Go Premium for a chance to win a PS4. Enter to Win

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 909
  • Last Modified:

How to create the one more terminal tty device on the single user mode ???

How to create the one more terminal tty device on the single user mode ..


Preferably I want create this device over the serial  usb...

such tty, ttyS0 device I able to create in other run level using the serial port(null modem cable). But whether it is possible to create it using usb

0
arulkumarabi
Asked:
arulkumarabi
  • 3
  • 2
1 Solution
 
Duncan RoeSoftware DeveloperCommented:
I assume from your Q that in multi-user mode, you can plug in the serial to USB adapter and an entry is created for it in /dev. Is that right?
Supposing the device in /dev/is called ttyUSB0 and is a symbolic link. To see where the link and any subsequent links point, use ls's -L option, e.g.

ls -lL /dev/ttyUSB0

You will see an entry similar to:

crw-rw----  1 root tty 3, 10 2008-06-11 06:50 /dev/ttypa

ttypa is not a USB device but I hope it gives you the idea. A simple "ls -l" of it gives:

lrwxrwxrwx  1 root root 7 2008-06-11 06:50 /dev/ttypa -> pty/s10

The important items to note from ls -Ll are the 2 numbers after the group (tty), and the fact that the entry starts with "c". "c" means it's a character device (the alternative being "b" for block) with major number 3 and minor number 10. In single-user mode, you could re-create this device (using whatever name you like, say ttyS0) with the mknod command:

mknod ttyS0 c 3 10
0
 
stephenhoekstraCommented:
I'ld think because it says 'single user mode', it's only going to allow console access, not terminal connections of any type.
0
 
Duncan RoeSoftware DeveloperCommented:
Under 'single user mode', you can start what you like
0
Configuration Guide and Best Practices

Read the guide to learn how to orchestrate Data ONTAP, create application-consistent backups and enable fast recovery from NetApp storage snapshots. Version 9.5 also contains performance and scalability enhancements to meet the needs of the largest enterprise environments.

 
arulkumarabiAuthor Commented:
We  will keep it in the runlevel 2 (multiuser without network )..

Using null modem cable (com port) it is possible to create tty terminal in the windows using hyper terminal,  putty etc., Whether it is possible to create same thing using the usb cable or usb device..




0
 
Duncan RoeSoftware DeveloperCommented:
Should be - as long as you have a USB to serial converter and have the modules that support it. Haven't actually tried it yet myself.
0
 
arulkumarabiAuthor Commented:
ok thanx - I will try and get back to you
0

Featured Post

[Webinar] Cloud and Mobile-First Strategy

Maybe you’ve fully adopted the cloud since the beginning. Or maybe you started with on-prem resources but are pursuing a “cloud and mobile first” strategy. Getting to that end state has its challenges. Discover how to build out a 100% cloud and mobile IT strategy in this webinar.

  • 3
  • 2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now