documentation/docs/User-Guide_Armbian-Config/System.md

# System wide and admin settings


***

## Alternative kernels, headers, rolling updates, overlays


***

### Install alternative kernels
Switching between kernels might change functionality of your device. 

It might fail to boot!

**Command:** 
~~~
armbian-config --cmd SY201
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

### Install Linux headers
**Command:** 
~~~
armbian-config --cmd SY204
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

### Remove Linux headers
**Command:** 
~~~
armbian-config --cmd SY205
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

### Manage device tree overlays
**Command:** 
~~~
armbian-config --cmd SY210
~~~

**Author:** @viraniac @igorpecovnik

**Status:** Stable



***

### Select Odroid board configuration
**Command:** 
~~~
armbian-config --cmd SY300
~~~

**Author:** 

**Status:** Preview



***

### Edit the boot environment
This will open /boot/armbianEnv.txt file to edit
CTRL+S to save
CTLR+X to exit
would you like to continue?

**Command:** 
~~~
armbian-config --cmd SY010
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

## Install to internal media, ZFS, NFS, read-only rootfs


***

### Install to internal storage
**Command:** 
~~~
armbian-config --cmd SY001
~~~

**Author:** @igorpecovnik

**Status:** Preview



***

### ZFS filesystem - enable support
**Command:** 
~~~
armbian-config --cmd SY220
~~~

**Author:** @armbian

**Status:** Stable



***

### ZFS filesystem - remove support
**Command:** 
~~~
armbian-config --cmd SY221
~~~

**Author:** @armbian

**Status:** Stable



***

### Enable read only filesystem
This will enable Armbian read-only filesystem. Reboot is mandatory?


**Command:** 
~~~
armbian-config --cmd SY007
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

### Disable read only filesystem
This will disable Armbian read-only filesystem. Reboot is mandatory?


**Command:** 
~~~
armbian-config --cmd SY008
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

### Enable Network filesystem (NFS) support
**Command:** 
~~~
armbian-config --cmd NFS01
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

### Disable Network filesystem (NFS) support
**Command:** 
~~~
armbian-config --cmd NFS02
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

### Manage NFS Server


***

#### Enable network filesystem (NFS) daemon
**Command:** 
~~~
armbian-config --cmd NFS06
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

#### Configure network filesystem (NFS) daemon
**Command:** 
~~~
armbian-config --cmd NFS07
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

#### Remove network filesystem (NFS) daemon
**Command:** 
~~~
armbian-config --cmd NFS08
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

#### Show network filesystem (NFS) daemon clients
**Command:** 
~~~
armbian-config --cmd NFS09
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

### Manage NFS Client


***

#### Find NFS servers in subnet and mount shares
**Command:** 
~~~
armbian-config --cmd NFS21
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

## Manage SSH daemon options, enable 2FA


***

### Disable root login
**Command:** 
~~~
armbian-config --cmd SY101
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

### Enable root login
**Command:** 
~~~
armbian-config --cmd SY102
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

### Disable password login
**Command:** 
~~~
armbian-config --cmd SY103
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

### Enable password login
**Command:** 
~~~
armbian-config --cmd SY104
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

### Disable Public key authentication login
**Command:** 
~~~
armbian-config --cmd SY105
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

### Enable Public key authentication login
**Command:** 
~~~
armbian-config --cmd SY106
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

### Disable OTP authentication
**Command:** 
~~~
armbian-config --cmd SY107
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

### Enable OTP authentication
**Command:** 
~~~
armbian-config --cmd SY108
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

### Generate new OTP authentication QR code
**Command:** 
~~~
armbian-config --cmd SY109
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

### Show OTP authentication QR code
**Command:** 
~~~
armbian-config --cmd SY110
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

### Disable last login banner
**Command:** 
~~~
armbian-config --cmd SY111
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

### Enable last login banner
**Command:** 
~~~
armbian-config --cmd SY112
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

## Change shell, adjust MOTD


***

### Change shell system wide to BASH
This will switch system wide shell to BASH

**Command:** 
~~~
armbian-config --cmd SY005
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

### Change shell system wide to ZSH
This will switch system wide shell to ZSH

**Command:** 
~~~
armbian-config --cmd SY006
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

### Adjust welcome screen (motd)
**Command:** 
~~~
armbian-config --cmd SY009
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

## OS updates and distribution upgrades
**Status:** Active



***

### Enable Armbian firmware upgrades
This will enable Armbian kernel upgrades that are currently put on hold.

**Command:** 
~~~
armbian-config --cmd SY202
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

### Disable Armbian kernel upgrades
Disable Armbian kernel/firmware upgrades

**Command:** 
~~~
armbian-config --cmd SY203
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

### Switch system to rolling packages repository
This will switch OS to rolling releases.

**Command:** 
~~~
armbian-config --cmd SY206
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

### Switch system to stable packages repository
This will switch OS to stable releases

**Command:** 
~~~
armbian-config --cmd SY207
~~~

**Author:** @igorpecovnik

**Status:** Stable



***

### Enable automating Docker container base images updating
**Command:** 
~~~
armbian-config --cmd WTC001
~~~

**Author:** @armbian

**Status:** Stable



***

### Disable automating Docker container base images updating
**Command:** 
~~~
armbian-config --cmd WTC002
~~~

**Author:** @armbian

**Status:** Stable



***