Ubuntu Servers :: Connect To Serial Console And Check It Remotely?
Jan 18, 2011
I am trying to connect to serial console, local one, just to verify than it works, is is possible?Well, I configure serial console
Code:
# ttyS0 - getty
#
# This service maintains a getty on ttyS0 from the point the system is
# started until it is shut down again.
[code]...
It is started, now I am trying to connect to the console via minicom, is it possible from machine where the console is running?If not, how could I check it remotely?
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Feb 23, 2011
I have installed KDE and all the software for it to run on my server through the serial console but when I go and run "startx" I get the following and KDE doesn't start running.
root@u15434060:~# startx
X.Org X Server 1.7.6
Release Date: 2010-03-17
X Protocol Version 11, Revision 0
Build Operating System: Linux 2.6.24-28-server x86_64 Ubuntu
[Code].....
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May 28, 2011
Is there a way to get console output over a serial (COM) port? I have a box that I use as a NAS, DNS, DHCP and mt-daapd server, I don't have a spare monitor and it is not worth buying one just to use it once or twice a year.
I found this guide [url] but it doesn't work with Natty
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Jul 22, 2011
System hostname Server Operating system Ubuntu Linux 11.04 Webmin version 1.550 Time on system Fri Jul 22 09:23:44 2011 Kernel and CPU Linux 2.6.38-10-generic on i686 Processor information Genuine Intel(R) CPU 2160 @ 1.80GHz, 2 cores
Every couple of hours I am unable to ssh or vnc in to my system or anything else. I can remote into another PC on my LAN and everything works fine. The only things that fixes the problem is restarting the system. Could someone point me in the right dirrection to start trouble shooting this problem? I am still learning where all the log files are and I am generally new to linux
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Dec 26, 2010
I keep getting this error trying to connect to newly installed postgres server on Amazon EC2 running Ubuntu Maverick Meerkat....
Could not connect to server: Operation timed out Is the server running on host "....ap-southeast-1.compute.amazonaws.com" and accepting TCP/IP connections on port 5432?
I've updated config files, as follows...
pg_hba.conf
added
host all all 124.168.242.0/24 trust
where 124.168.242.0 is the IP range of my ISP
postgresql.conf
listen_addresses = '*'
port = 5432
I am attempting to connect with pgAdmin 3 client. I don't think the problem is the client.
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Mar 23, 2010
We have a new machine with RedHat enterprise 5 on it. I need to connect a serial cable to the serial port and talk to another system (old alpha system) instead of using a VT connected to the alpha.Does RedHat come with anything like Keaterm/hyperterm/etc etc?
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Oct 5, 2010
I start a process which is copying items from my desktop computer onto a memory stick. I then leave the house with my laptop and some hours later i use ssh to login to my desktop. I can see weather the process is running still using top, and i can kill it, but is there any way to let me logon to the local console i.e /dev/tty1 so i can control this process directly?
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Jun 20, 2010
I am trying to pxe boot ubuntu 10.04.When it boot up,it doesn't show up login prompt from serial console ttyS0, Why ttyS0.conf job isn't invoked automatically ? is there anything wrong with configuration?
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Jun 20, 2010
I am trying to pxe boot ubuntu 10.04
grub config:
Code:
title Linux NFS
dhcp
root (nd)
kernel /vmlinuz-2.6.34 console=ttyS0,9600 root=/dev/nfs nfsroot=192.168.1.1:/home/nfsroot ip=dhcp rw
initrd /initrd.img-2.6.34-pxenfs
[Code]....
Why ttyS0.conf job isn't invoked automatically ? is there anything wrong with configuration?
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Oct 7, 2010
I've got a home server running ubuntu 10.0.4. It have no monitor or keyboard. So I want to access it from a serial console. (I use SSH currently but if something goes wrong, I need to be able to do something... so serial console seems a fine thing). OK, so on the server, I tell grub to output everything on ttyS0 and opened a getty on ttyS0. On the client side (Laptop running Ubuntu 10.0.4 with pl2303 USB to Serial adapter) I use Minicom.
Home server restart:I see grub menu, linux kernel messages, login prompt. But, I can't do anything:In grub or at the login prompt, no key press is recognized by the server.I've got write permission to /dev/ttyUSB0. I tried a different getty (mgetty)with no success.I stopped the getty on ttyS0 on the server. And run minicom.
From the server's minicom, if I type something, it appear on the client screen. From the client's minicom, if I type something, some garbage appear on the server screen :(One of this things for each char typed). If I short-circuit pin 2 and 3 of the client serial port, it echoed what I type. The two serial ports are connected with a nullmodem cable. (seems to be a full handshaking cable). Of course, same serial port config for both minicom, grub and getty. Hope I'm understandable enough. (English not my primary language). Can somebody help me make this *$*#! serial console working right ? I'm on it for 10 hours now with no success...
Edit : I nearly forgot to tell you I had to update the standard ubuntu kernel to 2.6.34-020634rc1-generic because there was a bug in the pl2303 driver in the stock kernel (2.6.32-25-generic) which prevented me from doing anything (even receiving).
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Aug 21, 2015
I have a dell poweredge server. In the bios, it has the option to redirect the screen to the serial port. There is also the check box "redirection after boot" which from what I understand will let me to continue to use the serial port attached to a terminal as if it was the main VGA monitor with a keyboard attached.
When I start the machine up, everything goes as expected, I see the output from the bios on my serial terminal, until debian actually starts booting. It all goes blank. If i attach a monitor i can see it is indeed booted and waiting at the debian login prompt. What should I do from here? I was under the impression that if i enabled "console redirection after boot" that the os would be none the wiser and i could continue using the serial console as the main screen as needed, but that does not seem to be the case.
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Jan 14, 2011
i was using a serial console program (not minicom) two weeks back but took a break and have no idea what it is! man, it was awesome, too. it had a nice gui, similar to hyperterminal...and from what i think i remember it came packaged with f14.
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Apr 16, 2009
I configured the serial consol on centos5 as follows
# dmesg |grep tty
Kernel command line: ro root=/dev/VolGroup00/LogVol00 console=tty0 console=ttyS0,9600n8
serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A[code]......
But I could not consol Centos server from my labtop (win xp) Is there missing or wrong configurations ?
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Dec 22, 2009
I am looking for a solution to administer my remote server running SUSE LINUX 10.1 (X86-64) - Kernel 2.6.16.13-4-smp. I have made changes to server and is able to see the boot process and also able to login to system through serial console.
My question, will I be able to administer the server through serial console incase if my root partition is corrupted and system has gone to maintenance shell(or root shell).
Also is there way to go directly to maintenance shell from grub(not talking about single user mode). I want to go maintenance shell where / partition is not mounted.
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Dec 16, 2009
I am trying to connect to a cisco console port using the usb to serial converter. I am using minicom and I changed me setting to reflect the USB converter cable, but it isn't working. I have set my baud rate to 9600, 8 data bits and no parity. Minicom acts as if it is connected (it doesn't give any errors), but there is nothing on the screen and nothing happens when I type. Also, I use the tail command and it sees the usb connector connected when I unplug it and plug it back in.
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Oct 20, 2010
I would need to monitor the status of an electric relay. To do so I was thinking the serial port and perl (as I don't know C ) how to check if a switch connected to a serial port is open or closed. Here is my plan, I'll plug a electric relay on the electric network and monitor the state of the switch. if the switch is closed, that mean that we are on the electric network if the switch is open that mean that we are on our diesel power generator.
PS: There will be no voltage input involve (although I can if that's required)
I'm planning to use this with Nagios to know if we are on the electric network or on our diesel power generator.
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Mar 22, 2010
i have ubuntu 10.04 lucid i used gnome-file-share-properties to enable remote desktop i have samba i have ping from remote computer to my ip address and computer name and etc but still i can't connect remotely via rdp or at least not via windows xp rdp what do i need to fix to enable this?
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Oct 28, 2010
I use Xmanager to connect to a linux machine (ubuntu 10.10). However there is no display. Here is the log:
Code:
[13:43:27] Connected.
[13:43:28] Version exchange initiated...
[13:43:28] server: SSH-2.0-OpenSSH_5.3p1 Debian-3ubuntu4
[13:43:28] client: SSH-2.0-nsssh2_3.0.0011 NetSarang Computer, Inc.
[13:43:28] SSH2 is selected.
[Code].....
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Aug 30, 2010
I'm running Ubuntu on a Zotac home theater PC. I wish to connect from another PC prior to login. The reason is that the home theater system has no convenient display. I've succeeded in getting a connection prior to logon from a PC using TightVNC. I've also tried Teamviewer running in Ubuntu without success. I'm now experimenting with X windows, but it seems complicated.
TightVNC is working well ecept that it opens a new session and I'd rather share the same session on Display 0. how best to connect to my Ubuntu home theater PC prior to logon and share the same session.
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Mar 7, 2010
I have 5 PCs running windows XP and I want to remotely connect to a server that has Ubuntu.
I want all of them to have their own passwords and own desktops something like Remote desktop in windows and each one can run his programs separately.
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Sep 20, 2010
I am new to Ubuntu and have been trying to make a remote connection to my home server. I think I almost there. Here's what I have done:
1) Installed Ubuntu Server 10.0 on a Pentium 2 with 256K
2) Installed SSH, MySQL, desktop GUI and enabled remote access
3) Port forwarded my Lynksys to 5900:22 and 80
4) installed Putty and TightVNC Viewer
5) Obtained a DynDDS account
My interanl IP Addy = 192.168.x.yyy
My External IP Addy = 76.xxx.y.zzz
When I run Putty, the connection times out (which I am guessing that my server may not be setup correctly). Since I am configuring all this at home, I am unable to simulate a true remote access unless I go to an outside location. Is there a way to test my connection from outside my network rather than waiting to login remotely from a place other than my home?
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Sep 24, 2010
I have been using TightVNC (on XP) to remotely connect to my Ubuntu machine at home while in the office. This just worked. After upgrading to 10.10, I no longer can connect. Errormessage: Failed to connect to server (my ip) Looked at remote desktop settings, but these are not changed. Port forwarding is working and I use an internal fixed ip, so I can't imagine this being a problem (I doublechecked it anyway!). Anyone seen similar behavior> And, more interestingly, anyone know of a way to fix this?
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Jul 12, 2010
i have a computer at another house that i would like to controll from my house (both run ubuntu lucid lynx) how do i connect to the other computer using the viewer and remote server pre-installed in ubuntu
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Jan 15, 2011
I have my Linux box in my Lan environment. I want to connect my Linux computer remotely from my windows PC using command line . how can I connect it remotely over the Lan ?
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May 25, 2010
Just throwing in a quick question to see if anyone got any ideas about this.I'm unable to create a remote X session with TightVNC viewer. The local computer is a windows XP box and the remote server is running Slackware 13.
Using Putty on the XP box to connect to Xvnc through a ssh tunnel works just fine. However, when I fire up TightVNC viewer and try to connect to 127.0.0.1 as I'm used to, TightVNC viewer is unable to establish a connection to X. I'm puzzled.
This has worked when I used another XP box as local computer. I'm running all within my LAN. Can this be a firewall/iptables issue? I've obviously posted this in wrong forum category. Sorry about that. Starts this thread in server category too.
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Feb 15, 2010
RedhatEL5(as guest) in Vmware ace, installed Samba, when:
#links http://localhost:901 ENTER
It works
but not with
#links http://127.0.0.1:901 ENTER
hence can't connect remotely from XP(host Computer).
Restarted accordingly, xinetd, with IPtables stop, #/etc/xinetd.d/swat file(disable = no) etc. How to fix this?
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Jan 11, 2011
I just succesfully installed Centos 5.5 64bit with following package:
- httpd 2.2.3-43
- php-mysql 5.1.6-27
- mysql 5.0.77-4
and all these packages are running ok.
My question is how do i connect from Centos to another MSSQL server using PHP? I had read several article but cannot find the best way to achieve this because most of the instruction seems to be quite complicated. I found somewhere in this forum that all it need just this simple command: "yum --enablerepo=extras install php-mssql freetds". While others article said that i need to install "FreeTDS" and some ODBC driver. I'm a little bit curious since most of that article are using an older version of Centos and PHP.
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Sep 20, 2010
I am having an issue with Ubuntu 10.10 and VNCServer. I can connect to my Ubuntu box remotely with VNC, but if I type any character anywhere, it closes out the window I was typing in. I dont seem to have a problem clicking and opening windows and applications, I just cant type anything into them without the window closing. Has anyone seen this behavior and know what the fix is?
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Jan 31, 2011
I'm running vsftpd-2.2.2 on Slackware 13.1 and I'm behind a NAT with a dynamic IP. I'm using pasv_address, which makes it necessary to have a crontab that checks whether my IP has changed, and if it has, edits the conf and restarts vsfptd. It's hackish but it works. I have also enabled FTPES on the same port that normal FTP runs. I have allowed only the 5001:5003 ports and I am aware that the recommented is 50 ports. However I never had an issue with the transfers since I'm the only user and have at maximum two simultaneous transfers.
I can connect remotely with FTP and FTPES with every client I tried but I'm having issues locally. FileZilla refuses to connect on FTP and FTPES. WinSCP can connect on FTP but not FTPES. Issues are gone if I enable pasv_promiscuous, which the manpage strongly recommends not to use unless "you know what you're doing". I don't. Why is this happening? And, can I fix the local connections without resorting to pasv_promiscuous?
Here is my config and log files from a failed local attempt.
vsftpd.conf
Code:
anonymous_enable=NO
local_enable=YES
write_enable=YES
local_umask=022
[code]....
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Jan 19, 2011
i would like to connect to my cisco via a console port and i dont konw how
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