Contents
Access
The access to LIP FARM it's done by ssh with public key to a remote machine based on RedHat: pauli.ncg.ingrid.pt
- The pauli machine it's a cluster and it's composed by several machines: pauli01, pauli02, .... The access it's based on round-robin meaning for consecutive logins the users will be redirected to a different machine.
host pauli.ncg.ingrid.pt pauli.ncg.ingrid.pt has address 193.136.75.169 pauli.ncg.ingrid.pt has address 193.136.75.174 pauli.ncg.ingrid.pt has address 193.136.75.176 ....
For outside access users should always use the lnlip01/02 under lip.pt domain.
Authentication: ssh + key
- The authentication for the LIP FARM it's done exclusively trough ssh with public key.
- In order to generate a pair of private/public keys the user should run in there local machine the ssh-keygen command.
IMPORTANT : please choose a good password
$ ssh-keygen -b 4096 Generating public/private rsa key pair. Enter file in which to save the key (/home/username/.ssh/id_rsa): Created directory '/home/username/.ssh'. Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /home/username/.ssh/id_rsa. Your public key has been saved in /home/username/.ssh/id_rsa.pub. The key fingerprint is: a8:60:b3:73:aa:ed:7f:bf:88:32:7a:fc:9d:00:1d:1d username@mydesktop The key's randomart image is: +--[ RSA 2048]----+ | E | | . . | | . . | | . . . | | = . . S | | . = . | | .o + | | .=+ +.o | |o=+=+.+.o. | +-----------------+
By default the pair of keys generated by ssh-keygen command will be created in the ~/.ssh/ folder. Never share your private key (id_rsa)!!!
cd ls -l ~/.ssh/ total 8 -rw------- 1 username group 1743 Feb 19 10:52 id_rsa -rw-r--r-- 1 username group 404 Feb 19 10:52 id_rsa.pub
Finally you should send the id_rsa.pub to helpdesk@lip.pt together with your username and corresponding group.
Login
ssh -A -l username pauli.ncg.ingrid.pt