Tags: SSH

Learn Advanced SSH Commands with the New Cheat Sheet

Secure Shell (SSH) is a powerful tool for connecting to remote servers. But with all that power comes a dizzying array of options and flags. The ssh client command has many options—some for daily use and some arcane. I put together a cheat sheet for some common SSH uses. It doesn't begin to cover...
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Seahorse
Learn how to manage both PGP and SSH keys with the Seahorse GUI tool.

How to Manage PGP and SSH Keys with Seahorse

Security is tantamount to peace of mind. After all, security is a big reason why so many users migrated to Linux in the first place. But why stop with merely adopting the platform, when you can also employ several techniques and technologies to help secure your desktop or server systems. One such...
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The Story of Getting SSH Port 22

The SSH (Secure Shell) port is 22. It is not a co-incidence. This is a story I (Tatu Ylonen) haven't told before. I wrote the initial version of SSH in Spring 1995. It was a time when telnet and FTP were widely used. Anyway, I designed SSH to replace both telnet (port 23) and ftp (port 21). Port 22...
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New Linux SSH Server Shows Off Golang's Infrastructure Power

Gravitational, maker of a software-as-a-service support system built with Kubernetes, has released the latest open source iteration of a key part of that system. Teleport, an SSH server that provides support teams with a simpler way to remotely manage server clusters, is an example of Google's Go...
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Restrict SSH User Access to Certain Directory Using Chrooted Jail

There are several reasons to restrict a SSH user session to a particular directory, especially on web servers, but the obvious one is a system security. In order to lock SSH users in a certain directory, we can use chroot mechanism. change root (chroot) in Unix-like systems such as Linux, is a...
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security tutorials
Check out these top tutorials from Linux.com to help you improve your Linux server security.

Best Linux Server Security Tutorials on Linux.com

The first rule of Linux server security is to keep your server lean and mean. Only install the packages and run the services that you really need, writes Swapnil Bhartiya in his Linux.com tutorial on making your server more secure. “Even the most hardened servers can be hijacked by exploiting any...
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remote administration
To administer a remote server, you need tools that can reach beyond the local. With ssh and scp, however, you can easily work with remote machines to make your admin life considerably easier.

Go Beyond Local with Secure Shell

If you have high hopes of becoming a Linux administrator, there are plenty of tools you’ll need to know and know well. Some of those tools are limited to actions taken locally on the machine with which you are working: tools like iptables, make, top, diff, tail, and many more. These tools, isolated...
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4 Reasons Why SSH Connection Fails

As DevOps or IT professionals, people may ask us why they can't ssh to servers. It happens from time to time. Isn't right? Not much fun. Just routine work. Want to ease the pain and burden? Let's examine common ssh failures together. Next time forward this link to your colleagues, if useful. People...
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Thirteen Ways Containers are More Secure than Virtual Machines

Last year, conventional wisdom had it that containers were much less secure than virtual machines (VMs)! Why? Because it was easier to break out of the container abstraction layer, which is arguably weaker than VM abstractions supported byhardware VT-x optimization. Once broken loose, malicious...
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Creating functional ssh keypair on RDO Mitaka via Chrome Advanced REST Client

The problem here is that REST API POST request creating ssh-keypair to access nova servers  doesn't write to disk rsa private key  and only upload public one to nova. Closing Chrome Client results loosing rsa private key. To prevent failure to write to disk private key , save response-export.json...
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