【Linux】ubuntu安装ssh服务端openssh-server

1、背景

ubuntu安装后默认只有ssh客户端，只能去连其它ssh服务器；

其它客户端想要连接这个ubuntu系统，需要安装部署ssh服务端！

Secure Shell（SSH）是一种加密网络协议，用于在不安全的网络上安全地运行网络服务。

利用SSH可以实现加密并安全地远程登录计算机系统。

2、解决办法

安装命令如下：

sudo apt install openssh-server

详细安装日志：

yus@jn10010537:~/Test$ sudo apt install openssh-serverReading package lists... DoneBuilding dependency tree Reading state information... DoneThe following additional packages will be installed:ncurses-term openssh-sftp-server ssh-import-idSuggested packages:molly-guard monkeysphere rssh ssh-askpassThe following NEW packages will be installed:ncurses-term openssh-server openssh-sftp-server ssh-import-id0 upgraded, 4 newly installed, 0 to remove and 10 not upgraded.Need to get 637 kB of archives.After this operation, 5,316 kB of additional disk space will be used.Do you want to continue? [Y/n] YGet:1 https://mirrors.tuna./ubuntu bionic-updates/main amd64 ncurses-term all 6.1-1ubuntu1.18.04 [248 kB]Get:2 https://mirrors.tuna./ubuntu bionic-updates/main amd64 openssh-sftp-server amd64 1:7.6p1-4ubuntu0.3 [45.6 kB]Get:3 https://mirrors.tuna./ubuntu bionic-updates/main amd64 openssh-server amd64 1:7.6p1-4ubuntu0.3 [333 kB]Get:4 https://mirrors.tuna./ubuntu bionic-updates/main amd64 ssh-import-id all 5.7-0ubuntu1.1 [10.9 kB]Fetched 637 kB in 1s (458 kB/s) Preconfiguring packages ...Selecting previously unselected package ncurses-term.(Reading database ... 190012 files and directories currently installed.)Preparing to unpack .../ncurses-term_6.1-1ubuntu1.18.04_all.deb ...Unpacking ncurses-term (6.1-1ubuntu1.18.04) ...Selecting previously unselected package openssh-sftp-server.Preparing to unpack .../openssh-sftp-server_1%3a7.6p1-4ubuntu0.3_amd64.deb ...Unpacking openssh-sftp-server (1:7.6p1-4ubuntu0.3) ...Selecting previously unselected package openssh-server.Preparing to unpack .../openssh-server_1%3a7.6p1-4ubuntu0.3_amd64.deb ...Unpacking openssh-server (1:7.6p1-4ubuntu0.3) ...Selecting previously unselected package ssh-import-id.Preparing to unpack .../ssh-import-id_5.7-0ubuntu1.1_all.deb ...Unpacking ssh-import-id (5.7-0ubuntu1.1) ...Setting up ncurses-term (6.1-1ubuntu1.18.04) ...Setting up openssh-sftp-server (1:7.6p1-4ubuntu0.3) ...Setting up ssh-import-id (5.7-0ubuntu1.1) ...Setting up openssh-server (1:7.6p1-4ubuntu0.3) ...Creating config file /etc/ssh/sshd_config with new versionCreating SSH2 RSA key; this may take some time ...2048 SHA256:UVU9dG8lhh4sAvp68p7I/V2I3VEkQcqLJopXcgbqARw root@ts006-MS-7A94 (RSA)Creating SSH2 ECDSA key; this may take some time ...256 SHA256:Nh0RpvlORi2IRD5r6T/SHEZFfcJRlkKIJxRZ4kgu3pc root@ts006-MS-7A94 (ECDSA)Creating SSH2 ED25519 key; this may take some time ...256 SHA256:NbjnEQNRR8UHfUyt1Wl+PrfMkHev6y3PxeunU+cQhJQ root@ts006-MS-7A94 (ED25519)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.Processing triggers for man-db (2.8.3-2ubuntu0.1) ...Processing triggers for ufw (0.36-0ubuntu0.18.04.1) ...Processing triggers for ureadahead (0.100.0-21) ...ureadahead will be reprofiled on next rebootProcessing triggers for systemd (237-3ubuntu10.39) ...yus@jn10010537:~/Test$ sudo ifconfig[sudo] password for yus:eno1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500inet 192.168.1.104 netmask 255.255.255.0 broadcast 192.168.1.255inet6 fe80::a11d:bb94:cfa3:1f2f prefixlen 64 scopeid 0x20<link>ether 00:d8:61:18:0d:95 txqueuelen 1000 (Ethernet)RX packets 5268399 bytes 4657862121 (4.6 GB)RX errors 0 dropped 0 overruns 0 frame 0TX packets 24091941 bytes 23694574458 (23.6 GB)TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0device interrupt 16 memory 0x92f00000-92f20000 lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536inet 127.0.0.1 netmask 255.0.0.0inet6 ::1 prefixlen 128 scopeid 0x10<host>loop txqueuelen 1000 (Local Loopback)RX packets 2934074 bytes 23413782285 (23.4 GB)RX errors 0 dropped 0 overruns 0 frame 0TX packets 2934074 bytes 23413782285 (23.4 GB)TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0yus@jn10010537:~/Test$

3、测试

在windows下安装git,通过git Bash进行ssh安全通信。

注意：windows10机器与ubuntu机器是同一网段，即192.168.1.x ！

如下表示连接成功 ！

Administrator@PJ9NM MINGW64 ~$ ssh yus@192.168.1.104yus@192.168.1.104's password:Welcome to Ubuntu 18.04.4 LTS (GNU/Linux 5.3.0-51-generic x86_64)* Documentation: * Management:* Support: /advantage* Canonical Livepatch is available for installation.- Reduce system reboots and improve kernel security. Activate at:/livepatch11 packages can be updated.0 updates are security updates.Your Hardware Enablement Stack (HWE) is supported until April .The programs included with the Ubuntu system are free software;the exact distribution terms for each program are described in theindividual files in /usr/share/doc/*/copyright.Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted byapplicable law.yus@jn10010537:~$