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---
lastproofread: '2025-11-19'
---
(information)=
# System Information
VyOS features a rich set of operational level commands to retrieve arbitrary
information about your running system. For more information on the VyOS command
line interface (CLI), see {ref}`cli`.
# Hardware
(hardware_usb)=
## USB
In the past, serial interfaces were defined as `ttySx` and `ttyUSBx` where
`x` was the instance number. However, the mapping of USB-based
serial interfaces can change from one system boot to another, depending on
which driver the operating system loads first.
This inconsistency can be problematic when you
use multiple serial interfaces.
For example, both console-server connections and a serial-backed
{ref}`wwan-interface`.
To address this issue, and because many low-cost USB-to-serial converters
do not have a programmed serial number, VyOS now identifies USB-to-serial
interfaces by the USB root bridge and the bus they connect to.
This approach is similar to the network interface naming conventions used in
recent Linux distributions.
```{opcmd} show hardware usb
Retrieve a tree-like representation of all connected USB devices.
:::{note}
If a device is unplugged and plugged in again, it is assigned a new
``Port``, ``Dev``, and ``If``.
:::
```
```{opcmd} show hardware usb serial
Retrieve a list and description of all connected USB serial devices. The
device name displayed, (for example ``usb0b2.4p1.0``), can be used
directly when accessing the serial console as console-server device.
```
(information-version)=
# Version
```{opcmd} show version
Return the currently running VyOS version and build information. This
includes the name of the release train, e.g., ``sagitta`` on VyOS 1.4,
and ``circinus`` on VyOS 1.5.
:::{code-block} none
vyos@vyos:~$ show version
Version: VyOS 1.4-rolling-202106270801
Release Train: sagitta
Built by: autobuild@vyos.net
Built on: Sun 27 Jun 2021 09:50 UTC
Build UUID: ab43e735-edcb-405a-9f51-f16a1b104e52
Build Commit ID: f544d75eab758f
Architecture: x86_64
Boot via: installed image
System type: KVM guest
Hardware vendor: QEMU
Hardware model: Standard PC (i440FX + PIIX, 1996)
Hardware S/N:
Hardware UUID: Unknown
Copyright: VyOS maintainers and contributors
:::
```
```{opcmd} show version kernel
Return the version number of the currently running Linux kernel.
:::{code-block} none
vyos@vyos:~$ show version kernel
5.10.46-amd64-vyos
:::
```
```{opcmd} show version frr
Return the version number of FRR (Free Range Routing - <https://frrouting.org/>)
used in this release. This is the routing control plane and a successor to GNU
Zebra and Quagga.
:::{code-block} none
vyos@vyos:~$ show version frr
FRRouting 7.5.1-20210625-00-gf07d935a2 (vyos).
Copyright 1996-2005 Kunihiro Ishiguro, et al.
:::
```
|
