TTYS(4) Linux Programmer's Manual TTYS(4)NAME
ttyS - serial terminal lines
DESCRIPTION
ttyS[0-3] are character devices for the serial terminal lines.
They are typically created by:
mknod -m 660 /dev/ttyS0 c 4 64 # base address 0x3f8
mknod -m 660 /dev/ttyS1 c 4 65 # base address 0x2f8
mknod -m 660 /dev/ttyS2 c 4 66 # base address 0x3e8
mknod -m 660 /dev/ttyS3 c 4 67 # base address 0x2e8
chown root:tty /dev/ttyS[0-3]
FILES
/dev/ttyS[0-3]
SEE ALSO chown(1), mknod(1), tty(4), agetty(8), mingetty(8), setserial(8)COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the
latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.
Linux 1992-12-19 TTYS(4)
Check Out this Related Man Page
HD(4) Linux Programmer's Manual HD(4)NAME
hd - MFM/IDE hard disk devices
DESCRIPTION
The hd* devices are block devices to access MFM/IDE hard disk drives in raw mode. The master drive on the primary IDE controller (major
device number 3) is hda; the slave drive is hdb. The master drive of the second controller (major device number 22) is hdc and the slave
hdd.
General IDE block device names have the form hdX, or hdXP, where X is a letter denoting the physical drive, and P is a number denoting the
partition on that physical drive. The first form, hdX, is used to address the whole drive. Partition numbers are assigned in the order
the partitions are discovered, and only nonempty, nonextended partitions get a number. However, partition numbers 1-4 are given to the
four partitions described in the MBR (the "primary" partitions), regardless of whether they are unused or extended. Thus, the first logi-
cal partition will be hdX5. Both DOS-type partitioning and BSD-disklabel partitioning are supported. You can have at most 63 partitions
on an IDE disk.
For example, /dev/hda refers to all of the first IDE drive in the system; and /dev/hdb3 refers to the third DOS "primary" partition on the
second one.
They are typically created by:
mknod -m 660 /dev/hda b 3 0
mknod -m 660 /dev/hda1 b 3 1
mknod -m 660 /dev/hda2 b 3 2
...
mknod -m 660 /dev/hda8 b 3 8
mknod -m 660 /dev/hdb b 3 64
mknod -m 660 /dev/hdb1 b 3 65
mknod -m 660 /dev/hdb2 b 3 66
...
mknod -m 660 /dev/hdb8 b 3 72
chown root:disk /dev/hd*
FILES
/dev/hd*
SEE ALSO chown(1), mknod(1), sd(4), mount(8)COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 1992-12-17 HD(4)
Can someone please tell me what the command mknod does and what it's syntax is? I can't find it in my "Unix for dummies" book or "Unix in s nutshell". I found it in an existing script that I want to copy, but I want to understand what I am doing. The script is going to do a full export of an... (3 Replies)
I tried this today but without the argument
mksysb /dev/rmt1 it worked great!! Thank you
I am just learning how to use the man pages and finding them very helpful
Thanks Again (0 Replies)
I'm trying to use the "mknod" call in C to create a clone of /dev/null. I am stumped as to the final parameter I should provide to "mknod()". I am supposed to give it a type dev_t, which specifies a major & minor number. I want to specify major 3, minor 1, but how can I do this?
dev_t seems to... (2 Replies)
It sure sounds like a simple request....
I need some C code that will enable me to fetch the IP address of the tty attached to the current process.
In short:
char *myIPAddress(void)
{
// somebody help me fill in this part!!
}
-BL:confused: (4 Replies)
Hi all
I encountered a strange phenomenon when reading / writing to RS232 serial device (on my machine /dev/ttyS0)
I have simple 2 processes:
1) process which WRITE characters from /dev/ttyS0
For example write the characters... (2 Replies)
Hi all,
I am new in Unix world. I usually need to trace who connect to which terminal by IP address. So, could you please show me HOW TO RECOGNIZE which IP address connected to terminal? I use netstat by no luck.
Thank you, (9 Replies)
Hello!!!
I try to run this code in cygwin:
echo "AT">/dev/ttyS2
echo "AT+COPS=?">/dev/ttyS2
read $LINE</dev/ttyS2
echo $LINE
I want to communicate with serial port /dev/ttyS2 but I found some problems. I have tried to use the AT commands in Hyperterminal and it has worked...why doesn't... (2 Replies)
Hi,
I need to provide more than one character to "> /dev/tty" through terminal/keyboard input, I have this:
ok=false
while
do
echo " Enter r1 to reformat "
> /dev/tty
read choice
case $choice in
)
echo " bla bla bla "
;;
done
However, in this way,... (3 Replies)
Hi,
I'm using CentOS 5.5. I connected serial terminal using "cu". The command I had given was "cu -l /dev/ttyUSB0 -s 115200". It connects I'm seeing the target boards boot-up messages and log in screen. But I couldn't type anything on "cu" terminal window.
Any help is highly appreciated.
... (1 Reply)
hello all,
please any one can provide me the shell script to write data to /dev/ttyS1
and read responce from /dev/ttyS1 and compare the responce to some string ..
thnxx
---------- Post updated at 03:35 PM ---------- Previous update was at 11:46 AM ----------
any body help me..
how do i... (1 Reply)
Hi Guys,
On my AIX server , I have this file "mknod" present in the /etc/ directory. When i try opening it , I dont find
any ascii characters. It shows some encryption/binary format which is not readable. Is it any executable ? what is the
purpose of having this file in etc folder? what if... (2 Replies)
mknod /dev/vda b 253 0
mknod /dev/vda1 b 253 1
mknod /dev/vda2 b 253 2
mknod /dev/vda3 b 253 3
I know below code is ease to handle, but I don't know above code
mknod /dev/vda1 b 253 1
mknod /dev/vda2 b 253 2
mknod /dev/vda3 b 253 3 (3 Replies)
My understanding is that "setserial" command is used to change the attributes of
serial device files (ttyS) managed by the linux serial driver(serial module).
My doubt is, using setserial command is it possible to change the attributes of other serial device files managed by a different driver... (2 Replies)
Dear List -
I am trying to capture data from a serial port and write it to a file.
/var/www$ cat /dev/ttyS0 > scale_value.html
cat: /dev/ttyS0: Device or resource busy
/var/www# cat /proc/tty/driver/serial
serinfo:1.0 driver revision:
0: uart:16550A port:000003F8 irq:4 tx:90... (11 Replies)