How to install SSH in Ubuntu
- 2020-06-05 15:41:00
- Ley Boi Original
- 1723
Intro
SSH is a network protocol used for encrypted login between computers.
If a user could log in to a remote computer using the SSH protocol from a local computer, this login is safe, and even if it is intercepted halfway, the password will not be disclosed.
1. Install SSH
Open your terminal and run
sudo apt-get install openssh-server
2. Edit the configuration file
Run
sudo vim /etc/ssh/sshd_configand change PermitRootLogin to yes, so root user can log in.
... #LoginGraceTime 2m #PermitRootLogin prohibit-password PermitRootLogin yes #StrictModes yes #MaxAuthTries 6 #MaxSessions 10 ...
3. Install the UFW
Run
sudo apt-get install ufw
4. Allow a port
Run
sudo ufw allow 22to allow port number 22.
5. Close the UFW
If temporarily close the UFW, run
sudo ufw enableIf permanently close the UFW, run
sudo ufw disable
6. Connect
Run ifconfig to check the IP (e.g. 192.168.192.128). Connect to this IP through the SSH connection tool, and enter the account and password to connect.
root@ubuntu:~# ifconfig docker0: flags=4163 mtu 1500 inet 172.17.0.1 netmask 255.255.0.0 broadcast 172.17.255.255 inet6 fe80::42:37ff:fe4e:34da prefixlen 64 scopeid 0x20 ether 02:42:37:4e:34:da txqueuelen 0 (Ethernet) RX packets 14 bytes 2348 (2.3 KB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 65 bytes 6916 (6.9 KB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 ens33: flags=4163 mtu 1500 inet 192.168.192.128 netmask 255.255.255.0 broadcast 192.168.192.255 inet6 fe80::6963:2d68:8113:d16 prefixlen 64 scopeid 0x20 ether 00:0c:29:1e:44:b8 txqueuelen 1000 (Ethernet) RX packets 101298 bytes 144452064 (144.4 MB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 24067 bytes 1818654 (1.8 MB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
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