SSH [PhD community wiki @ IGE]

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====== SSH ======

<note>SSH is an internet protocol that lets you connect to a remote computer, for instance your lab's computer :)</note>

There is a [[https://intragere.univ-grenoble-alpes.fr/IntraGere?CODE=0J2P$FfD1F105|doc]] in intragere, quickly summarized for *NIX environment hereafter.

First, you have to know the IP adresse of your computer. In a terminal, enter

  ip a

It should return something like

  1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
      link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
      inet 127.0.0.1/8 scope host lo
         valid_lft forever preferred_lft forever
      inet6 ::1/128 scope host 
         valid_lft forever preferred_lft forever
  2: enp0s25: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
      link/ether 34:64:a9:d1:2c:fb brd ff:ff:ff:ff:ff:ff
      inet 152.77.132.162/24 brd 152.77.132.255 scope global dynamic enp0s25
         valid_lft 28304sec preferred_lft 28304sec
      inet6 fe80::3664:a9ff:fed1:2cfb/64 scope link 
         valid_lft forever preferred_lft forever
  3: wlo1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
      link/ether be:a0:2c:8f:12:ec brd ff:ff:ff:ff:ff:ff

We are looking for the ethernet adresse (namely ''enp0s5'' in this case, but could be ''eth0'' or other): ''152.77.132.162'' (it should start with ''152.77.'')


Then, the IGE use a ssh passerelle, so we need to use it each time. For instance, with this config in ''~/.ssh/config'' (replace //login// by your login):

  Host 152.77.132.162
      ProxyCommand nohup ssh login@ssh.ige-grenoble.fr nc -w1 %h %p

Then, to open a ssh connection, in a terminal enter:

  ssh login@152.77.132.162

<note tip>You may want to setup an ssh key in order not to enter your password every time... There are plenty of tutorial on how to do it (https://www.digitalocean.com/community/tutorials/how-to-set-up-ssh-keys-on-debian-10 for instance).</note>