- Fix identation for the document title;
- use monotonic fonts for paths;
- use quote blocks where needed;
- adjust spaces to properly format paragraphs;
- use :menuselection: for the menu item;
- add it to the user book.
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx>
---
Documentation/serial-console.txt | 66 +++++++++++++++++++----------------
Documentation/user/index.rst | 1 +
Documentation/user/serial-console.rst | 1 +
3 files changed, 37 insertions(+), 31 deletions(-)
create mode 120000 Documentation/user/serial-console.rst
diff --git a/Documentation/serial-console.txt b/Documentation/serial-console.txt
index 9a7bc8b3f479..1d9a3e48e929 100644
--- a/Documentation/serial-console.txt
+++ b/Documentation/serial-console.txt
@@ -1,15 +1,19 @@
- Linux Serial Console
+Linux Serial Console
+====================
To use a serial port as console you need to compile the support into your
kernel - by default it is not compiled in. For PC style serial ports
-it's the config option next to "Standard/generic (dumb) serial support".
+it's the config option next to menu option:
+
+:menuselection:`Character devices --> Serial drivers --> 8250/16550 and compatible serial support --> Console on 8250/16550 and compatible serial port`
+
You must compile serial support into the kernel and not as a module.
It is possible to specify multiple devices for console output. You can
define a new kernel command line option to select which device(s) to
use for console output.
-The format of this option is:
+The format of this option is::
console=device,options
@@ -28,11 +32,11 @@ The format of this option is:
You can specify multiple console= options on the kernel command line.
Output will appear on all of them. The last device will be used when
-you open /dev/console. So, for example:
+you open ``/dev/console``. So, for example::
console=ttyS1,9600 console=tty0
-defines that opening /dev/console will get you the current foreground
+defines that opening ``/dev/console`` will get you the current foreground
virtual console, and kernel messages will appear on both the VGA
console and the 2nd serial port (ttyS1 or COM2) at 9600 baud.
@@ -44,61 +48,61 @@ first looks for a VGA card and then for a serial port. So if you don't
have a VGA card in your system the first serial port will automatically
become the console.
-You will need to create a new device to use /dev/console. The official
-/dev/console is now character device 5,1.
+You will need to create a new device to use ``/dev/console``. The official
+``/dev/console`` is now character device 5,1.
(You can also use a network device as a console. See
-Documentation/networking/netconsole.txt for information on that.)
+``Documentation/networking/netconsole.txt`` for information on that.)
-Here's an example that will use /dev/ttyS1 (COM2) as the console.
+Here's an example that will use ``/dev/ttyS1`` (COM2) as the console.
Replace the sample values as needed.
-1. Create /dev/console (real console) and /dev/tty0 (master virtual
- console):
+1. Create ``/dev/console`` (real console) and ``/dev/tty0`` (master virtual
+ console)::
- cd /dev
- rm -f console tty0
- mknod -m 622 console c 5 1
- mknod -m 622 tty0 c 4 0
+ cd /dev
+ rm -f console tty0
+ mknod -m 622 console c 5 1
+ mknod -m 622 tty0 c 4 0
2. LILO can also take input from a serial device. This is a very
useful option. To tell LILO to use the serial port:
- In lilo.conf (global section):
+ In lilo.conf (global section)::
- serial = 1,9600n8 (ttyS1, 9600 bd, no parity, 8 bits)
+ serial = 1,9600n8 (ttyS1, 9600 bd, no parity, 8 bits)
3. Adjust to kernel flags for the new kernel,
- again in lilo.conf (kernel section)
+ again in lilo.conf (kernel section)::
- append = "console=ttyS1,9600"
+ append = "console=ttyS1,9600"
4. Make sure a getty runs on the serial port so that you can login to
it once the system is done booting. This is done by adding a line
- like this to /etc/inittab (exact syntax depends on your getty):
+ like this to ``/etc/inittab`` (exact syntax depends on your getty)::
- S1:23:respawn:/sbin/getty -L ttyS1 9600 vt100
+ S1:23:respawn:/sbin/getty -L ttyS1 9600 vt100
-5. Init and /etc/ioctl.save
+5. Init and ``/etc/ioctl.save``
- Sysvinit remembers its stty settings in a file in /etc, called
- `/etc/ioctl.save'. REMOVE THIS FILE before using the serial
+ Sysvinit remembers its stty settings in a file in ``/etc``, called
+ ``/etc/ioctl.save``. REMOVE THIS FILE before using the serial
console for the first time, because otherwise init will probably
set the baudrate to 38400 (baudrate of the virtual console).
-6. /dev/console and X
+6. ``/dev/console`` and X
Programs that want to do something with the virtual console usually
- open /dev/console. If you have created the new /dev/console device,
+ open ``/dev/console``. If you have created the new ``/dev/console`` device,
and your console is NOT the virtual console some programs will fail.
Those are programs that want to access the VT interface, and use
- /dev/console instead of /dev/tty0. Some of those programs are:
+ ``/dev/console instead of /dev/tty0``. Some of those programs are::
- Xfree86, svgalib, gpm, SVGATextMode
+ Xfree86, svgalib, gpm, SVGATextMode
It should be fixed in modern versions of these programs though.
- Note that if you boot without a console= option (or with
- console=/dev/tty0), /dev/console is the same as /dev/tty0. In that
- case everything will still work.
+ Note that if you boot without a ``console=`` option (or with
+ ``console=/dev/tty0``), ``/dev/console`` is the same as ``/dev/tty0``.
+ In that case everything will still work.
7. Thanks
diff --git a/Documentation/user/index.rst b/Documentation/user/index.rst
index 22f2ccac102b..8b0afcac2a72 100644
--- a/Documentation/user/index.rst
+++ b/Documentation/user/index.rst
@@ -11,6 +11,7 @@ Contents:
REPORTING-BUGS
SecurityBugs
kernel-parameters
+ serial-console
binfmt_misc
bad_memory
basic_profiling
diff --git a/Documentation/user/serial-console.rst b/Documentation/user/serial-console.rst
new file mode 120000
index 000000000000..fa315ca3b8e6
--- /dev/null
+++ b/Documentation/user/serial-console.rst
@@ -0,0 +1 @@
+../serial-console.txt
\ No newline at end of file
--
2.7.4
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