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Managing multiple Linux servers via SSH

Posted by jl on September 5 2011th

Hello everyone

As the number of Linux servers to be administered is more tedious it grows when you make a change that affects several or even install updates. To help in the management tasks tasks Linux servers I'll talk about a tool called Clusterssh. This tool allows us to open an ssh session against a number of Linux servers and manage them simultaneously.

To install, Ubuntu distributions Debian just run from a terminal

# Apt-get install clusterssh

The way to use it is very easy, from a console, run cssh followed by the name or ip of the servers you want to connect

servidor1 #cssh servidor2 servidor3

This will open as many terminals as servers and an additional screen is where you will enter commands to be replicated to all terminals as seen in the picture below Megacrack read »

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Posted by how to, Linux, Linux - Ubuntu, Utilities | No Comments »

Grant permissions to root to access SSH in VMware ESX.

Posted by Xaus Xavier Nadal 14th on August 2009


Sometimes the need arises to have more normal permissions to perform certain actions on our systems.

In this article I'll show how to configure the ESX so that you can access it via a secure telnet (SSH) with the user with maximum permissions in our system VMWARE ESX is the user root.

Default in all installations of ESX this option is un-configured for a clear security issue.

We as are system administrators and need to have the largest number of existing permits we will change to for example enter with WinSCP and able to move at will from a Windows environment (friendly) files from one folder to another without entering with a tool like putty for from a command line to move files.

Well here we go:

We can make 2 ways: One is by going directly to the machine and pressing ALT + F1 to enter a console session and execute commands which I explain below

The other way is accessed via putty and elevating permissions.

We walked in with putty at a session screen ESX server that we will modify.

Login: <User>

Password: <Password>

We wrote his -

Enter the root password

Editar el el comando fichero sshd_config mediante vi / etc / ssh / sshd_config

Press I.

Add # Delante the línea PermitRootLogin.

The pulsar tecla Esc y escribir : Wq

Escribir el comando: service sshd restart.

From now on we can access directly without having to elevate permissions.

Espero that bones of SIRVA ayuda MegaCracks.

PD: No abuséis de los permisos.

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Posted by VMware | 2 Comments »

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