35 lines
1.6 KiB
Bash
35 lines
1.6 KiB
Bash
installed_pkgs() { dpkg-query -W -f '${db:Status-Abbrev} ${Package}\n' 2>/dev/null | awk '$1 ~ /^.i/ {print $2}' | sort -u; }
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[ -e /sys/class/net/lab0 ] && refuse "an interface lab0 already exists; remove it first"
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if command -v nmcli >/dev/null; then
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systemctl is-active --quiet NetworkManager || refuse "NetworkManager is installed but not running; start it first"
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nmcli -g NAME connection show | grep -qx office && refuse "a NetworkManager profile office already exists; delete it first"
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nmcli -g connection.interface-name connection show 2>/dev/null | grep -qx lab0 && refuse "a NetworkManager profile for lab0 already exists; delete it first"
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else
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# Ubuntu Server: NetworkManager ships with every wired interface
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# unmanaged unless netplan hands it over, so the connection stays
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# with systemd-networkd.
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installed_pkgs >"$LAB_STATE/pkgs-before"
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pkg_install network-manager
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comm -13 "$LAB_STATE/pkgs-before" <(installed_pkgs) >"$LAB_STATE/pkgs-added"
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systemctl enable --now --quiet NetworkManager
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for i in $(seq 20); do nmcli general >/dev/null 2>&1 && break; sleep 0.5; done
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fi
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cat >/etc/systemd/system/le-lab-lab0.service <<'UNIT'
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[Unit]
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Description=Spare interface lab0 for a LINUXexpert practice lab
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Before=network-pre.target NetworkManager.service
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Wants=network-pre.target
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[Service]
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Type=oneshot
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RemainAfterExit=yes
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ExecStart=/bin/sh -c 'ip link show lab0 >/dev/null 2>&1 || ip link add lab0 type dummy'
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ExecStop=/bin/sh -c 'ip link del lab0 2>/dev/null || true'
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[Install]
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WantedBy=multi-user.target
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UNIT
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systemctl daemon-reload
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systemctl enable --now --quiet le-lab-lab0.service
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