more docs updates

docs/linux/docker-mailserver.md

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+---
+sidebar_position: 1
+slug: /linux/docker-mailserver
+---
+
+# Docker Mailserver
+
+:::info
+// TODO:
+- install dockercompose
+- ...
+:::

docs/linux/niri/_category_.json

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+{
+    "position": 8,
+    "label": "Niri Guides",
+    "collapsible": true,
+    "collapsed": true,
+    "link": {
+        "type": "generated-index",
+        "description": "Guides all around Niri"
+    }
+  }

docs/linux/niri/index.md

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+---
+sidebar_position: 1
+slug: /linux/niri
+---
+
+# Overview

docs/linux/niri/setup.md

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+---
+sidebar_position: 2
+slug: /linux/niri/setup
+---
+
+# Setup

docs/linux/server-admin/_category_.json

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+{
+    "position": 8,
+    "label": "Server Admin",
+    "collapsible": true,
+    "collapsed": true,
+    "link": {
+        "type": "generated-index",
+        "description": "Guides Server Administration"
+    }
+  }

docs/linux/server-admin/drive-automount.md

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+---
+sidebar_position: 2
+slug: /linux/server-admin/drive-automount
+---
+
+# Adding an Automount Drive on Linux
+
+This guide explains how to configure a drive to automount at boot using `/etc/fstab`.
+
+---
+
+## Steps
+
+### 1. Identify the Drive
+
+List drives and partitions:
+
+```bash
+lsblk -f
+```
+
+Find the target partition (e.g., `/dev/sdc1`) and note its UUID:
+
+```bash
+blkid /dev/sdc1
+```
+
+### 2. Create a Mount Point
+
+Choose or create a directory where the drive will mount:
+
+```bash
+sudo mkdir -p /mnt/mydrive
+```
+
+### 3. Backup `/etc/fstab`
+
+Always back up before editing:
+
+```bash
+sudo cp /etc/fstab /etc/fstab.bak
+```
+
+### 4. Edit `/etc/fstab`
+
+Open `/etc/fstab` with an editor:
+
+```bash
+sudo nano /etc/fstab
+```
+
+Add a line with the drive's UUID, mount point, filesystem type, and options. Example for ext4:
+
+```
+UUID=your-uuid-here /mnt/mydrive ext4 defaults 0 2
+```
+
+Replace `your-uuid-here` with the actual UUID.
+
+### 5. Test the Configuration
+
+Mount all entries without rebooting:
+
+```bash
+sudo mount -a
+```
+
+Check if the drive is mounted:
+
+```bash
+df -h | grep /mnt/mydrive
+```
+
+:::danger
+If the test fails and you still reboot, the system will drop to emergency mode and manual intervention is required.
+
+**In that case SSH WON'T WORK**
+:::
+
+### 6. Reboot and Verify
+
+Reboot the system and confirm the drive automounts:
+
+```bash
+sudo reboot
+```
+
+After reboot:
+
+```bash
+mount | grep /mnt/mydrive
+```
+:::note
+- Use `defaults` for standard mount options.
+- For other filesystems (e.g., NTFS, FAT32), adjust filesystem type and options accordingly.
+- If mounting fails at boot, system may drop to emergency mode; always test with `mount -a` first.
+:::

docs/linux/server-admin/partition-and-filesystem.md

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+---
+sidebar_position: 1
+slug: /linux/server-admin/partition-and-filesystem
+---
+
+# Creating Partition Tables and Filesystems on Linux
+
+This guide covers creating partition tables and filesystems using command-line tools.
+
+---
+
+## 1. Identify the Disk
+
+List disks and partitions:
+
+```bash
+lsblk
+```
+
+Assume the target disk is `/dev/sdc`.
+
+---
+
+## 2. Create a Partition Table with `fdisk`
+
+Start fdisk:
+
+```bash
+sudo fdisk /dev/sdc
+```
+
+### Inside `fdisk`:
+
+- Create a new GPT partition table (recommended for disks >2TB):
+
+```
+g
+```
+- Create a new partition:
+```
+n
+```
+- Accept defaults for partition number, first sector, and last sector (full disk).
+
+- Write changes and exit:
+```
+w
+```
+
+---
+
+## 3. Format the Partition
+
+Assuming partition `/dev/sdc1`:
+
+- Create an ext4 filesystem:
+
+```bash
+sudo mkfs.ext4 /dev/sdc1
+```
+
+- For other filesystems:
+
+  - NTFS: `sudo mkfs.ntfs /dev/sdc1`
+  - FAT32: `sudo mkfs.vfat /dev/sdc1`
+
+---
+
+## 4. Verify the Filesystem
+
+```bash
+sudo blkid /dev/sdc1
+```
+
+Check UUID and filesystem type.
+
+---
+
+## 5. Mount the Partition
+
+Create mount point and mount:
+
+```bash
+sudo mkdir -p /mnt/mydrive
+sudo mount /dev/sdc1 /mnt/mydrive
+```
+
+Verify:
+
+```bash
+df -h | grep /mnt/mydrive
+```
+
+---
+
+## 6. Automount (Optional)
+
+Follow the **Adding an Automount Drive** guide to configure `/etc/fstab`.
+
+
+:::note
+- Creating new partition tables and filesystems will erase data on the disk.
+- Backup important data before proceeding.
+- Use GPT for disks larger than 2TB; MBR is limited to ~2TB.
+- Use `parted` or `gparted` for GUI or more advanced partitioning.
+:::