General :: Two Networks Cannot Be Accessed Simultaneously

Mar 14, 2011

I have two networks on a server. One being my internal network, and the other being an external IP address. This is on Debian Lenny. Here is my /etc/network/interfaces file:

I can reboot my system and sometimes eth1 is accessible from SSH, and other times eth0 is accessible. Then sometimes eth1 will just stop being pingable alltogether. This is a fairly fresh install of Debian, and the only thing I have running is VMWare Server 2.0, bridged to both of my network connections.

Here is what my route looks like:

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Networking :: Use Both Networks Simultaneously Ppp0(usb Device) And Eth0

Apr 30, 2011

I am running a CentOS 5.6 as a Virtual Machine on my Laptop. And, to connect to internet I am using a datacard (usb modem) device (Tata Photon +).

Now, internet is working well on my VM through interface ppp0

The problem is that when I start my interface eth0, internet (running through ppp0) stops.

Quote:

[root@kick ~]# ip route show
172.29.242.9 dev ppp0 proto kernel scope link src 14.99.211.189
default dev ppp0 scope link
[root@kick ~]# ip addr sh
1: lo: <LOOPBACK> mtu 16436 qdisc noop

[Code]....

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Ubuntu Networking :: Using Tether Or Ad-hoc Networks Causes Headaches With Other Networks?

Apr 16, 2011

I am trying to configure my android phone (rooted Eris running kaossfroyo 2.2) to be used as a midi controller. Which I am having enough trouble with as it is but it has raised an annoying issue that occurred a month ago when I used the phones tethering network with my laptop. After connecting the laptop to the phones network (either tether, or an Ad-hoc network created using the network manager) I am unable to switch to other networks. In other words when I'm done with the phone-laptop connection I cannot connect my laptop to my home network! When I click on the other network connection I can see that it is attempting to connect in the upper right corner of the desktop (the network icon) but it will not make the connection.

What happens is that the network indicator will make the little circle graphic as if it is trying to connect but it never will display the other circle as green indicating that it has connected. but when I disconnect from the home network that is not connecting I will get a message underneath that will say that ad-hoc network disconnected! If I am switching from the android tether it will say Android-Tether disconnected etc. Even though when I click on network manager it shows that I am attempting to connect to the home network (labeled LIBERTY in my case) upon disconnection it shows the ad-hoc or tether connection being disconnected.

I am absolutely baffled by this! The issue persists even after deleting the ad-hoc connection from the wireless settings tab!!! I would speculate that for some reason the laptop is attempting to connect to the previous ad-hoc connection despite me wanting it to connect to LIBERTY. I am very confused and hope someone can lead me in the right direction.

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It's easy to have multiple user accounts on one computer and even switch between accounts without logging off. It is also possible to have more than one display connected to a single computer. Is it possible to have one multi-core computer be used simultaneously by two users in their own accounts? Is there specific hardware required (to allow keyboard and mouse distinction for each user) and software configuration?

I know you can setup remote connections on windows that allow you to open and use a second user account without bothering the first user, but how about working locally on the same machine, essentially removing the network delay of remote desktops? What OS supports this? Linux Ubuntu? Windows 7?

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General :: Pthreads - Executing Two Different Functions Simultaneously

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General :: Running A Program In Multiple Subdirectories Simultaneously

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General :: Is It Safe To Mount Encfs Via Nfs On Several Machines Simultaneously

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So I want to ask about your experience: Is it safe to mount an encfs folder on several computers at the same time? All computers use "hard" and "sync" as nfs mount options to minimize risks of data loss. But can I access the folders simultaniously, or do I risk corrupting the encfs encryption and lose everything?

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General :: 2 Disks Failed Simultaneously On A RAID 5 Array?

Apr 15, 2011

I have a home server running Openfiler 2.3 x64 with 4x1.5TB software RAID 5 array (more details on the hardware and OS later). All was working well for two years until several weeks ago, the array failed with two faulty disks at the same time. Well, those thing could happen, especially if one is using desktop-grade disks instead of enterprise-grade ones (way too expensive for a home server). Since is was most likely a false positive, I've reassembled the array:

Code:

# mdadm --assemble --force /dev/md0 /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1
mdadm: forcing event count in /dev/sdb1(0) from 110 upto 122
mdadm: forcing event count in /dev/sdc1(1) from 110 upto 122

[code]....

Right. Once is just a coincident but twice in such a sort period of time means that something is wrong. I've reassembled the array and again, all the files were intact. But now was the time to think seriously about backing up my array, so I've ordered a 2TB external disk and in the meantime kept the server off. When I got the external drive, I hooked it up to my Windows desktop, turned on the server and started copying the files. After about 10 minutes two drives failed again. I've reassembled, rebooted and started copying again, but after a few MBs, the copy process reported a problem - the files were unavailable. A few retried and the process resumed, but a few MBs later it had to stop again, for the same reason. Several more stops like those and two disks failed again. Looking at the /var/log/messages file, I found a lot of error like these:

Quote:

Apr 12 22:44:02 NAS kernel: [77047.467686] ata1.00: configured for UDMA/33
Apr 12 22:44:02 NAS kernel: [77047.523714] ata1.01: configured for UDMA/133
Apr 12 22:44:02 NAS kernel: [77047.523727] ata1: EH complete

[code]....

The motherboard is Gigabyte GA-G31M-ES2L based on Intel's G31 chipset, the 4 disks are Seagate 7200.11 (with a version of a firmware that doesn't cause frequent data corruption).

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General :: Multiple Nic Cards Rhel5 Cannot Be Access Simultaneously?

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General :: Simultaneously Execute 8 Instances Of A Program Until All Input Files Are Processed?

Sep 27, 2010

I have a machine with 8 cores. I have a directory of input files that I need to process using a non-parallelized program. I would like to write a script that works its way through a list of commands executing 8 commans (i.e., instances of this program; each with specific flags having to do with the current input file) until the list of commands has been exhausted. Is there an easy way to do this?

Code:

hamstrsearch_local-hmmer3.pl -protein -refspec=lotgi_2713 -hmmset=lophotrochozoa_hmmer3 -sequence_file=Aplysia_californica.fas -taxon=ACAL

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General :: Machine Act As Both A Wireless Client And Access Point Simultaneously Using A Single Physical WLAN Interface?

Jun 23, 2010

If I have only 1 physical WLAN interface, is there some hackery that can be done so that it can be a client of an existing access point and at the same time also act as an access point for other clients? I have an existing 802.11g ADSL router, and I'm going to be building an HTPC which will have 802.11n. My laptop also has 802.11n, but at the moment it only connects at 54Mbps because thats what the AP supports. I'd like to be able to have the HTPC be a client of my ADSL router, but have my laptop be a client of the HTPC, so copying files to it will be faster.

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Ubuntu Networking :: No Longer See Any Networks Under "Wireless Networks"?

Jan 7, 2010

I could use Wireless network. I could see several different networks in my range. Then suddenly the network stoppedworking, and I can no longer see any networks under "Wireless networks".The Wired networks works fine.I tried upgrading ubuntu, but nothing changed. Just to confirm, I rebooted the computer in Windows Vista (Dual boot) andconfirmed that Wireless worked fine there. No hardware problem then.The suggestions I have found on this and other forums suggest looking at the output from iwconfig and ifconfig. But since I'm a n00b at Ubuntu I don't know what to make of it.

This is the output:
emil@emils:~$ iwconfig
lo no wireless extensions.

[code]...

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General :: Cannot See Wifi Networks?

Feb 2, 2011

I am dualbooting Linux Mint and Windows 7 on my Toshiba laptop. windows, I can see wireless networks. However,nder Linux, when I click on network connections, my wifi network doesn't show up. What should I do.

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General :: No Wireless Networks Appear?

Jan 27, 2011

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Feb 17, 2010

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Ubuntu :: Server Can't Be Accessed / What To Fix It?

Feb 1, 2011

My server is Ubuntu 10.04 which is used to test an Open ERP system.
However, once I setup everything and trying to be access from other workstations, it doesn't work!
Also, the server cannot found any Windows PCs in the network.

Does anyone know how to resolve this problem?

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