---
title: mount — Attach a filesystem
date: 2026-10-18
time: 12:00
model: admin
category: programs
author_type: human
summary: Command that attaches disks or network shares to a specific path and checks their status.
tags: program, File and disk management, mount
---

**💬 "mount command"**

mount connects a device or network share **to a directory**. The connection point is called a mount point.

It is also often used to view the current mount status.

- **Concept**: Connects a device (or remote share) to a directory.
- **Left argument**: A device path (e.g., /dev/vdc1) or a remote share (e.g., 10.0.0.5:/data).
- **Right argument**: The directory to connect to (mount point).
- **View status**: Running without arguments shows the current mount list.
## Commonly used options

| Option | Description |
| --- | --- |
| -t <type> | Specifies the filesystem type (ext4, nfs, xfs, etc.) |
| -o <options> | Specifies options (ro, noatime, noexec, etc.) |
| -a | Mounts all entries defined in /etc/fstab |
| --bind | Exposes an existing directory at another path as-is |

## 3 essential command combinations

- `mount | column -t | head` — Check the current mount status in column-aligned format
- `mount -o noexec,nosuid /dev/vdc1 /data` — Mount with security options
- `mount --bind /srv/app/public /var/www/html` — Connect a directory to the web root
**💬 "Show me how to find bottlenecks with this command"**

Here are common situations on production servers, organized in order.

### Step 1 · Check the device

Check the device and filesystem to mount.

```
lsblk -f /dev/vdc
```

### Step 2 · Prepare the mount point and connect

Create an empty directory and mount.

```
mkdir -p /data && mount /dev/vdc1 /data
```

### Step 3 · Persist after reboot

Add it to fstab and test.

```
grep /data /etc/fstab && mount -a
```

## In practice, it is used like this

### 1. Attaching a new data disk

**Situation** — You want to use a 500G volume as /data.

```
mkfs.ext4 /dev/vdc1 && mkdir -p /data && mount /dev/vdc1 /data
```

**Result** — When you enter /data, you see the contents of the new volume.

**Tip** — Formatting a device that has existing data makes recovery difficult. Check the device first with lsblk.

### 2. Exposing a deployment directory

**Situation** — The app uses /srv/app/public, but the web server root is /var/www/html.

```
mount --bind /srv/app/public /var/www/html
```

**Result** — The same content is visible at both paths without copying.

**Tip** — Bind mounts disappear on reboot, so add them to fstab or consider a symbolic link as well.

## Cautionary notes

- If you mount over a directory that already has files, those contents are hidden (not deleted). They can be recovered if needed.
- Incorrect fstab syntax can lead to boot failure. After editing, verify with mount -a.
- Network filesystems can hang on access during a network failure, so set timeout options.
- Formatting (mkfs) erases data. Never run it without confirming the device name.
## Actual execution screen

This is the result of checking the currently mounted filesystems and options.

![mount command execution result: mount list and options](https://games.aidebatehub.com/assets/mount-demo.png)

Production server

---
Source (HTML): https://games.aidebatehub.com/programs/linux/filesystem/mount.html
This file is an auto-generated Markdown twin of the DevHub document.