First of all, the users to know if they can connect graphically to the cluster.

fbartu@levy:~$ xhost + access control disabled, clients can connect from any host fbartu@levy:~$ ssh -X fbartu@cluster-ceab.ceab.csic.es Welcome to Ubuntu 16.04.3 LTS (GNU/Linux 4.4.0-96-generic x86_64)

• Documentation: https://help.ubuntu.com
• Management: https://landscape.canonical.com
• Support: https://ubuntu.com/advantage

153 packages can be updated. 2 updates are security updates.

New release '18.04.2 LTS' available. Run 'do-release-upgrade' to upgrade to it.

Last login: Mon Apr 15 16:23:35 2019 from 161.111.254.6

fbartu@cluster-ceab:~$ qlogin -l h_vmem=10G -pe make 5 local configuration cluster-ceab not defined - using global configuration Your job 65193 (“QLOGIN”) has been submitted waiting for interactive job to be scheduled … Your interactive job 65193 has been successfully scheduled. Establishing builtin session to host node108 … groups: cannot find name for group ID 20005 fbartu@node108:~$ export DISPLAY=161.111.254.6:1 fbartu@node108:~$ export DISPLAY=161.111.254.6:0 fbartu@node108:~$ xeyes fbartu@node108:~$ /home/soft/matlab/R2010b2/bin/matlab