Start single-user mode

Notice

Security risk

In the default setting, every user who has physical access to the Industrial PC has root rights and thus full control over the system. Restrict access to the Industrial PC to trusted persons.

Single-user mode grants full access to the local system and the configuration files and can be executed during system startup. Single-user mode is similar to safe mode under Windows and can be used for repair or data recovery, for example if a faulty process prevents a system start or a faulty TwinCAT project causes a boot loop.

In single-user mode you have no access to the network and no processes are running. Processes and the network can be started if required.

Proceed as follows:

1. During the bootup, press and hold the [Space bar]. The boot menu appears.

2. Select single-user mode with [2].
Start single-user mode 1:

3. The dataset zroot/ROOT/default is mounted automatically. All datasets can be mounted collectively with the command zfs mount -a, or the datasets can be mounted individually.

4. Enable the writing rights for the dataset zroot/ROOT/default with the command zfs set readonly=off zroot/ROOT/default in order to be able to make changes to the system.

You can exit single-user mode again with exit.