criação de utilizador com home na ram

useradd aluno -m -d /dev/shm/aluno -c 'Utilizador aluno' -s /bin/bash
nano /etc/systemd/system/mkhomedir_helper.service

e introduzir o texto

[Unit]
Description=Run mkhomedir_helper to generate the /home from /etc/skel.
[Service]
ExecStart=/usr/sbin/mkhomedir_helper aluno
[Install]
WantedBy=graphical.target

ativar o serviço:
systemctl enable --now mkhomedir_helper

erro ao entrar no tinkercad

[ 1058.759]
X.Org X Server 1.21.1.16
X Protocol Version 11, Revision 0
[ 1058.759] Current Operating System: Linux administrador-hpcompaqdc7800psmallformfactor 6.12.43+deb13-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.43-1 (2025-08-27) x86_64
[ 1058.759] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-6.12.43+deb13-amd64 root=UUID=0a5a8695-8694-4d2f-9ef5-a45bd58b474f ro quiet splash resume=UUID=59c9fcd9-a1ed-411c-bf42-32c382970e00
[ 1058.759] xorg-server 2:21.1.16-1.3 (https://www.debian.org/support)

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