[리눅스] 우분투 ssh 설치

1 설치 확인

#netstat -ntlp | grep sshd

#service ssh status

nadahacker@nada_ubuntu:~$ netstat -ntlp | grep sshd

(Not all processes could be identified, non-owned process info

will not be shown, you would have to be root to see it all.)

nadahacker@nada_ubuntu:~$ service ssh status

● ssh.service - OpenBSD Secure Shell server

Loaded: loaded (/lib/systemd/system/ssh.service; enabled; vendor preset: enab

Active: active (running) since Sat 2019-04-06 03:02:38 UTC; 2h 27min ago

Main PID: 2228 (sshd)

Tasks: 1 (limit: 1019)

CGroup: /system.slice/ssh.service

└─2228 /usr/sbin/sshd -D

Apr 06 03:02:38 nada_ubuntu systemd[1]: Starting OpenBSD Secure Shell server...

Apr 06 03:02:38 nada_ubuntu sshd[2228]: Server listening on 0.0.0.0 port 22.

Apr 06 03:02:38 nada_ubuntu sshd[2228]: Server listening on :: port 22.

Apr 06 03:02:38 nada_ubuntu systemd[1]: Started OpenBSD Secure Shell server.

Apr 06 03:04:09 nada_ubuntu sshd[2349]: Accepted password for nadahacker from 19

Apr 06 03:04:09 nada_ubuntu sshd[2349]: pam_unix(sshd:session): session opened f

Apr 06 05:29:23 nada_ubuntu sshd[2508]: Accepted password for nadahacker from 19

Apr 06 05:29:23 nada_ubuntu sshd[2508]: pam_unix(sshd:session): session opened f

nadahacker@nada_ubuntu:~$

위내용처럼 나오지 않으면 설치가 안된것이다.. 본인은 설치를 한상태이다..

2 ssh 설치된정보를 본다.

#dpkg --get-selections | grep ssh

nadahacker@nada_ubuntu:~$ dpkg --get-selections | grep ssh

openssh-client install

openssh-server install

openssh-sftp-server install

ssh-import-id install

nadahacker@nada_ubuntu:~$

현재는 모두설치되어 있는 모습

3 ssh 설치

#sudo apt-get install openssh-server

nadahacker@nada_ubuntu:~$ sudo apt-get install openssh-server

[sudo] password for nadahacker:

Reading package lists... Done

Building dependency tree

Reading state information... Done

openssh-server is already the newest version (1:7.6p1-4ubuntu0.3).

0 upgraded, 0 newly installed, 0 to remove and 43 not upgraded.

nadahacker@nada_ubuntu:~$

4 ssh 시작

#service ssh start

nadahacker@nada_ubuntu:~$ service ssh start

==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-units ===

Authentication is required to start 'ssh.service'.

Authenticating as: nadahacker

Password:

==== AUTHENTICATION COMPLETE ===

5 ssh 상태 확인

#service ssh status

nadahacker@nada_ubuntu:~$ service ssh status

● ssh.service - OpenBSD Secure Shell server

Loaded: loaded (/lib/systemd/system/ssh.service; enabled; vendor preset: enab

Active: active (running) since Sat 2019-04-06 03:02:38 UTC; 6h ago

Main PID: 2228 (sshd)

Tasks: 1 (limit: 1019)

CGroup: /system.slice/ssh.service

└─2228 /usr/sbin/sshd -D

Apr 06 03:02:38 nada_ubuntu systemd[1]: Starting OpenBSD Secure Shell server...

Apr 06 03:02:38 nada_ubuntu sshd[2228]: Server listening on 0.0.0.0 port 22.

Apr 06 03:02:38 nada_ubuntu sshd[2228]: Server listening on :: port 22.

Apr 06 03:02:38 nada_ubuntu systemd[1]: Started OpenBSD Secure Shell server.

Apr 06 03:04:09 nada_ubuntu sshd[2349]: Accepted password for nadahacker from 19

Apr 06 03:04:09 nada_ubuntu sshd[2349]: pam_unix(sshd:session): session opened f

Apr 06 05:29:23 nada_ubuntu sshd[2508]: Accepted password for nadahacker from 19

Apr 06 05:29:23 nada_