/home/devops# /etc/init.d/ssh restart
[ ok ] Restarting ssh(via systemctl): ssh.service.
root@ubuntu:/home/devops#

Ssh connection from terminal

liumiaocn:~ liumiao$ ssh [email protected]
[email protected]'s password: 
Welcome to Ubuntu 17.10(GNU/Linux 4.13.0-21-generic x86_64)* Documentation: https://help.ubuntu.com
 * Management:   https://landscape.canonical.com
 * Support:    https://ubuntu.com/advantage
58 packages can be updated.32 updates are security updates.
Last login: Sat Mar 307:43:232018from192.168.31.242
devops@ubuntu:~$