Eu vou andando Sozinho
Pelas ruas sem destino
Os carros passam acelerados
Pessoas vao num passo apressado
Mil pensamentos na cabeca
Vem e vao num segundo
Tudo gira de vagar
Essa e uma estranha sensacao
Quando olho pra tras
Tudo passou num carrerao
Quadros nas paredes, imoveis
Sera que estao parados?
O mundo gira la fora
como pode algo nao ser sugado
Por esse turbilhao
Que passa desembestado
O mnundo gira, os carros passam
A vida passa e tudo muda
Tudo muda, sera?! Ou nada muda?
O mundo gira desembestado
A vida passa num carreirao
Vai num passo troteado
Arrastando tudo de supetao
tudo vai sendo sugado aos poucos
por esse voraz turbilhao
Sera que isso e vida
Ou sera so uma ilusao?
by Renato de Oliveira
I have been living in England for a long time. I've learnt many good things here, my wife is English, my children are english. This is where I have been living my adult life. I would like to share IT knowledge and experience. If you can benefit from this blog, I will be happy.
Wednesday, 23 July 2014
SSH Passwordless or RSA key authentication
Log to a remote system using SSH without having to type the password.
This has few different names, such as: passwordless, RSA key authentication, key based auth etc.
Recently i was trying to implement a mechanism to save all logs under /var/log/ to a central server, just for keeping a record daily of these logs, in case we need to check things out at later date (security).
You will need to make some changes to the remote SSH server and the local SSH client.
To start with lets name two Linux Servers: Linux01 and Linux02.
You want to lot to Linux02 from Linux01 without having to type the password for a specific user, let's call it "user01".
Make sure the user exists on both Linux servers or at least on the remote Server (Linux02).
# adduser user01
# passwd user01
# su - user01
~ ssh-keygen
cat .ssh/id_rsa.pub | ssh user01@linux02 'cat >> .ssh/authorized_keys'
chmod 600 authorized_keys
by Renato de Oliveira
This has few different names, such as: passwordless, RSA key authentication, key based auth etc.
Recently i was trying to implement a mechanism to save all logs under /var/log/ to a central server, just for keeping a record daily of these logs, in case we need to check things out at later date (security).
You will need to make some changes to the remote SSH server and the local SSH client.
To start with lets name two Linux Servers: Linux01 and Linux02.
You want to lot to Linux02 from Linux01 without having to type the password for a specific user, let's call it "user01".
Make sure the user exists on both Linux servers or at least on the remote Server (Linux02).
# adduser user01
# passwd user01
# su - user01
~ ssh-keygen
cat .ssh/id_rsa.pub | ssh user01@linux02 'cat >> .ssh/authorized_keys'
chmod 600 authorized_keys
by Renato de Oliveira
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