Ubuntu :: Unable To Use The USB Virtual Com Port
Jan 16, 2010
I am having an issue with a VCP USB device not working. I know the device works ok on XP. When I check the USB drivers I get the following response (device in question is FTDI Serial in/out).OS is Ubuntu Studio 9.04 new install. I should add I'm not experienced with Linux and command line use but willing to learn. Device issue highlighted in bold.
user-laptop:~$ dmesg | grep -i usb
[ 0.773442] usbcore: registered new interface driver usbfs
[ 0.773476] usbcore: registered new interface driver hub
[ 0.773525] usbcore: registered new device driver usb
[code]....
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Mar 28, 2010
I'm not that great with mailservers, and just been thrown a curveball with a MS Exchange environment for which there is apparently no solution... yeah, right. But is there a workaround?
The problem is that the site mail (SMTP) needs to be sent via port 26 instead of the commonly used 25. Port 25 is mapped to a mailfilter, which apparently causes havoc with some of the mail, and the techs that have been on site trying to coax the Exchange server to co-operate have said that the only way would be to get rid of the filter.
The problem is that there are number of apps that are unable to have the outgoing port changed and so keep sending mail out on port 25.
I look after the Unix/Linux side of things at work, and I was wondering if there was an easy way to set up a Ubuntu box to receive mail on port 25 and just forward it to the MS box on port 26? So, in other words (and I hope this makes sense): monitor port 25, and forward whatever comes in on port 25 to the server on port 26. Simple portforwarding, or is it? What steps do I need to take?
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Apr 19, 2011
Just set up a virtual host on a different port: 50085. accessing this port always returns me to 'It Works!' page.
The setup:
1. added 'Listen 50085' in ports.conf
2. added a <VirtualHost *:50085></VirtualHost> the content are the same with the site that works with a <VirtualHost *:80>
3. /etc/hosts contains the ip address and the servername
4. apache server has been configtest ok and restarted.
Anything I forgot to configure? How to troubleshoot --> I don't get any data on error log file.
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Mar 25, 2010
I'm currently working on a project for university that requires communication, via an RS232 link between a piece of hardware (I have designed and am currently testing) and some software(which need testing).
I was hoping to have my hardware finished by now so I could get on with testing the software over Easter.
The hardware does not work yet but I would still like to test the software.
Does any one know if there a way to make a virtual serial port that I could put data on and read data off while my program accesses it as a regular serial port so I can check my code?
I am using Ubuntu 9.10 and am happy to give any more information on request.
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Mar 9, 2011
I want to create a virtual serial port in Fedora. I'm using Java code to communicate over a serial port. I want to test this code with out any serial devices connected.
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Oct 17, 2010
I'm trying to use a C++ program to communicate through a serial port on Ubuntu 10.04. I've installed LibSerial and for now I'm using virtual serial ports using socat. I'm getting an error on compiling (found below). But step by step, first I start the virtual serial ports:
Code:
(MYNAME@MYCOMPUTER):~$ socat -d -d PTY: PTY:
2010/10/17 22:04:18 socat[18575] N PTY is /dev/pts/2
[code]....
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Mar 22, 2010
Having trouble visualising how IP-Based Virtual Host (with SSL) would work. Here is my vhosts.conf file:
Code:
#Define Name Virtal Host
NameVirtualHost 10.10.0.54:80
#Used to replace the main server host. The log file will reside in /var/log/httpd/error_log
[Code]....
How will it work? I will need to forward port 443 to the 10.10.0.55 interface right? Without doing that, there is no way this is going to work... is there? And that means that I can't run more than 1 ip-based SSL virtual host on one machine because I can't forward 443 to two different interfaces.
Also, do I use internal ip address or external ip address in the <VirtualHost > tag? I only have one static public ip.
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Oct 1, 2010
I'm getting an error message (well .. two) when trying to run XP in Virtual Box.
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Mar 25, 2010
i install virtual box 3.0.8 on my ubuntu 9.10 and it error when i am running: no bootable system found !
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Jul 29, 2009
I successfully installed the virtual box on my fedora 8 system, and also created a virtual machine with windows xp OS, it works nicely, I try to configure the serial port of my virtual machine and try to configure the path for the port "screen shot are attached" it gives me the error message also the "screen shot are attached" for your review.Is kind of mistake is going on during the path setting, and how to set the path for configuring the serial port of my virtual machine so that I can use the hyper terminal tool of windows.
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Feb 18, 2010
I want to do a simple port redirect, i.e. whatever comes trough whatever interface on port AAAA will get redirected to port BBBBI thought that iptables -t nat -I PREROUTING --source 0/0 --destination 0/0 -p tcp --dport AAAA -j REDIRECT --to-ports BBBBhowever it doesn't work, e.g. nc -v -w2 -z localhost AAAA gives:
nc: connect to localhost port AAAA (tcp) failed: Connection refused
while
nc -v -w2 -z localhost BBBB
[code]....
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Oct 27, 2010
I am not able to install Ubuntu 9 on a MS Virtual PC. At one point it asked me install Vortual PC addons, Did that from Actions>ADDONS, but no luck from there on. Hung there for more than 2hrs. Black screen
I am using:
Windows XP Prof x64
SP 2.
AMD Athlon 64x2 Dual Core proc 4200+ ( 2.21 GHz )
RAM; 4.0GB
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May 23, 2010
I am using a F232 USB to serial adapter for connecting my wireless modem to my laptop and I wrote a simple C code for reading data received by the modem transmitted by another modem installed on my target device.The problem is my code is simply giving 0.00000 (float data) output .When I use the same code with my desktop its running fine and I am getting relevant data.What may be the problem? I even changed the permission for my /dev/ttyUSB0 I am using Ubuntu 10.04 on both my laptop and desktop
below is my code
Code:
#include <stdlib.h>
#include <math.h>
#include <errno.h> /* Error number definitions */
#include <termios.h> /* POSIX terminal control definitions */
[code]....
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Dec 29, 2010
64 bit lubuntu
trying to start a .bin file from desktop
gone to properties of file and made executable
open folder where .bin resides
open terminal
Quote:
dabud@GG64bit:~/Desktop/WCS185b32010b$ ./wcs185b3.bin
29/12/2010 00:37:00 Loading Config...
29/12/2010 00:37:00 Config Loaded
29/12/2010 00:37:00 Loading IP to Country Data
[Code]....
I am thinking it might be internet related. Google does come up with things re the error but I am not clear as to what I should do. WCS 1.8.5b3-Linux is a chat program
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Mar 4, 2010
Doing a dmesg I can see following lines
[ 130.876406] hub 1-0:1.0: unable to enumerate USB device on port 4
[ 130.876453] usb 3-2: USB disconnect, address 6
[ 131.200399] hub 1-0:1.0: unable to enumerate USB device on port 4
[ 131.396382] hub 1-0:1.0: unable to enumerate USB device on port 4
[code]....
That is what I have exactly pluged, the webcam on the top of my screen and an external mouse. Btw, I can plug USB devices with no problem, so I am skiping this error since long time ago, but I don't understand this message and I would love to do it.
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Jul 29, 2010
I'm currently having trouble getting a desktop to run Ubuntu.Booting up the Ubuntu Live disk delivers the error (There was an unresolvable error.Dropping you into a live environment).After the Live CD boots I'm able to partition/install from within Gnome.I proceeded to install 10.04 and update the system.After updating everything and the kernel I lose the ability to boot the system as it will totally freeze just as it auto-logs in.I'm unable to drop into a virtual console.
I tried the alternative CD thinking it would help and every install/test option besides MemTest86+ displays the crypic: Floppy Unknown Error(233)I don't use a floppy and this error doesn't show up anywhere, but in a dapper bug report.The bios is configured correctly.The HD (I've tried two) and memory are in good condition.
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May 19, 2011
I have VMware player on my laptop. I have three working virtual machines, Android, Windows Vista, and Kubuntu, and three that something went wrong don't work. How do I get rid of these space cloggers? Just go to Home folder/VMware and jus delete the folders of useless machines? Or is there a way to do it properly? Or am I stuck with these forever? And how do I rename a virtual machine?
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Jan 17, 2010
I installed Ubuntu 9.10 to my USB-HDD. After upadte, ubuntu can`t load with error:
usb 5-1: device description read/64: error -32
usb 5-1: device description read/8: error -71
hub 5-0:1.0: unable to enumerate USB device on port 1
The boot stopped after this strings.I reinstall the system, and I have this problem again.
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Mar 22, 2011
I have setup an OpenVPN server on my server box, it had been working perfectly until today. It operates on port 1194 which I am now unable to connect to (tried telnet). I have checked all the firewall rules and they still allow the port and I have also checked to ensure that OpenVPN is still listening to the port, which it's not but I have tried restarting the service and the box which dosent make any difference. The only thing that has changed is that yesterday I installed Openfire, could this have broken something?
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Jun 15, 2010
Just upgraded fro 9.10 to 10.04, and went to start VMware player. It needed to load and compile some modules.
All of them got a nice green tick except the Virtual Network Device
Unable to start services. See log file /tmp/vmware-root/setup-2986.log for details.
I cant access that log file. Set the folder to read only, and any contents, but theres no file in there.
How do I solve this so I can run WMware?
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Jan 18, 2011
I've set up a server running Ubuntu 10.10 (desktop) with apache. Problem is: When I try to configure multiple virtual hosts I can only access the first one. I'm sure that I'm missing something basic in my setup, but I cannot seem to figure out what.
What I want is simply two virtual hosts, one only available on the LAN where I can test my php files and one "live" available from the outside.
Heres what I've done:
Installed Apache2.2
Copy /etc/apache2/sites-available/default -> /etc/apache2/sites-available/dev
Modified "dev" config DocumentRoot and Document to point to /var/www/dev
Modified "dev" config VirtualHost to <VirtualHost *:1337> (port change right?)
Modified "default" config DocumentRoot and Document to point to /var/www/live
[Code].....
Live works fine, but dev cannot connect (as if there is no server there).
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Mar 13, 2010
I keep getting this email
httpd failed @ Sat Mar 13 15:26:03 2010. A restart was attempted automagically. Service Check Method: [tcp connect]
Failure Reason: Unable to connect to port 80
Is there anyone who know why this would Happen?
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Jun 3, 2010
My config :
Dell PowerEdge 2900III
16Gb RAM
2 arrays RAID1 (2*(2*500Gb))
CentOS5.5
VMWare 2.0.2 (with workaround of downgrade glibc to CentOS5.3)
Since the upgrade from CentOS5.4 to CentOS5.5, it seems the sshd is crashing every other day.I can access to the VMWare webserver, but no way to connect through ssh port 22.The only "workaround" is a hard reboot of the server, and with luck, I can access to the server through ssh.I checked /var/log/secure, it looks like time to time when the server start, it does not start the sshd service, there is no entry at all for the time the server started up. For instance today, the server has been started early this morning, but the first entry was found after a hard reboot this evening : Jun 3 18:19:14 hercules sshd[3617]: Server listening on 0.0.0.0 port 22.
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May 2, 2010
I have a mail server i need it to send message via port 587 not port 25, i make some changes to my postfix server which i use and it is already successed making a telnet to 587 port like it :
[Code]....
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Jul 16, 2010
Recently my Ubuntu 10.04 was booting slow and to figure out what was going wrong, I booted Ubuntu in text mode. There I found it was hanging on for 5-6 sec showing "unable to enumerate usb device to Port 1". I know it has something to do with Port1 / usb device, but could not understand and solve it.
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Jul 18, 2010
I've been working and researching this for about a week now and I still haven't had any luck. Basically, I have been trying to open port 3306 to allow connections to my MySql server.
i've added the rule into iptables, saved and restarted that i've added the rule into my router. and I have removed "skip-networking" from the my.cnf file and added the blind address in, I'm trying to get this all to work on my LAN, but it doesn't seem to work, I've also restarted the entire server and then port scanned it from outside and inside the networking and it still tells me that 3306 is closed.
I did however i had some luck when I entered the Ip of the machine that would be sending data to the server but then PROFTPD stopped working and the port was open :/ im not really sure what ip should be in there but another thread from another forum said to enter the ip of the machine that mysql is installed on.
so currently its 192.168.0.2 which is the static internal address of the server.
every machine on the network has a static ip and all the rules have been added to each firewall, i.e. server and router firewalls.
ill pop my "my.cnf" under this to see if anyone can find a mistake,
Code:
# This will be passed to all mysql clients
# It has been reported that passwords should be enclosed with ticks/quotes
# escpecially if they contain "#" chars...
# Remember to edit /etc/mysql/debian.cnf when changing the socket location.
[Code].....
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Apr 16, 2011
My computer won,t boot up anymore, i keep getting the following mistake message: Unable to enumarate usb device on port 2. Don,t know how to skip that, and continue to desktop.
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Jul 13, 2009
I tried to yum install libvirt but it says it is the latest.I have also checked that i have the latest qemu-kvm virt-manager virt-viewer python-virtinst.I understand that the error msg says that it is unable to find that certain file, libvirt-sock, and i dun think i have it either.
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Feb 1, 2009
loaded fedora 10 on my laptop.I get the runlevel 5 in the first one (CTRL+ALT+F5).nothing happens when I press the F2 through F6.
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Mar 24, 2010
My Eth0 has 3 virtual Ethernet (eth0:1, eth0:2, eth0:3)
Eth0 -> 202.1.1.1
Eth0:1 -> 202.1.1.2
Eth0:2 -> 202.1.1.3
Eth0:3 -> 202.1.1.4
I am unable to ping them (202.1.1.2 - 202.1.1.4) from Client's PC.
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