accessing.md

# Before You Access

!!! warning
    GPUs are single-user devices. Memories of each GPU are not purged between job runs. Furthermore, they can be read (but not written) by any user at any time. Consider the confidentiality of your running jobs.

# Shell Access

The DGX-2 can be accessed by SSH protocol via login node ldgx at the address `ldgx.it4i.cz`.

```console
 _   ___     _____ ____ ___    _        ____   ______  __    ____
| \ | \ \   / /_ _|  _ \_ _|  / \      |  _ \ / ___\ \/ /   |___ \
|  \| |\ \ / / | || | | | |  / _ \     | | | | |  _ \  /_____ __) |
| |\  | \ V /  | || |_| | | / ___ \    | |_| | |_| |/  \_____/ __/
|_| \_|  \_/  |___|____/___/_/   \_\   |____/ \____/_/\_\   |_____|

                                ...running on Ubuntu 18.04 (DGX-2)

[kru0052@ldgx ~]$
```

## Authentication

Authentication is available by private key only.

!!! info
    Should you need access to the DGX-2 machine, request it at support@it4i.cz.

## Data Transfer

Data in and out of the system may be transferred by the SCP protocol.

!!! warning
    /HOME directory on ldgx is not the same as /HOME directory on dgx. /SCRATCH storage is shared between login node and DGX-2 machine.