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What are some of the emerging SSH use cases and scenarios in cloud computing and web development?

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Secure Shell (SSH) is a versatile and secure protocol that allows you to remotely access, manage, and transfer data between different devices and servers. SSH is widely used by cloud computing and web development professionals, who rely on it for various tasks and workflows. In this article, we will explore some of the emerging SSH use cases and scenarios in these fields, and how they can benefit from the latest SSH trends and innovations.

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1 Remote development with SSH

One of the main advantages of SSH is that it enables you to work on remote servers and devices without having to install or configure any software locally. This is especially useful for web developers, who can use SSH to edit, debug, and deploy code on cloud platforms and hosting services. For example, you can use SSH to connect to a virtual machine (VM) or a container running on a cloud service provider, and use your preferred code editor or integrated development environment (IDE) to work on your project files. You can also use SSH to run commands, scripts, and tools on the remote server, and monitor the performance and status of your application.

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2 SSH tunneling and port forwarding

Another common SSH use case is to create secure and encrypted tunnels between different devices and servers, and forward network traffic through them. This is also known as SSH tunneling or port forwarding, and it can help you overcome network restrictions, firewall rules, and security risks. For example, you can use SSH tunneling to access a web application or a database that is running on a private network or a remote server, and expose it to your local browser or client. You can also use SSH tunneling to securely transfer files between devices and servers, or to create a proxy server that routes your web traffic through a different location.

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3 SSH multiplexing and multiparty access

SSH also allows you to establish multiple connections and sessions over a single SSH connection, and share them with other users. This is known as SSH multiplexing and multiparty access, and it can improve your efficiency, collaboration, and security. For example, you can use SSH multiplexing to reuse an existing SSH connection for multiple sessions, and avoid the overhead of creating and authenticating new connections. You can also use SSH multiparty access to grant other users access to your SSH sessions, and collaborate on remote tasks and projects. This can be done by using tools like tmux or screen, which create terminal multiplexers that allow you to split and share your terminal windows.

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4 SSH certificates and keys

SSH relies on cryptographic keys and certificates to authenticate users and devices, and to encrypt the communication between them. SSH keys and certificates are more secure and convenient than passwords, as they do not require user input or storage, and they can be easily generated and managed. However, SSH keys and certificates also pose some challenges, such as how to distribute, rotate, revoke, and audit them. For example, you may have to deal with multiple SSH keys and certificates for different devices and servers, and keep track of their expiration dates and permissions. You may also have to protect your SSH keys and certificates from theft, loss, or compromise.

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Jon Baldassari

Senior Linux Administrator, Princeton Neuroscience Institute, Princeton University
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If automation is needed for copying files, the ssh keys can setup without a password which is convenient for admins and to copy files using the scp and sftp commands. Also, permission MUST be correct on the and the .ssh directory as well. The keys are also portable, which can be done using can be done via automation tools, puppet, ansible, etc... ls -ld .ssh drwx------ 2 jbaldassari jbaldassari 4096 Apr 19 15:24 .ssh ls -l .ssh total 16 -rw-r--r-- 1 jbaldassari jbaldassari 0 Mar 29 08:14 authourized_keys -rw------- 1 jbaldassari jbaldassari 2602 Feb 27 07:49 id_rsa -rw-r--r-- 1 jbaldassari jbaldassari 570 Feb 27 07:49 id_rsa.pub -rw-r--r-- 1 jbaldassari jbaldassari 888 Apr 24 06:35 known_hosts

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Giuseppe (Joseph) Schintu

Lead Technologist @ Booz Allen Hamilton | AI | ML | DM | Enterprise Architecture | Software Engineering | IT Integrations
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SSH keys typically follow certain conventions: 1. **File Name:** Conventionally, private keys are named "id_rsa" and public keys "id_rsa.pub", stored in the ~/.ssh directory. 2. **Start and End Tags:** - **Private Key:** Starts with `-----BEGIN RSA PRIVATE KEY-----` and ends with `-----END RSA PRIVATE KEY-----`. Headers and footers vary if the key is DSA or ECDSA. - **Public Key:** Starts with the key type (`ssh-rsa`, `ssh-dss`, `ecdsa-sha2-nistp256`, or `ssh-ed25519`), followed by the base64-encoded key, and a comment at the end. 3. **File Permissions:** In Unix-like systems, private keys should have 0600 (`-rw-------`) permissions. Please note that these tips are general, and some details might differ in your particular case.

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5 SSH automation and orchestration

SSH can also be used to automate and orchestrate various tasks and workflows across different devices and servers, and to integrate them with other tools and platforms. SSH automation and orchestration can help you save time, reduce errors, and increase productivity. For example, you can use SSH to automate the deployment, configuration, and maintenance of your web applications and cloud resources, and to trigger actions based on events or schedules. You can also use SSH to orchestrate the execution of commands, scripts, and tools across multiple devices and servers, and to collect and analyze the output. You can use tools like Ansible, Puppet, or Chef, which are based on SSH, to perform these tasks.

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Paul T?tterman

Chief Technology Officer, Co-founder at Carecode
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SSH keypairs combined with rsync or forced commands are very powerful backup and automation tools. Like webhooks without the web stack.

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6 SSH security and compliance

SSH is designed to provide a high level of security and compliance for your remote access and data transfer needs. SSH uses strong encryption algorithms, key exchange methods, and authentication mechanisms to protect your data and identity. SSH also supports various security and compliance features, such as logging, auditing, access control, and encryption at rest. For example, you can use SSH to log and audit your SSH sessions and activities, and to detect and prevent unauthorized or malicious access. You can also use SSH to enforce access control policies and rules, and to restrict or limit the actions and resources available to different users and devices. You can also use SSH to encrypt your data at rest on the remote devices and servers, and to comply with data protection regulations and standards.

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Paul T?tterman

Chief Technology Officer, Co-founder at Carecode
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FIDO2 resident keys combined with OpenSSH FIDO support allow you to have extremely secure access tokens in the form of cheap FIDO2 keys (YubiKey, Token2, ..)

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7 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?

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What are some of the emerging SSH use cases and scenarios in cloud computing and web development?

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1 Remote development with SSH

2 SSH tunneling and port forwarding

3 SSH multiplexing and multiparty access

4 SSH certificates and keys

5 SSH automation and orchestration

6 SSH security and compliance

7 Here’s what else to consider

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