Red Hat LINUX 7.2 - OFFICIAL LINUX CUSTOMIZATION GUIDE Guida di Installazione Scaricare il pdf (Pagina 65)

Chapter 3. Boot Process, Init, and Shutdown 65

• USE_DMA=1, where setting this to 1 enables DMA. However, with some chipsets and hard drive

combinations, DMA can cause data corruption. Check with your hard drive documentation or man-

ufacturer before enabling this.

• Multiple_IO=16, where a setting of 16 allows for multiple sectors per I/O interrupt. When en-

abled, this feature reduces operating system overhead by 30-50%. Use with caution.

• EIDE_32BIT=3 enables (E)IDE 32-bit I/O support to an interface card.

• LOOKAHEAD=1 enables drive read-lookahead.

• EXTRA_PARAMS= speciﬁes where extra parameters can be added.

3.3.1.11. /etc/sysconfig/hwconf

The /etc/sysconfig/hwconf ﬁle lists all the hardware that kudzu detected on your system, as well

as the drivers used, vendor ID and device ID information. The kudzu program detects and conﬁgures

new and/or changed hardware on a system. The /etc/sysconfig/hwconf ﬁle is not meant to be

manually edited. If you do edit it, devices could suddenly show up as being added or removed.

3.3.1.12. /etc/sysconfig/i18n

The /etc/sysconfig/i18n ﬁle sets the default language, such as:

LANG="en_US"

3.3.1.13. /etc/sysconfig/identd

The /etc/sysconfig/identd ﬁle is used to pass arguments to the identd daemon at boot time.

The identd daemon returns the username of processes with open TCP/IP connections. Some services

on the network, such as FTP and IRC servers, will complain and cause slow responses if identd is

not running. But in general, identd is not a required service, so if security is a concern, you should

not run it. For more information about what parameters you can use in this ﬁle, type man identd.

By default, the ﬁle contains no parameters.

3.3.1.14. /etc/sysconfig/init

The /etc/sysconfig/init ﬁle controls how the system will appear and function during bootup.

The following values may be used:

• BOOTUP= value , where value is one of the following:

• BOOTUP=color means the standard color boot display, where the success or failure of devices

and services starting up is shown in different colors.

• BOOTUP=verbose means an old style display, which provides more information than purely a

message of success or failure.

• Anything else means a new display, but without ANSI-formatting.

• RES_COL= value , where value is the number of the column of the screen to start status

labels. Defaults to 60.

• MOVE_TO_COL=

value , where value moves the cursor to the value in the RES_COL line.

Defaults to ANSI sequences output by echo -e.

1 2 ... 60 61 62 63 64 65 66 67 68 69 70 ... 281 282

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Red Hat LINUX 7.2 - OFFICIAL LINUX CUSTOMIZATION GUIDE Guida di Installazione Pagina 65