問題：我的 NFS 伺服器無法在啟動時匯出目錄。啟動後，我可以透過 ssh 登入並手動啟動伺服器。我已將所有所有者：群組和權限設定為非常“寬鬆”，以避免任何權限問題，當我解決問題時，這些將被鎖定。
注意：無法從我的區域網路外部存取該伺服器。
systemctl status nfs-kernel-server.service 的輸出
● nfs-server.service - NFS server and services
Loaded: loaded (/lib/systemd/system/nfs-server.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Mon 2023-02-20 10:22:36 GMT; 27min ago
Process: 303 ExecStartPre=/usr/sbin/exportfs -r (code=exited, status=1/FAILURE)
Feb 20 10:22:36 file-server systemd[1]: Starting NFS server and services...
Feb 20 10:22:36 file-server exportfs[303]: exportfs: Failed to stat /shared/Documents: No such file or directory
Feb 20 10:22:36 file-server exportfs[303]: exportfs: Failed to stat /shared/Downloads: No such file or directory
Feb 20 10:22:36 file-server exportfs[303]: exportfs: Failed to stat /shared/Video: No such file or directory
Feb 20 10:22:36 file-server systemd[1]: nfs-server.service: Control process exited, code=exited status=1
Feb 20 10:22:36 file-server systemd[1]: Failed to start NFS server and services.
Feb 20 10:22:36 file-server systemd[1]: nfs-server.service: Unit entered failed state.
Feb 20 10:22:36 file-server systemd[1]: nfs-server.service: Failed with result 'exit-code'.
執行 systemctl start nfs-kernel-server.service 後
systemctl status nfs-kernel-server.service 的輸出
● nfs-server.service - NFS server and services
Loaded: loaded (/lib/systemd/system/nfs-server.service; enabled; vendor preset: enabled)
Active: active (exited) since Mon 2023-02-20 10:51:34 GMT; 1min 4s ago
Process: 735 ExecStart=/usr/sbin/rpc.nfsd $RPCNFSDARGS (code=exited, status=0/SUCCESS)
Process: 732 ExecStartPre=/usr/sbin/exportfs -r (code=exited, status=0/SUCCESS)
Main PID: 735 (code=exited, status=0/SUCCESS)
Feb 20 10:51:33 file-server systemd[1]: Starting NFS server and services...
Feb 20 10:51:34 file-server systemd[1]: Started NFS server and services.
所以我可以手動啟動該服務，但它不會在啟動時啟動。
伺服器資訊：
IP 位址 - 192.168.1.200（由 DHCP 分配，路由器上保留的 IP）
sda ext4 在啟動時安裝為 / 和交換
sdb ext4 啟動時安裝為 /shared
/etc/fstab
#sda1
UUID=4c5189b4-6ed8-416a-9b45-d7a8cb7d1f76 / ext4 errors=remount-ro 0 1
#sda2
UUID=85704cdf-46ff-4a71-83a0-deebf37f9f82 none swap sw 0 0
#sdb1
UUID=98c91985-fe1b-43d0-8c62-a6edb9184a35 /shared ext4 nofail,sync,auto,noexec,nosuid,rw,nouser 1 2
/etc/出口
/shared/Video 192.168.1.0/24(rw,sync,no_subtree_check)
/shared/Downloads 192.168.1.0/24(rw,sync,no_subtree_check)
/shared/Documents 192.168.1.0/24(rw,sync,no_subtree_check)
掛載點的擁有者/權限 (/shared)
drwxrwxrwx 7 nobody nogroup 4096 Aug 18 2022 /shared/
/shared/* 的所有者/權限
drwxrwxrwx 27 nobody nogroup 12288 Jan 26 19:45 /shared/Documents/
drwxrwxrwx 25 nobody nogroup 4096 Aug 18 2022 /shared/Downloads/
drwx------ 2 root root 16384 Aug 18 2022 /shared/lost+found/
drwxrwxrwx 162 nobody nogroup 12288 Feb 4 15:03 /shared/Video/
（顯然lost+found不是共享的。所有者：群組和權限是遞歸設定的）
我可以提供所需的任何附加資訊。