认识
官网：https://linux-nfs.org/
文档：
组成
nfs-utils
Both client and server only require the installation of the nfs-utils package.
服务端配置 | 配置文件路径 | Server Configuration
不同 Linux 发行版组织 NFS 服务的方式并不相同，建议阅读发行版手册，以了解配置文件的详细路径。
for Ubuntu 20.04 | Ubuntu/Network File System (NFS)
/etc/default/nfs/kernel-server
for Ubuntu 22.04 | Ubuntu/Network File System (NFS)
/etc/nfs.conf.d/：其中的 *.conf 文件将覆盖 nfs.conf 的配置；
Ubuntu/Network File System (NFS) 文档，以获取更多细节信息。
构建
https://nfs.sourceforge.net/nfs-howto/
on Ubuntu 25.04
现在 NFS 实现及工具很多，我们感到困惑，所以我们尝试弄清楚部署的到底是哪个版本。
libnfsidmap1 https://linux-nfs.org/
libnfsidmap-dev https://linux-nfs.org/
libnfsidmap-regex https://linux-nfs.org/
nfs4-acl-tools http://linux-nfs.org/
nfs-common https://linux-nfs.org/
nfs-kernel-server https://linux-nfs.org/
nfsometer https://wiki.linux-nfs.org/wiki/index.php/NFSometer
nfstest https://wiki.linux-nfs.org/wiki/index.php/NFStest
应用
查看所有已连接客户端 Finding NFS Clients
How to get the list of clients connected to an NFS server within a local network?
man 8 showmount
为了进行某些变更操作，我们需要查看所有挂载 NFS 服务的客户端。
官网手册并不建议使用 showmount -a 命令，因为结果并不可靠。Note, however, that there is little to guarantee that the contents of /var/lib/nfs/rmtab are accurate. A client may continue accessing an export even after invoking UMNT. If the client reboots without sending a UMNT request, stale entries remain for that client in /var/lib/nfs/rmtab.
使用 netstat 命令，查看已建立的连接，能够得到准确结果：
netstat -an | grep 2049
参考
ArchWiki / NFS / https://wiki.archlinux.org/title/NFS
官方文档
linux-nfs.org / Main Page
https://linux-nfs.org/wiki/index.php/Main_Page
Linux NFS Overview, FAQ and HOWTO Documents
https://nfs.sourceforge.net/
Ubuntu / NFSv4Howto
https://help.ubuntu.com/community/NFSv4Howto?_ga=2.96445276.1120247715.1700808114-1443535799.1696832186
Ubuntu / SettingUpNFSHowTo
https://help.ubuntu.com/community/SettingUpNFSHowTo?_ga=2.96445276.1120247715.1700808114-1443535799.1696832186