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Re: ttyS1


On Fri, 21 Dec 2001, Marcelo Chiapparini wrote:

> Hi to all!
> I am in a bit trouble. I deleted the /dev/ttyS1 file. Now I can't use the 
> modem. The file exist in another machine (both of them run potato 2.2r4). How 
> can I recover the file? Is a matter of copy the file to a floppy and copy back 
> in the first machine? 
It is not a real file, it is a device, so it cannot be copied to a disk.
You have to remake the device again.

Log in as root and go to /dev. There, run './MAKEDEV ttyS1'. This will
restore your serial port device. Alternatively, you can do it by hand. An
'ls -l /dev/ttyS*' will give you:

crw-rw----    1 root     dialout    4,  64 Jul  5  2000 /dev/ttyS0
crw-rw----    1 root     dialout    4,  66 Jul  5  2000 /dev/ttyS2
crw-rw----    1 root     dialout    4,  67 Jul  5  2000 /dev/ttyS3
^				    ^   ^
|character device		    |major and minor device number

So, it looks like /dev/ttyS1 has a minor device number of 65. By hand:
# mknod /dev/ttyS1 c 4 65
# chmod u+rw,g+rw,o-rwx /dev/ttyS1
# chown root.dialout /dev/ttyS1


  NT is the OS of the future. The main engine is the 16-bit Subsystem
  (also called MS-DOS Subsystem). Above that, there is the windoze 95/98
  16-bit Subsystem. Anyone can see that 16+16=32, so windoze NT is a 
  *real* 32-bit system.

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