Valentin Barbolin

bash# man ekiga
NAME
Ekiga - SIP and H.323 Voice over IP and Videoconferencing for UN*X

SYNOPSIS
ekiga [-d level] [-c URL]

Следовательно

bash# ekiga -c "НОМЕР_ТЕЛЕФОНА@IP_SERVER_VOIP"

Жесть. Переделай на systemd.

vim /etc/systemd/system/backend.service

[Service]
ExecStart=/usr/bin/node /opt/backend/server.js
Restart=always
StandardOutput=syslog
StandardError=syslog
SyslogIdentifier=backend
User=root
Group=root
WorkingDirectory=/opt/backend

[Install]
WantedBy=multi-user.target

sudo systemctl daemon-reload
sudo systemctl start backend.service