Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DDwfd6Ki8UfG4hK6W5YpJz
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#!/usr/bin/env bash
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# Provision the development Orin as the yukart org's Gitea Actions runner for Rust
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# services: native L4T builds whose binaries load on the car Orin.
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#
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# sudo ./scripts/setup-ci-runner.sh --check # pre-flight only, changes nothing
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# sudo RUNNER_TOKEN=xxxx ./scripts/setup-ci-runner.sh
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#
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# The token is ORG-scoped (yukart), from <gitea>/org/yukart/settings/actions/runners
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# or `POST /api/v1/orgs/yukart/actions/runners/registration-token`.
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# Re-running is safe: every step checks before it changes anything, and a registered
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# runner's config is left alone.
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#
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# Modelled on halogen's runners (android-stuff iperf3-gui tool/setup_ci_runner.sh):
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#
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# ── WHY HOST MODE ───────────────────────────────────────────────────────────
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# The point of building here is the sysroot: this unit runs the same L4T and
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# Ubuntu release as the car Orin, so a binary cannot reference a glibc symbol the
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# car lacks (project-yukart docs/REPOS.md). A container would build against
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# whatever image the workflow names and throw that away.
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#
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# ── WHY A DEDICATED USER, WITH ITS OWN TOOLCHAIN ───────────────────────────
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# In host mode the service account is the only sandbox: a workflow is code and runs
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# as this account. Not mikkeli (home, SSH keys, passwordless sudo), not root. Its
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# own rustup under its own HOME, so CI never shares or drifts with an interactive
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# install, and `rustup` can add components without shared-write tricks.
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set -euo pipefail
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VERSION="${RUNNER_VERSION:-3.3.0}"
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SHA256_ARM64="${RUNNER_SHA256:-afdad29640ce9c2a6979f292e18313e14a22d39ca5f66bdd0add6480590b38b6}"
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INSTANCE="${GITEA_INSTANCE:-http://pi5-16.local:3005}"
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RUNNER_USER="${RUNNER_USER:-gitea-runner}"
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RUNNER_HOME="${RUNNER_HOME:-/var/lib/gitea-runner}"
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CONFIG_DIR="$RUNNER_HOME/yukart"
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BIN="${RUNNER_BIN:-/usr/local/bin/gitea-runner}"
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UNIT_NAME="gitea-runner-yukart.service"
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UNIT="/etc/systemd/system/$UNIT_NAME"
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# Machine-named registration, as halogen-yukart is.
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RUNNER_NAME="${RUNNER_NAME:-$(hostname)-yukart}"
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# One label for the machine, one for what it can do: workflows ask for the capability.
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LABELS="${RUNNER_LABELS:-orin-nano-2:host,l4t-rust:host}"
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CHECK_ONLY=0
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[[ "${1:-}" == "--check" ]] && CHECK_ONLY=1
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[[ $EUID -eq 0 ]] || { echo "Run with sudo: sudo RUNNER_TOKEN=... $0" >&2; exit 1; }
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if [[ $CHECK_ONLY -eq 0 ]]; then
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: "${RUNNER_TOKEN:?set RUNNER_TOKEN to a yukart org registration token (see header)}"
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fi
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say() { printf '\n==> %s\n' "$1"; }
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# ── Pre-flight ──────────────────────────────────────────────────────────────
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say "Pre-flight"
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[[ "$(uname -m)" == aarch64 ]] || { echo "not aarch64: this is the wrong machine" >&2; exit 1; }
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head -1 /etc/nv_tegra_release 2>/dev/null | sed 's/^/ /' || echo " (no /etc/nv_tegra_release)"
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ldd --version | sed -n "1s/^/ /p"
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missing=0
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# node runs the JavaScript actions (actions/checkout) in host mode; objdump is what
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# scripts/check-glibc.sh reads; cc links, and builds C dependencies (zstd-sys).
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for cmd in node git curl cc objdump pkg-config sha256sum; do
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if PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin command -v "$cmd" >/dev/null; then
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printf ' ok %s\n' "$cmd"
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else
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printf ' MISSING %s (not on systemd default PATH)\n' "$cmd"
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missing=1
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fi
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done
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if ! curl -fsS -o /dev/null "$INSTANCE/api/v1/version"; then
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printf ' MISSING %s unreachable\n' "$INSTANCE"
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missing=1
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fi
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if [[ $missing -ne 0 ]]; then
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echo "Refusing to register: a runner advertising these labels must actually build." >&2
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exit 1
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fi
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if [[ $CHECK_ONLY -eq 1 ]]; then
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say "Pre-flight passed; nothing was created. Re-run with RUNNER_TOKEN set to provision."
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exit 0
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fi
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# ── Service account ─────────────────────────────────────────────────────────
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say "Service account: $RUNNER_USER"
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if id "$RUNNER_USER" &>/dev/null; then
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echo " exists"
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else
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# A shell, not nologin: host-mode steps run as shell scripts. No password, so
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# the account is only reachable through root.
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useradd --system --create-home --home-dir "$RUNNER_HOME" --shell /bin/bash \
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--comment "Gitea Actions runner (yukart, l4t-rust)" "$RUNNER_USER"
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echo " created"
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fi
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install -d -o "$RUNNER_USER" -g "$RUNNER_USER" -m 0750 "$RUNNER_HOME" "$CONFIG_DIR" "$CONFIG_DIR/workspace"
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id "$RUNNER_USER"
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# ── Rust toolchain, the account's own ──────────────────────────────────────
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say "Rust toolchain for $RUNNER_USER"
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as_runner() { sudo -u "$RUNNER_USER" env HOME="$RUNNER_HOME" CARGO_HOME="$RUNNER_HOME/.cargo" \
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RUSTUP_HOME="$RUNNER_HOME/.rustup" PATH="$RUNNER_HOME/.cargo/bin:/usr/bin:/bin" "$@"; }
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if as_runner sh -c 'command -v rustup' >/dev/null 2>&1; then
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as_runner rustup update stable --no-self-update | tail -1
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else
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as_runner sh -c 'curl -fsSL https://sh.rustup.rs | sh -s -- -y --profile minimal --no-modify-path'
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fi
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as_runner rustup component add clippy rustfmt
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as_runner rustc --version
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as_runner cargo --version
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# ── Binary ──────────────────────────────────────────────────────────────────
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say "gitea-runner $VERSION"
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if [[ -x "$BIN" ]] && "$BIN" --version 2>/dev/null | grep -qF "$VERSION"; then
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echo " already at $VERSION"
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else
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url="https://dl.gitea.com/gitea-runner/${VERSION}/gitea-runner-${VERSION}-linux-arm64"
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echo " $url"
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curl -fSL --retry 3 -o "$BIN.tmp" "$url"
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echo "$SHA256_ARM64 $BIN.tmp" | sha256sum -c --quiet || { rm -f "$BIN.tmp"; echo "checksum mismatch" >&2; exit 1; }
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chmod 0755 "$BIN.tmp"
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mv "$BIN.tmp" "$BIN"
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fi
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"$BIN" --version
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# ── Config and registration ─────────────────────────────────────────────────
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say "Config: $CONFIG_DIR/config.yaml"
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CONFIG="$CONFIG_DIR/config.yaml"
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if [[ -f "$CONFIG_DIR/.runner" ]]; then
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echo " registered already — leaving config and registration alone"
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else
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yaml_labels=$(tr ',' '\n' <<<"$LABELS" | sed 's/.*/ - "&"/')
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cat > "$CONFIG" <<YAML
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log:
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level: info
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runner:
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# Absolute: register resolves a relative path against the caller's directory.
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file: ${CONFIG_DIR}/.runner
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# One job at a time: 6 cores and 8 GB, and a release build of a service uses them all.
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capacity: 1
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timeout: 45m
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# ':host' runs steps on this machine as ${RUNNER_USER}: the L4T sysroot is the point.
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labels:
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${yaml_labels}
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container:
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network: ""
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privileged: false
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host:
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workdir_parent: ${CONFIG_DIR}/workspace
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YAML
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chown "$RUNNER_USER:$RUNNER_USER" "$CONFIG"
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sudo -u "$RUNNER_USER" env HOME="$RUNNER_HOME" "$BIN" register --no-interactive \
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--config "$CONFIG" --instance "$INSTANCE" --token "$RUNNER_TOKEN" \
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--name "$RUNNER_NAME" --labels "$LABELS"
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fi
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# ── Service ─────────────────────────────────────────────────────────────────
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say "Service: $UNIT_NAME"
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cat > "$UNIT" <<UNIT
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[Unit]
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Description=Gitea Actions runner (l4t-rust for the yukart org, host mode)
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Documentation=https://gitea.com/gitea/runner
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After=network-online.target
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Wants=network-online.target
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[Service]
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Type=simple
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User=${RUNNER_USER}
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Group=${RUNNER_USER}
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WorkingDirectory=${CONFIG_DIR}
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ExecStart=${BIN} daemon --config ${CONFIG}
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Restart=always
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RestartSec=5
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Environment=HOME=${RUNNER_HOME}
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Environment=CARGO_HOME=${RUNNER_HOME}/.cargo
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Environment=RUSTUP_HOME=${RUNNER_HOME}/.rustup
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Environment=PATH=${RUNNER_HOME}/.cargo/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
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[Install]
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WantedBy=multi-user.target
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UNIT
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systemctl daemon-reload
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systemctl enable --now "$UNIT_NAME"
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sleep 2
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systemctl --no-pager --lines=5 status "$UNIT_NAME"
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