systemctl 無法訪問服務文件，權限被拒絕

在 Fedora 35 上，我創建了自己的服務來安排備份。我在 /usr/local/bin/ 中有腳本，在 /lib/systemd/system/ 中有服務文件和計時器

ls -an /usr/local/bin/ 列印

-rwxr--r--. 1 0 0 3360 Dec 1 18:31 backup.sh

ls -an /lib/systemd/system/schedule-backup_root*

-rw-r--r--. 1 0 0 230 Dec  1 18:14 /lib/systemd/system/schedule-backup_root.service
-rw-r--r--. 1 0 0 388 Dec  1 16:49 /lib/systemd/system/schedule-backup_root.timer

但是當我啟動服務 systemctl start schedule-backup_root.service

Dec 01 18:36:13 fallen-robot systemd[1]: Started Nightly snapshot backup job for ROOT volume.
Dec 01 18:36:13 fallen-robot systemd[75159]: schedule-backup_root.service: Failed to locate executable /usr/local/bin/backup.sh: Permission denied
Dec 01 18:36:13 fallen-robot systemd[75159]: schedule-backup_root.service: Failed at step EXEC spawning /usr/local/bin/backup.sh: Permission denied
Dec 01 18:36:13 fallen-robot systemd[1]: schedule-backup_root.service: Main process exited, code=exited, status=203/EXEC
Dec 01 18:36:13 fallen-robot systemd[1]: schedule-backup_root.service: Failed with result 'exit-code'.

我的服務文件如下所示：

[Unit]
Description=Nightly snapshot backup job for ROOT volume

[Service]
Type=simple
ExecStart=/usr/local/bin/backup.sh -s / -b /run/media/borko/BackupTest/ -t "Fallen Robot ROOT Backup Report"

[Install]
WantedBy=default.target

為什麼它無法訪問該文件？

禁用 SElinux 或將其設置為 permissive。

setenforce 0

這將暫時禁用它。禁用後再次測試，看看是否能解決問題。

引用自：https://unix.stackexchange.com/questions/679861