Password less SSH login to another server can be very useful when you want to configure a remote backup server or when migrating servers. For enabling this you need to have openSSH installed on the server. Here is a tutorial on how to configure password less SSH login to server ‘mars’ from server ‘earth’

1. Login to earth as root.

3. Change directory to /root/.ssh/

root@earth:~# cd /root/.ssh/
root@earth:~/.ssh#

4. Copy the contents of the file id_rsa.pub to the directory /root/.ssh/authorized_keys
scp -P id_rsa.pub root@mars_server_IP:/root/.ssh/authorized_keys

5. You will be able to login to the remote server ‘mars’ by typing ssh root@mars_server_IP -p without password nowRead more..

Linux files systems work great. Especially ext3 is a mature file system and very robust. With journaling turned the filesystems stays consistent also on an unexpected power loss or system crash (wich normally never happens on linux  ) and you don’t need long disk checks to repair the file system in such a case. There is almost no disk fragmentation and a lot of more cool features … But the best linux feature is: if you remove a file or directory it’s gone. It’s not moved to trash, its not marked as deleted, there are no annoying messageboxes, it just does what you say. I love that!
But from time to time also experienced users make mistakes and you delete something wrong. As Murphy’s law says: “if anything can go wrong it will” and so you will not have a copy of the deleted files and the backup will be outdated. So what to do now?
I want to explain the procedure by using the problem I had as example.

How the trouble came up for me

As usual I was working on my Gentoo Linux laptop. I just wanted to add a new folder with sources to my subversion repository. I wanted to add first the folder, then some files within the folder…Read more..