added nfs document

Storage/NFS/setup.md

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+# 📡 NFS Server & Client Setup Guide (Ubuntu)
+
+Easily set up a Network File System (NFS) for sharing files between Linux systems on the same network.
+
+---
+
+## 🖥️ Server Configuration (Ubuntu)
+
+### 1. Install NFS Kernel Server
+
+Install the required package:
+
+```bash
+sudo apt update
+sudo apt install nfs-kernel-server
+```
+
+### 2. Create a Shared Directory
+
+Replace `<shared-directory>` with your preferred path:
+
+```bash
+sudo mkdir -p <shared-directory>
+sudo chown nobody:nogroup <shared-directory>
+sudo chmod 777 <shared-directory>
+```
+
+> ✅ *Best practice:* Use a dedicated directory for NFS shares, e.g., `/srv/nfs/shared`.
+
+### 3. Configure NFS Exports
+
+Create an exports configuration file:
+
+```bash
+sudo vim /etc/exports.d/shared.exports
+```
+
+Add the following line (update paths and IPs accordingly):
+
+```
+<shared-directory> <client-ip>(rw,sync,no_root_squash,no_subtree_check)
+```
+
+> 💡 **Notes:**  
+> - `<shared-directory>`: Full path to the directory you want to share  
+> - `<client-ip>`: IP address of the client allowed to access the share  
+
+### 4. Apply Export Changes
+
+```bash
+sudo exportfs -ra
+```
+
+### 5. Enable and Restart NFS Service
+
+```bash
+sudo systemctl enable nfs-server
+sudo systemctl restart nfs-server
+```
+
+---
+
+## 💻 Client Configuration (Ubuntu)
+
+### 1. Install NFS Client Packages
+
+```bash
+sudo apt update
+sudo apt install nfs-common rpcbind
+```
+
+### 2. Create a Mount Point
+
+Choose a local directory to mount the share (e.g., `/mnt/nfs`):
+
+```bash
+sudo mkdir -p <mount-point>
+sudo chmod 777 <mount-point>
+```
+
+### 3. Mount the NFS Share (Temporary)
+
+```bash
+sudo mount -t nfs <server-ip>:<shared-directory> <mount-point>
+```
+
+> Example:  
+> `sudo mount -t nfs 192.168.0.10:/srv/nfs/shared /mnt/nfs`
+
+### 4. Enable Auto-Mount at Boot
+
+Edit the fstab file:
+
+```bash
+sudo vim /etc/fstab
+```
+
+Add this line:
+
+```
+<server-ip>:<shared-directory> <mount-point> nfs defaults 0 0
+```
+
+> Example:  
+> `192.168.0.10:/srv/nfs/shared /mnt/nfs nfs defaults 0 0`
+
+### 5. Verify and Reload Mounts
+
+```bash
+sudo mount -a
+```
+
+---
+
+## ✅ Final Checklist
+
+- 🔄 NFS server and client packages installed  
+- 📁 Shared and mount directories properly set  
+- 🔐 Permissions and access IPs correctly configured  
+- ⚙️ Auto-mount enabled with `/etc/fstab`  
+