Login servers
Login servers
There are three login servers available to access resources within JASMIN.
Users with the jasmin-login
access role can access the following servers via
SSH:
Login server name | details |
---|---|
login1.jasmin.ac.uk | best for use from university networks (requires fwd/reverse DNS lookup to domain in allow-list) |
login2.jasmin.ac.uk | Contingency config, see notes below |
login3.jasmin.ac.uk | as per login1 |
login4.jasmin.ac.uk | as per login1 |
See also How to login and other articles in the Getting started category.
See also NoMachine NX service which provides login to a graphical Linux desktop, rather than a single terminal window.
Login servers have minimal resources and software installed. They provide:
/home/users/<username>
).There are requirements on your local network which apply to accessing the login servers and the transfer
servers via SSH. If you cannot meet these
requirements, even after discussion with your local network admin team, a
contingency route is provided in the form of login server
login2.jasmin.ac.uk
However, you will be limited in what you can access within JASMIN from this server. Specifically:
xfer[1,2].jasmin.ac.uk
via SSH directly from an external host.login2
, but can then only initiate an inward pull of data from an external SSH server, if available at your institution. You cannot push data directly to xfer[1,2].jasmin.ac.uk
via SSH from outside in this case.xfer3.jasmin.ac.uk
is provided with equivalent configuration to login2
. This should provide what you need for direct SSH transfers from outside, but you will need the additional "xfer-sp"
access role in in this case: see here for further details.For full details of how to log in, including making onward connections to other machines, please see the article “How to login”.
Users are not permitted to execute commands which require
administrative privileges. This applies to all hosts in the managed part of
JASMIN where users have SSH login access (for example login
, nx-login
,
sci
, xfer
and hpxfer
machines).
In other words, the use of su
and sudo
is not permitted.
Please be careful when typing commands,
particularly if you have multiple terminal windows open on your own computer,
that you do not accidentally attempt sudo
on a JASMIN machine: expect some
follow-up from the JASMIN team if you do!