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178 Operating System
WAGO-I/O-SYSTEM 750
758-874/000-131
WAGO-I/O-IPC-C6
Manual
Version 1.0.0
14.2
Grand Unified Bootloader (GRUB)
GRUB is used as the bootloader for the I/O-IPC. To change the start settings of
the Linux kernel, press one of the following keys within the waiting time you
have set during the start phase of GRUB:
•
A key on the keyboard connected to the I/O-IPC
•
In the case of an opened terminal program, a key on the PC keyboard
Figure 101: Serial console "hyperterminal"
In the GRUB, you have a choice of two start settings for the Linux file system:
• WAGO
Starting of the Linux file system from the internal flash memory.
• WAGO_NFS
Starting of the Linux file system from a remote NFS partition, to be defined.
To alter the bootstring (transfer parameters in the kernel), press the E key on the
keyboard. This will enable you to determine a fixed IP address under
IP=
or to set
the resolution of the monitor connected to the I/O-IPC under
VGA=
.
The change to the startup behavior is not saved permanently. If this behavior is to
be permanently saved, the file
/boot/grub/menu.lst
in the Linux file system must
be altered.
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