SSH is a network protocol that provides a secure, encrypted connection over an unsecured network, allowing you to remotely control, transfer files, or forward other applications. You can even run graphical X11 applications from remote locations via SSH. SSH is one of the essential skills for Linux users. It allows you to easily manage servers, deploy code, or access resources. In this article, we will introduce the basic usage, options and configuration methods of SSH in Linux to help you master the powerful functions of SSH.
Probably the most popular SSH client under Linux, OpenSSH is installed by default on most Linux distributions. It's open source, free to use and versatile. OpenSSH is also available for other platforms such as Windows, macOS, and BSD.
OpenSSH is lightweight and easy to use. It provides a set of tools that get the job done, no bells and whistles. You can use it for SSH tunneling, secure remote login, and file transfer.
OpenSSH is also equipped with the ssh-keygen utility, which can create encryption keys for more secure remote password-less login.
Related: How to Log In to a Remote Ubuntu 20.04 Server Using Passwordless SSH Keys https://www.linuxmi.com/no-password-ssh-ubuntu-20-04.html
Secure file transfer is another top-level feature of OpenSSH. Using the scp command, you can securely transfer files between two computers, whether locally or over the Internet. The scp utility also allows transferring files between different operating systems. For example, you can transfer files from a Linux server to a Windows PC or macOS.
If you haven't installed OpenSSH yet, install it on a Debian-based distribution (such as Ubuntu) as follows:
linuxmi@linuxmi:~/www.linuxmi.com$ sudo apt install openssh-server
On RHEL based distributions:
linuxmi@linuxmi:~/www.linuxmi.com$ sudo dnf install openssh-server
On Arch Linux:
linuxmi@linuxmi:~/www.linuxmi.com$ sudo pacman -Sy openssh
PuTTY is another powerful open source cross-platform SSH client, originally developed for Windows but now also available for Linux and macOS.
PuTTY has an intuitive and lightweight graphical user interface that is very simple and easy to use. It is loved by many system administrators due to its excellent features.
In addition to SSH, PuTTY also supports a variety of remote connection protocols, such as telnet - a traditional connection protocol that is less secure but very convenient when connecting to systems that do not support SSH.
PuTTY also supports serial connections. Serial connections are very common on network devices such as switches and routers.
Here's how to install PuTTY on Debian or Ubuntu:
linuxmi@linuxmi:~/www.linuxmi.com$ sudo apt install putty
On RHEL based distributions:
linuxmi@linuxmi:~/www.linuxmi.com$ sudo dnf install putty
On Arch Linux and its derivatives:
linuxmi@linuxmi:~/www.linuxmi.com$ sudo pacman -Sy putty
Related: How to install and use PuTTY on Linux https://www.linuxmi.com/linux-putty.html
Termius is a modern and versatile Linux SSH client. It is truly a cross-platform tool and works on both PC and smartphones. It supports macOS, Windows, Linux, Android and iOS platforms.
Termius is free for personal use and has excellent basic functionality. If you need more advanced features and team collaboration, you can subscribe to the Pro or Team version, which is worth the investment based on the features it provides and increased productivity.
Without a doubt, Termius is one of the most customizable SSH clients on the market. It offers different themes, font styles, and other customization features.
With Termius, you can securely synchronize and back up your data and configuration, so you can keep the same look and feel whether you switch to another device. Termius can also import SSH configuration data from other SSH clients such as PuTTY, MobaXterm and SecureCRT.
通过Termius，您可以与团队成员和业务伙伴进行轻松的协作，安全共享SSH会话、访问基础设施，并在云端同步数据。
下载：Termius
MobaXterm是一款功能强大的终端和SSH客户端，最初设计用于Windows。现在它也有适用于Linux的便携版本。
MobaXterm拥有丰富的功能和工具，用于远程计算。它配备了集成的X服务器，允许您远程运行图形界面应用程序并在本地设备上显示。
除了SSH，MobaXterm还支持多种远程连接解决方案，如SFTP、RDP、VNC FTP和较不安全的telnet。它还提供了许多网络工具，支持您的日常工作负载。
通过MobaXterm，您可以轻松管理多个会话。在选项卡式界面中，您可以在不同的选项卡之间切换，方便您同时提供支持或维护多个远程连接。
MobaXterm为您的远程连接需求提供了全面的功能集。它广泛应用于系统管理员、开发人员和IT专业人员。
下载：MobaXterm
相关：MobaXterm – 比 Xshell 更强大更好用的 SSH 客户端神器 https://www.linuxmi.com/mobaxterm-xshell-ssh.html
Terminator不是一个SSH客户端，而是一个支持强大SSH连接的终端仿真器。它是开源的，并且跨平台。
Terminator允许您在单个窗口中打开和管理多个SSH连接。此外，您可以使用它来运行您熟悉的所有Linux命令。
您可以使用Terminator在单个窗口内垂直或水平拆分SSH会话。这样可以让您快速查看信息，并极大提高工作效率。
Terminator提供了很多自定义功能，让您可以个性化用户体验。它允许您自定义字体、颜色、键盘快捷键和其他偏好设置。
以下是在Debian和Ubuntu上安装Terminator的方法：
linuxmi@linuxmi:~/www.linuxmi.com$ sudo apt install terminator
在Arch Linux上安装：
linuxmi@linuxmi:~/www.linuxmi.com$ sudo pacman -S terminator
在基于RHEL的发行版上安装：
linuxmi@linuxmi:~/www.linuxmi.com$ sudo dnf install epel-release && sudo dnf install terminator
相关：Terminator 2.0.1发布，Linux高级终端的未来 https://www.linuxmi.com/terminator-2-0-1-linux.html
Remmina是一个功能丰富的基于GUI的远程桌面和SSH客户端，适用于Linux。它拥有清晰、用户友好的界面，因此在工程师中很受欢迎。
除了SSH，Remmina还支持其他远程连接协议，如远程桌面协议（RDP）、VNC、NX、SPICE等。这使您能够连接更广泛的操作系统。
通过Remmina，您可以轻松自定义显示设置、键盘快捷键、身份验证方法等。管理和组织您的远程连接会话和设备。保存连接配置文件，并对其进行排序，以便快速访问和协作。
选项卡式界面允许您在单个窗口内管理多个远程会话。这在您希望在不打开多个窗口的情况下在不同连接之间切换时非常方便。
Remmina还具备文件传输功能，允许您在本地计算机和远程PC之间传输文件。
在基于Debian的发行版上运行以下命令以安装Remmina：
linuxmi@linuxmi:~/www.linuxmi.com$ sudo apt install remmina
在Arch Linux上安装：
linuxmi@linuxmi:~/www.linuxmi.com$ sudo pacman -S remmina
在基于RHEL的发行版上运行：
linuxmi@linuxmi:~/www.linuxmi.com$ sudo dnf install remmina
SSH是一种安全协议，提供了出色的远程管理能力。特别是对于连接没有图形界面的远程Linux服务器来说，它非常重要。
通过选择适合您需求的正确SSH客户端，提高您的工作效率并改进工作流程。
在本文中，我们学习了 Linux 中 SSH 的基本用法、选项和配置方法。我们了解了如何使用 ssh 命令来连接远程主机、如何使用 scp 和 sftp 命令来传输文件、如何使用 sshfs 命令来挂载远程文件系统或目录。我们还介绍了如何生成和添加 SSH 密钥对，以及如何修改 SSH 服务端和客户端的配置文件。通过掌握这些技能，你可以更安全、高效地使用 SSH 来管理你的 Linux 系统。
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