{"id":21363,"date":"2023-10-01T17:23:18","date_gmt":"2023-10-01T17:23:18","guid":{"rendered":"https:\/\/linuxways.net\/?p=21363"},"modified":"2023-10-01T17:23:18","modified_gmt":"2023-10-01T17:23:18","slug":"how-to-set-up-ssh-on-ubuntu-22-04","status":"publish","type":"post","link":"https:\/\/linuxways.net\/de\/ubuntu\/how-to-set-up-ssh-on-ubuntu-22-04\/","title":{"rendered":"How to Set Up SSH on Ubuntu 22.04?"},"content":{"rendered":"

SSH (Secure Socket Shell) is a client-server technology that allows system administrators to access an unsecured network in a secure way. SSH is a network protocol like HTTP that is used on top of the TCP\/IP layer and is part of the \u201cApplication Layer<\/strong>\u201d. The SSH consists of a \u201ctransport layer<\/strong>\u201d, a \u201cconnection layer<\/strong>\u201d, and a \u201cuser authentication layer<\/strong>\u201d. On Ubuntu, the OpenSSH Client runs on the TCP Port 22.<\/p>\n

This article explains the integration of SSH with Ubuntu 22.04.<\/p>\n

How to Set Up SSH on Ubuntu 22.04?<\/strong><\/h2>\n

To set up SSH on Ubuntu, follow the procedure below with each step explaining the commands in a simple way:<\/p>\n

Step 1: Update and Upgrade Ubuntu System<\/strong><\/h3>\n

Before installing SSH, make sure to update the repository first and then upgrade the packages. To update and upgrade use the command:<\/p>\n

sudo<\/span> apt update<\/div><\/div>\n

<\/p>\n

To upgrade use the command:<\/p>\n

sudo<\/span> apt upgrade<\/div><\/div>\n

<\/p>\n

Step 2: Installing SSH<\/strong><\/h3>\n

To install SSH, use the command \u201copenssh-server<\/strong>\u201d with the apt install in the terminal.<\/p>\n

sudo<\/span> apt install<\/span> openssh-server -y<\/span><\/div><\/div>\n

It will take some time to install the necessary packages, wait for it:<\/p>\n

<\/p>\n

Step 3: Checking the Status of the Server<\/strong><\/h3>\n

Once the installation of the SSH Server is completed, confirm by checking the status of the server. To check the status, use the following command:<\/p>\n

sudo<\/span> systemctl status ssh<\/span><\/div><\/div>\n

<\/strong><\/p>\n

Step 4: Allowing Connection<\/strong><\/h3>\n

As the SSH Server is running, now we need to allow the connection on the SSH Port. Use the command below:<\/p>\n

sudo<\/span> ufw allow ssh<\/span><\/div><\/div>\n

This will allow the connection:<\/p>\n

<\/p>\n

Step 5: Save the UFW Rules<\/strong><\/h3>\n

UFW or \u201cUncomplicated FireWall\u201d is a user-friendly tool used for managing \u201cip-tables\u201d and \u201cfirewall rules\u201d. Enable and reload the \u201cufw\u201d to save changes in \u201cufw\u201d using the command:<\/p>\n

sudo<\/span> ufw enable<\/span> &&<\/span> sudo<\/span> ufw reload<\/div><\/div>\n

This will configure the Firewall:<\/p>\n

<\/p>\n

Step 6: Connect the Client to the Host<\/strong><\/h3>\n

To connect another Linux System to the Host System using SSH ensure that \u201copenssh-server\u201d is installed and you use the correct IP Address and Hostname with the command<\/p>\n

ssh<\/span> <<<\/span>strong><\/span>hostname<\/span><\/<\/span>strong>>@<<<\/span>strong><\/span>ip<\/span><\/<\/span>strong><\/span> address><\/span><\/div><\/div>\n

In our case, our host has the IP of \u201c192.168.184.30<\/strong>\u201d and the hostname is \u201ctahakhan<\/strong>\u201d. To check the IP address of your Ubuntu system, use the command:<\/p>\n

ip<\/span> a<\/div><\/div>\n

This will display the IP Address of the Ubuntu system<\/p>\n

<\/p>\n

Now, in the client or any other system, use the command below to connect to the host server.<\/p>\n

ssh<\/span> tahakhan@<\/span>192.168.184.130<\/div><\/div>\n

In our case, we have a Client System named \u201cubuntu1<\/strong>\u201d and its IP is \u201c192.168.184.131<\/strong>\u201d:<\/p>\n

<\/p>\n

To connect the client \u201cubuntu1\u201d with server \u201ctahakhan\u201d, our command will be:<\/p>\n

ssh<\/span> tahakhan@<\/span>192.168.184.130<\/div><\/div>\n

It will ask for confirmation to continue the connection. Enter \u201cyes<\/strong>\u201d:<\/p>\n

<\/p>\n

Now it will ask for the server host(tahakhan) password for authentication:<\/p>\n

<\/p>\n

Enter the host system password. If the password is verified, you will see the Login status and you will now have access to the server system. <\/p>\n

Use the \u201cls\u201d command to list the host system files:<\/p>\n

<\/p>\n

Using this procedure, you can connect and access the host system.<\/p>\n

Step 7: Logout of the Server<\/strong><\/h3>\n

To logout the client (ubuntu1) from the server (tahakhan), use the command:<\/p>\n

exit<\/span><\/div><\/div>\n

This will log you out from the Server and Exit it. You will be back on your client system again:<\/p>\n

<\/p>\n

Step 8: Checking Login History (Optional)<\/strong><\/h3>\n

In the hosting system, you can also verify and check the recent login from clients using the command:<\/p>\n

grep<\/span> "sshd"<\/span> \/<\/span>var\/<\/span>log\/<\/span>auth.log<\/div><\/div>\n

<\/p>\n

Check the recent history by scrolling down to the last info. Here you can see the recent connection by the client having an IP Address of \u201c192.168.184.131\u201d. This IP Address was of the client \u201cubuntu1\u201d.<\/p>\n

<\/p>\n

Conclusion<\/strong><\/h2>\n

To Set Up SSH on Ubuntu 22.04, first, use the \u201copenssh-server\u201d, update the rules, and configure the firewall to allow \u201cssh\u201d connections over a secure connection of the host with clients. SSH is used for secure connection to host servers and we can remotely access files and devices on the host system. This article explained how we can use the \u201copenssh-server\u201d, update the rules to allow \u201cssh\u201d connections, and then configure the firewall to allow a secure connection of the host with clients.<\/p>","protected":false},"excerpt":{"rendered":"

Use the \u201copenssh-server\u201d, update the rules, and configure the firewall to allow \u201cssh\u201d connections over a secure connection of the host with clients. <\/p>","protected":false},"author":110,"featured_media":22468,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-21363","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ubuntu"],"_links":{"self":[{"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/posts\/21363","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/users\/110"}],"replies":[{"embeddable":true,"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/comments?post=21363"}],"version-history":[{"count":0,"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/posts\/21363\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/media\/22468"}],"wp:attachment":[{"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/media?parent=21363"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/categories?post=21363"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/tags?post=21363"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}