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• Ubuntu: How to login without entering username and password

  - by torbengb

  I'm a newbie running Ubuntu 9.10. I have two users (wife and me), and each user's screensaver is set to lock so that on wakeup, we get to choose which user's desktop to go to. However, Ubuntu requires a password, so this is pretty tedious. I'd like to switch users without entering any password. I know about this trick that works for the boot login, but it doesn't deal with multiple users. Is it possible to set empty passwords for users in Ubuntu, or skip the password in other ways? (I'm expecting real Linux users to suggest that passwordless users must not get any rights and there be an admin user with a strong password. Yes, you're right. But that's not what this question is about. Thanks.)

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• Computer shutsdowns when trying to boot

  - by Zexanima

  I have an IBM ThinkCentre, and I was talking to someone on Skype when it suddenly just shutoff. When I rebooted it asked me to start windows normally or in safe mode, but as soon I choose an option (Any of them) it shuts back down. So I thought it was a problem with windows and tired booting from a Hirens disk, but same thing. I've been using this computer without problems for over a year know. Any idea's for me to try? Unfortunatly I don't have any powersupplies or extra RAM to switch out to try anything like that. EDIT I left it off for a while and it's booting to windows now. I would still like to know what might have been causing it to do that if you have any ideas.

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• Manage Upload Permissions, SFTP & Linux

  - by John R

  I'm new to Linux. I am working with a Redhat 5.5 server and am using a Java-based SFTP script that will allow multiple users to upload text files to a server. I am undecided if each user will have a separate directory or if I will use a naming convention that includes their customer ID. The files include some personal information about their LAN settings, so I prefer to use SFTP as apposed to FTP. It is my understanding that SFTP is encrypted (Also, I have a Java class configured to upload via SFTP, so I prefer not to switch protocols unless their is a very-good reason). The prototype is for a system that will support large numbers of customers and the thought of continually adding and removing clients through the command line seems highly impractical. (Again, I am new_to/learning Linux and Redhat). What are normal conventions for giving multiple users permission to SFTP upload files with a unique username and password for each.

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• My acer aspire laptop suddenly stopped working, just a blank screen

  - by mazda

  My acer aspire laptop suddenly stopped working while it was connected to my nokia mobile modem through usb. It stopped with power swich staying on and no response to clicking off, no irregular sound, nothing but just a blank screen. I disconnected the power and battery quickly but power switch did not respond at all and even the power indicator didn't turn on again. the display was also gone after disconecting the power and removing battery. It has no response or any sign of power while both battery and power supply are working. What do you think? A completely dead mainboard? Does the MB has any safty board or fuse that could be replaced? Any suggestion will be appreciated, Thank you.

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• PXE boot very slow when PXE server is virtualbox

  - by sqrtsben

  As I read in questions here and on the Internet, PXE and Virtualbox don't seem to like each other too much. My problem is the following: I have a virtualized machine which hosts the DHCP and PXE server for 10 native clients. They are rebooted roughly every 10 mins and on each reboot, they need to boot a small linux (the initrd is ~4MB). Before, I had a native machine running and booting via PXE was very fast. Now, looking at the output of nload, I only get 500kbit/s whenever one machine is booting. The machines are connected via a GBit switch, so that can't be it. Also, when testing the connection speed to the outside, I have the full bandwidth available. Is VBox just unable to deal with large amounts of UDP packets? Can anyone point me in the right direction here?

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• Thunderbird message panes

  - by MarkS

  I have just switched from Outlook to Thunderbird and one feature that I am missing is when I would click a folder it would open a message in the message pane automatically. Now it is always blank. I have it set to remember the last one opened so if I switch back and forth it is there, but if I just click a folder the first time that I invoke it the message pane is blank. The reason I upgraded to 3.0 is because I saw this behavior in 2.0 and thought it would be fixed. I remember setting something in 2.0 that allowed this feature. Is there a way I can downgrade back to 2.0?

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• HD Video Capture Card w/ Good API?

  - by Sheep Slapper

  Does anyone here know of a good HD video capture card that has a good (comprehensive) API? I administer a few servers that do some video encoding right now, but when we make the switch to HD cameras, they won't be sufficient. In addition to this, the servers we have now are black boxes, closed to me except to start/stop the video capture device. I'd like to be able to roll my own, so we can better integrate it with our existing systems, but I know almost nothing about what kind of HD capture cards are out there, and if I can avoid spending money just to test their APIs that would rock. So does anyone have any experience with this? All our other software is in C#, and I'd like to set up the new servers with web interfaces to start/stop the capture (also in C#, using .NET 3.5 probably). I'm not sure how language specific these APIs would be, but that's what I'm working with just as a reference point. I appreciate any help the community can give!

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• Network bottleneck/throttling issue

  - by Gavin

  Hi all, It's my first day at a new company and i've been given the task to find out an issue with the internet connection. I noticed that whilst I was downloading a large file, the network grinds to a halt, except for my download. At first I thought it was the internet connection/modem but it seems that whilst the lockdown occurs, I am unable to access any network device. Has anyone experienced this before and if so, do you have any pointers? Looking at the setup. They have an DSL modem that connects to a 10/100 switch. There are only 5-6 computers on the network. Cheers Gavin

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• Virtual memory on Linux doesn't add up?

  - by Brendan Long

  I was looking at System Monitor on Linux and noticed that Firefox is using 441 MB of memory, and several other applications are using 274, 257, 232, etc (adding up to over 3 GB of virtual memory). So I switch over to the Resources tab, and it says I'm using 462 MB of memory and not touching swap. I'm confused. What does the virtual memory amount mean then if the programs aren't actually using it. I was thinking maybe memory they've requested but aren't using, but how would the OS know that? I can't think of any "I might need this much memory in the future" function..

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• Adding Blogger template to predefined list

  - by espais

  I am working on updating a Blogger layout for a friend's website, and haven't had much luck in searching for this. Essentially, I want to create the template and show them before pushing it live. At present, there are lists of sample templates (Simple, Dynamic, etc), and I'd like to add mine as a clickable button for them to preview. When I attempt to import it, it is automatically published as the live template...but I don't want it to be seen before they review it. I want them to be able to switch between the current version and my version to see what is preferred. Is this even possible? It would be extraordinarily straightforward in WordPress, but I've never used blogger before...

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• TrueCrypt: Open volume without mounting

  - by Totomobile

  I have a corrupt TrueCrypt volume. When I try to mount it, the password is fine but I get an error: hdiutil attach failed no mountable file systems. I just need to open it without TrueCrypt trying to mount it too, so I can use that partition in a data recovery program. Also it's just an image file volume. I have read the documentation here: http://www.truecrypt.org/docs/?s=command-line-usage But I can't figure out which switch I need to use to only open an image and not mount it. I am using the Mac version, and I have set up an alias for the TrueCrypt shell command, so I can just type: truecrypt -t -v - ?? [][]..

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• IP tables gateway

  - by WojonsTech

  I am trying to make an iptables gateway. I ordered 3 dedicated server from my hosting company all with dual nics. One server has been given all the ip addresses and is connected directly to the internet and has its other nic connected to a switch where the other servers are all connected also. I want to setup iptables so for example the ip address 50.0.2.4 comes into my gateway server it fowards all the traffic to a private ip address using the second nic. This way the second nic can do what ever it needs and can respond back also. I also want it setup that if any of the other servers needs to download anything over the inernet it is able to do so and by using the same ip address that is used for its incomming traffic. Lastly I would like to be able to setup dns and other needed networking stuff that i maybe not thinking about.

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• PCs using certain IP addresses cannot ping out

  - by Steve McCall

  I'm having a very strange problem which I just can't get past. The way our network is set up, we have 2 locations. The main office with all our PCs, and servers/ We are then joined to a local ISP via microwave link and they provide our internet gateway and house an additional storage server for us. All of the network infrastructure is within our office The problem is... When some PCs (and servers) are assigned IP addresses, they cannot ping the gateway or remote server however the remote server can ping the PC. Most of our internal IP addresses work fine but specific ones (e.g. .29) has this problem all the time. There is nothing else using the ip address and no other network problems. When we switch the IP on the PC, it works fine. Please help, I'm going mad. Thanks, Steve

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• Linux openSUSE 11.2 on VAIO Z890T

  - by alfredozn

  I have a VAIO Z-series (VGN-Z890T) and I want to install openSUSE 11.2. I found some guides to fix the problem for the video card switch, but all for older models, those preconfigured with windows vista. It looks like newer model use a different bios configuration to support hot swap between cards in Windows 7 and this change breaks the solution to my problem. I'm not an experienced linux user, but i was using it recently on my old computer ind definitively I want it on my laptop. I installed openSUSE once and i was trying and trying to solve it until I finished reinstall again and use a fresh installation. My question is: Does anyone has installed and configured successfully openSUSE on one of the latest vaio z laptops???

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• forward all mail on a specified domain to script

  - by David

  Hey all! I run a disposable e-mail service that accepts all incoming mail and forwards it to a PHP script that stores it in a database for people to view. Before now, I have been on shared hosting with cPanel, which makes it easy to pipe e-mails to a script. Now, however, I got my own VPS, and it doesn't have cPanel. How do I pipe e-mails to script? Further, how do I pipe emails to any address on certain specified domains to my script? You see, aside from the main domain, there are several alternate domains that people can use if the main domain is blocked, and on each domain I want any address to be usable (xyz@domain, abc@domain, anythingelse@domain). The VPS has Ubuntu 9.04 installed, and I have been experimenting with Postfix, though I can switch to Exim or Sendmail if it is easier.

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• jetty crash trouble shooting

  - by user886356

  Recently I switch to amazon ec2 + jetty9 + oracle jdk7_u45 for cost saving. I found the jetty server is very unstable. It crash randomly without any jvm dump file. Tried to enable stdout with the dumpBeforeStop=TRUE. It won't append the dump messages to stderrout.log before crash. Seems it isn't related to OutOfMemoryError as I have enabled the gc verbose options and found it still has many available memory before crash. : 162604K-3340K(176960K), 0.2240040 secs] 248332K-89101K(373568K), 0.2736860 secs] [Times: user=0.01 sys=0.01, real=0.28 secs] Tried to downgrade to jetty8 with different jdk combination (jdk6 / jdk7). Still got the same problem. Tried to remove all jvm options and using "sudo java -jar start.jar" to run jetty. Still crash. Any other way to shoot the problem?

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• ESXi and Networking Devices

  - by EsxiUser

  I have two intel pro 1000 pt nics. One quad and one dual port. I want to assign all nic ports to a VM. I enabled PCI passthrough on all devices but ESXi will only allow me to add two nic ports until it tells me the maximum number of pci devices have been added. I have also tried setting up a virtual switch but it didn't seem like this would give full access to the nics. What is the best way to setup the nics to the VM has direct access to them? This is for a firewall VM.

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• Juniper Networks SRX240 as a office router?

  - by Jordan Mendelson

  We're a small (7 person) fast growing startup who just got our new office and we're having a 100 Mbps line installed from Cogent. I'm not familiar with Juniper devices, however the equivalent Cisco appears to be rather expensive. Features we'd like: Offsite VPN access (PPTP or L2TP IPsec) - something Mac compatible IPv6 support NAT - ideally supporting multiple outside addresses mapped to VLANs DHCP DNS forwarding would be nice QoS to keep our SIP phones happy (managed through RingCentral) VLANs for guest/internal The device is going to be connected to a set of SIP phones as well as two Ruckus 7962s for wireless access. Eventually I'd like to connect it to a Juniper ESX switch as we grow. Would a Juniper SRX240 handle this ok?

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• Is it possible to disable ARP in Windows 7

  - by DriverGuy

  I have a unique requirement where I need to disable ARP on a Windows 7 box. In previous Windows versions you could modify the ArpRetryCount in the registry (and set it to 0), but this does not work in 7 (nor does it exist). Does anybody know how, or if this is possible? I've been asked to elaborate this more and I'm not quite sure how. I want to switch off ARP (including gratuitous arp) on Windows 7 for a project I'm working on. You can do this in Linux by simply adding '-arp' when you bring up an interface, but you cannot do this in Windows 7. You could in previous versions by modifying the registry, but this does not work any more. If the fine folk here aren't sure then I don't like my chances...

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• How to create Isolated test environment

  - by Safin09

  Hi All, I am very new to the VMware world. We have VMWare vCenter 4 in the production environment but we have created multiple VLAN through Cisco Switch. I want know, how I can create an isolated test environment for software testing purpose only, so anything will happen in that test vLan will not make trouble in the production environment. "Host-only networking" is the solution or there is a better way to achieve this result? My requirements A. Hosts should be able to access Internet and a Network Share drive but not Production network B. Hosts should connect each other inside the Virtual LAN C. I should be able to take automatic or periodic backup or snapshoot and deploy snapshot when necessary. Whatever your answer is, please give me steps, how to do, if possible. If I need to purchase anything, I am ready to do but I don't want to spend big money. Many thanks in advance.

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• When i log on then i get annyoing cmd windows in windows7

  - by user191542

  I am using windows 7 on my office PC and that is linked with Active directory. I dont't know what happend if installed something few days ago many small softwares. I don't know if there was some virus or something but anti virus didn't tell anything. Now when i log ion then i keep getting many cmd screen opening and closing and i can't do anything. If i switch user and log with my admin acount then it also happens again witha dmin account. Now when again if i go back to old screen by switching user. then annoying cmd windows are not there. i want to know how can i fix that I managed to get print screen of that

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• Windows 2003 Cluster: Failover Delay

  - by Ramon Marco Navarro

  I am testing the failover policies of our test failover cluster system. When I shutdown the node who is currently controlling the cluster (NODE1), it takes about 2 mins and 40 seconds before the next node on the preferred list (NODE2) takes control of the cluster. I tried changing the looksAlive and isAlive interval to 5000ms to all resources, but that didn't help. Looking at the Event Viewer of the remaining nodes, it shows that it was almost instantly detected that NODE1 was down. But it took another ~2:40 minutes for it to be removed from the live cluster list and for NODE2 to take over. Is there anyway of changing or shortening this "failover delay"? This is the setup of the cluster: (1) One ClusterDC connected to the public network (3) Three nodes running Win2003 with a quorum type of MNS Private network is connected to network hub ________________ _________________ (ClusterDC)=------=| |=------=(Node1)=------=| | |Public Network|=------=(Node2)=------=|Private Network| | (Switch) |=------=(Node3)=------=| (Hub) | ---------------- -----------------

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• Multiple home routers

  - by netvope

  Suppose I have the following configuration: Router A: WAN port connected to the Internet, LAN = 192.168.1.0/24 Computer A: Connected to router A as 192.168.1.101 Router B: WAN port connected to router A as 192.168.1.102, LAN = 192.168.2.0/24 Computer B: Connected to router B as 192.168.2.101 Now I want computer A to communicate with computer B seamlessly (e.g. can establish a TCP connection by running nc 192.168.2.101 <port>) by means of routing, rather than merging the two networks into one (which can be easily accomplished using router B as a switch). Most routers are shipped with NAT turned on, of which I definitely need to turn off in router B. But what other steps do I need to take so that packets from computer A to computer B would go through router B? I could manually add a routing table entry in computer A so that all packets targeted to 192.168.2.0/24 go through gateway 192.168.1.102, but I would prefer an automatic way if it exist.

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• Multiple home routers

  - by netvope

  Suppose I have the following configuration: Router A: WAN port connected to the Internet, LAN = 192.168.1.0/24 Computer A: Connected to router A as 192.168.1.101 Router B: WAN port connected to router A as 192.168.1.102, LAN = 192.168.2.0/24 Computer B: Connected to router B as 192.168.2.101 Now I want computer A to communicate with computer B seamlessly (e.g. can establish a TCP connection by running nc 192.168.2.101 <port>) by means of routing, rather than merging the two networks into one (which can be easily accomplished using router B as a switch). Most routers are shipped with NAT turned on, of which I definitely need to turn off in router B. But what other steps do I need to take so that packets from computer A to computer B would go through router B? I could manually add a routing table entry in computer A so that all packets targeted to 192.168.2.0/24 go through gateway 192.168.1.102, but I would prefer an automatic way if it exist.

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• AutoCAD 11 and network file shares

  - by gravyface

  Small network of perhaps half a dozen engineers, currently working on local copies of AutoCAD project files, which are then copied back up to file server (2008 Standard, 1-2 year old Dell server hardware, RAID 5 SAS disks (10k? not positive)) at end of day. To me, this sounds horribly inefficient and error-prone, however, I've been told that "AutoCAD and network files = bad idea" and this is gospel. The network is currently 10/100 (perhaps this is the reason for the "gospel") but all the workstations are within 2 years old and have GbE NICs so an upgrade of the core switch is long overdue. However, I know certain applications don't like network access, at all, and any sign of latency or disruption brings the whole thing crashing down. Anyone care to chime in?

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