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Articles indexed Friday June 28 2013

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• Trouble with local id / remote id configuration of VPN

  - by Lynn Owens

  I have a NetGear UTM firewall and a Windows machine running NetGear's VPN client. The Windows machine I can put on the UTM network and take off of it. When I am cabled into the local (internal) the following configuration works: UTM: Local Id: Local Wan IP: (The UTM's WAN IP address) Remote Id: User FQDN: utm_remote1.com Client: Local Id: DNS: utm_remote1.com Remote Id: (The UTM's WAN IP address) Gateway authentication: preshared key Policy remote endpoint: FQDN: utm_remote1.com But when I'm off the UTM's internal local network and simply coming in from the internet, this does not work. It simply repeats SEND phase 1 before giving up. Since I know that the UTM WAN IP is accessible from both inside and outside the network, I figured the problem was with the Client local id. So, I tried the following: UTM: Local Id: Local Wan IP: (The UTM's WAN IP address) Remote Id: (A DN of a self-signed certificate I created for the client and uploaded into the UTM certificates) Client: Local Id: (The DN of the aforementioned self signed cert) Remote Id: (The UTM's WAN IP address) Gateway authentication: (the aforementioned self signed cert) Policy remote end point: ... er, ... my choices are IP and FQDN.... Not sure what to put here No matter what I've tried, it just keeps repeating the SEND phase 1. Any ideas?

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• How to use instances with s3 load balancing?

  - by Slay

  I have some questions about instances and load balancing in amazon s3. I can configured an instances in s3, but i do not understand how to deal with many instances in s3. Currently, my instance is loaded with mysql, php etc (ALL IN ONE). However how do i ensure my instances is scaling? E.g if i have a site that is suppose to be handled using 3 instances and using amazon rds. Do i need to host my code base in the 3 instances? how do people normally do this? like facebook has 1000+ servers. Do they host their code base in all the 1000+ servers? Thanks

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• "Couldn't resolve host" for any external content

  - by scatteredbomb

  On our site we run a few different scripts for various sites (uploading to amazon s3, data from chartbeat, script to count twitter followers) and all of them just stop working from time to time. They work most days, but then some days (like today) they all just stop working. This simple script to get follower count into PHP $url = "http://twitter.com/users/show/username"; $response = file_get_contents ( $url ); $t_profile = new SimpleXMLElement ( $response ); $count = $t_profile->followers_count; Just sits there for a couple minutes, then finally spits out an error that says "Couldn't resolve host". Any script we use for an external site gives us this error. I'm not really sure where to check what's blocking these connections all of a sudden, and why it seems to work most times, then doesn't for a day or so, then works again. Any tips? Update: Contents of resolv.conf search 147.225.210.rdns.ubiquityservers.com nameserver 72.37.224.5 nameserver 72.37.224.6

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• Configuring port forwarding for SSH - no response outside LAN [migrated]

  - by WinnieNicklaus

  I recently moved, and at the same time purchased a new router (Linksys E1200). Prior to the move, I had my old router set up to forward a port for SSH to servers on my LAN, and I was using DynDNS to manage the external IP address. Everything worked great. I moved and set up the new router (unfortunately, the old one is busted so I can't try things out with it), updated the DynDNS address, and attempted to restore my port forwarding settings. No joy. SSH connections time out, and pings go unanswered. But here's the weird part (i.e., key to the whole thing?): I can ping and SSH just fine from within this LAN. I'm not talking about the local 192.168.1.* addresses. I can actually SSH from a computer on my LAN to the DynDNS external address. It's only when the client is outside the LAN that connections are dropped. This surely suggests a particular point of failure, but I don't know enough to figure out what it is. I can't figure out why it would make a difference where the connections originate, unless there's a filter for "trusted" IP addresses, which is perhaps just restricted to my own. No settings have been touched on the servers, and I can't find any settings suggesting this on the router admin interface. I disabled the router's SPI firewall and "Filter anonymous traffic" setting to no avail. Has anyone heard of this behavior, and what can I do to get past it?

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• Why Hebrew letters in the address bar break the ARR gateway (Only With Explorer 8,9,10)?

  - by Noamway

  The ARR is working great in all browsers except Internet Explorer 8,9,10. When I paste Hebrew URL directly to the address bar it's working good, but when I surf (click on a simple href URL) from one Hebrew URL page to another Hebrew URL the ARR return me that error: "502 - Web server received an invalid response while acting as a gateway or proxy server." There is a problem with the page you are looking for, and it cannot be displayed. When the Web server (while acting as a gateway or proxy) contacted the upstream content server, it received an invalid response from the content server. I checked it number of times including with HTTP analyzer and I saw that the "referer" is making all the problems and cause to that error. For example when I enter to that page: mydomain.com/somehebrewchars (mydomain.com/???? you will need Hebrew install) And click in the page on a link to: mydomain.com/somehebrewchars2 (mydomain.com/???????? you will need Hebrew install) I will get the error above and when you look at the referrer you will see something like that: mydomain.com/עמוד-× ×—×™×ª×” We use other proxies application to others projects and we don't have the same issue like that. For this example we used WIN 2008 and 2012 with ARR 2.5 and also 3 beta. Any help is welcome :-) Thanks, Noam

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• Remote Sending of Emails via SMTP/EXIM Issue

  - by Christian Noel

  I have been encountering a problem when sending messages via EXIM. Here is the scenario: I have 2 servers lets just say host1.com = where all my apps and programs are hosted. host2.com = is another server which handles some apps but is also my smtp mail server. whm and cpanel are installed in both hosts as well as exim. right now, messages are being sent out as [email protected] to clients. host1.com uses the [email protected] so that it can send messages outbound as well. here's the problem, after a few hours from a fresh reboot of host1.com, sending messages from host1.com is no longer possible because i encounter an error that states: system/vendor/swift/Swift/Connection/SMTP.php [309]: The SMTP connection failed to start [tls://mail.host2.com]: fsockopen returned Error Number 110 and Error String 'Connection timed out'` also note that this was working fine earlier (like 10 hours ago) but then it suddenly fails. everytime i restart the host1.com then sending messages will work again. i have checked logs and traces but to no avail the only means of fixing this problem is restarting host1.com.

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• HA for Resque & Redis

  - by Chris Go

  Trying to avoid SPOFs for Resque and Redis. Ultimately the client is going to be PHP via (https://github.com/chrisboulton/php-resque). After going through and finding some workable HA for nginx+php-fpm and MySQL (mysql master-master setup as a way to simply master-slave promotion), next up is Resque+Redis. Standard install of Resque uses localhost Redis (at DigitalOcean). I am heavily depending on Amazon Route 53 DNS failover to try to solve this. resque1.domain.com points to localhost redis (redis1.domain.com) = same server resque2.domain.com points to localhost redis (redis2.domain.com) = same server Do resque.domain.com with FAILOVER resque1 as primary and resque2 as secondary. What this means is that most of the time (99%), resque1 should be getting hit with resque2 as just a hot backup. This lets me just have to get 2 servers and makes sure that any hits to resque.domain.com goes somewhere The other way to do this is to break out resque and redis into 4 servers and do it as follows resque1.domain.com - redis.domain.com resque2.domain.com - redis.domain.com redis1.domain.com redis2.domain.com Then setup DNS Failover resque.domain.com - primary: resque1 and secondary: resque2 redis.domain.com - primary: redis1 and secondary: redis2 I'd like to get away for 2 servers if I can but is this 2nd setup much better or negligible? Thanks, Chris

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• I am unable to get the subdomain from the URL in NGINX

  - by Jean-Nicolas Boulay Desjardins

  I am unable to get the subdomain from the URL in NGINX. Here is my config: server { listen 80; server_name ~^(?<appname>)\.example\.com$; rewrite ^ https://$appname.example.com$request_uri? permanent; } When I do: http://bob.example.com/ I am sent to: https://.example.com/ I don't know what I am doing wrong. I am using NGiNX 1.2.7. I have another config for the: http://example.com/ So I have one server block for the domain without the subdomain and the second with the subdomain... This is about the subdomain.

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• Using bind (named) as a public proxy server

  - by TrentDavis

  We have a Python DNS server that does a bunch of stuff to figure out values it should return for various DNS records. This works nicely, however as it is Python, the performance under high load won't be great. What I would like to do is have a "proxy" bind server sit in front of it to return results to the public internet. This will cache the results (typically 15 minutes, some records are a few seconds), so the load on the Python server will be greatly reduced as it will only see one look up per domain (only about 100 domains) every 15 minutes. The data in these domains changes a lot, so using a master won't work as it will constantly be changing. I have something setup that looked like it would work great (using a forwarder for the zone), and tested it with dig etc, all going great. However when we went to go live with it, things weren't working, and we figured out that named is not setting the "Authoritative" bit (fair enough, it is a forwarder). So my question is, can we tell bind to set the Authoritative bit for forwarded domains? I have looked at all the doco I can find, and can't find anything about doing things this way. Most of the doco about using it as a proxy if for a LAN to the internet. Ideally I would like to use bind as it is there and installed (CentOS 5 servers). But at a pinch we could look at a different name server to do the work if it just can't be done with bind. Thanks.

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• mysql master-master setup as a way to simply master-slave promotion

  - by Chris Go

  I'm trying to see if the following plan is viable. Goal here is to be able to do HA (uptime) and not necessarily for load -- writes are fine on one MySQL 5.5 server (with innodb) but not really possible when the database is down. Currently, I have a master-slave replication setup which works fine except it doesn't have automatic promotion (obviously). what I am planning on doing is setup master-master replication to possibly do this "automatic promotion" using Amazon Route 53 DNS Failover (Health checks). What I am trying to avoid is to NOT have to do the auto-increment trick because the "business folks" got used to the auto-incrementing PK as consecutive numbers (yeah, I know this is bad but data is from 2004). So, setup the master-master replication WITHOUT the auto-increment collision prevention bit. The primary master is db1.domain.com and secondary master is db2.domain.com In Amazon Route 53, setup DNS Failover record for db.domain.com - primary failover is db1.domain.com - with a TCP healthcheck on IP address port 3306 - secondary failover is db2.domain.com - with a TCP healthcheck on IP address port 3306 Most of the time (99%), unless tcp://db1.domain.com:3306 is dead, db1.domain.com will be served up on DNS hits to db.domain.com. In fact, hopefully this is 100%. The possible downsides of this is the loss of a primary key (collision) and I think I am OK with losing one order. We are a low data volume B2B business and can just call our client up if this occurs (like an order disappearing). Does this sound like a good plan? Then I will also run another slave replication on db1.domain.com as "master" to a slave-db1.domain.com -- not sure why, maybe for heavy SELECTs?

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• Spanning-tree setup with incompatible switches

  - by wfaulk

  I have a set of eight HP ProCurve 2910al-48G Ethernet switches at my datacenter that are set up in a star topology with no physical loops. I want to partially mesh the switches for redundancy and manage the loops with a spanning-tree protocol. However, our connection to the datacenter is provided by two uplinks, each to a Cisco 3750. The datacenter's switches are handling the redundant connection using PVST spanning-tree, which is a Cisco-proprietary spanning-tree implementation that my HP switches do not support. It appears that my switches are not participating in the datacenter's spanning-tree domain, but are blindly passing the BPDUs between the two switchports on my side, which enables the datacenter's switches to recognize the loop and put one of the uplinks into the Blocking state. This is somewhat supposition, but I can confirm that, while my switches say that both of the uplink ports are forwarding, only one is passing any real quantity of data. (I am assuming that I cannot get the datacenter to move away from PVST. I don't know that I'd want them to make that significant of a change anyway.) The datacenter has also sent me this output from their switches (which I have expurgated of any identifiable info): 3750G-1#sh spanning-tree vlan nnn VLAN0nnn Spanning tree enabled protocol ieee Root ID Priority 10 Address 00d0.0114.xxxx Cost 4 Port 5 (GigabitEthernet1/0/5) Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Bridge ID Priority 32mmm (priority 32768 sys-id-ext nnn) Address 0018.73d3.yyyy Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Aging Time 300 sec Interface Role Sts Cost Prio.Nbr Type ------------------- ---- --- --------- -------- -------------------------------- Gi1/0/5 Root FWD 4 128.5 P2p Gi1/0/6 Altn BLK 4 128.6 P2p Gi1/0/8 Altn BLK 4 128.8 P2p and: 3750G-2#sh spanning-tree vlan nnn VLAN0nnn Spanning tree enabled protocol ieee Root ID Priority 10 Address 00d0.0114.xxxx Cost 4 Port 6 (GigabitEthernet1/0/6) Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Bridge ID Priority 32mmm (priority 32768 sys-id-ext nnn) Address 000f.f71e.zzzz Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Aging Time 300 sec Interface Role Sts Cost Prio.Nbr Type ------------------- ---- --- --------- -------- -------------------------------- Gi1/0/1 Desg FWD 4 128.1 P2p Gi1/0/5 Altn BLK 4 128.5 P2p Gi1/0/6 Root FWD 4 128.6 P2p Gi1/0/8 Desg FWD 4 128.8 P2p The uplinks to my switches are on Gi1/0/8 on both of their switches. The uplink ports are configured with a single tagged VLAN. I am also using a number of other tagged VLANs in my switch infrastructure. And, to be clear, I am passing the tagged VLAN I'm receiving from the datacenter to other ports on other switches in my infrastructure. My question is: how do I configure my switches so that I can use a spanning tree protocol inside my switch infrastructure without breaking the datacenter's spanning tree that I cannot participate in?

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• backup and restoration of a freeipa infrastructure

  - by Sirex

  I'm finding the documentation on ipa server backup and restoration sadly lacking, and being so centrally critical it's not something i'm really happy about shooting in the dark with - could some kind soul more knowledable in the matter please attempt to provide an idiot-proof guide to backing up and restoring of IPA server(s) ? Particularly the main server (the cert signing one). ...We're looking towards rolling out ipa in a two server setup (1 master, 1 replica). I'm using dns srv records to handle failover, hence a loss of the replica isn't a big deal as i could make a new one and force a resync to happen - it's losing the master that bothered me. The thing that i'm really struggling with is locating a step-by-step procedure for backing up and restoring the master server. I'm aware that whole-VM snapshot is the recommended way of doing IPA server backup, but that isn't an option at this time for us. I'm also aware that freeipa 3.2.0 includes some sort of backup command build in, but that isn't in the ipa version of centos, and i don't expect it will be for some time yet. I've been trying many different methods, but none of them seem to restore cleanly, amongst others, i've tried; a command similar to db2ldif.pl -D "cn=directory manager" -w - -n userroot -a /root/userroot.ldif the script from here to produce three ldif files -- one for the domain ({domain}-userroot), and two for the ipa server (ipa-ipaca and ipa-userroot): Most of the restores i've tried have been similar to the form of: ldif2db.pl -D "cn=directory manager" -w - -n userroot -i userroot.ldif which seems to work and reports no errors, but totally borks the ipa install on the machine and i can no longer login with either the admin password on the backed up server, or the one i set it to on installation before attempting the ldif2db command (i'm installing ipa-server and running ipa-server-install, then attempting the restore). I'm not overly bothered about losing the CA, having to rejoin the domain, losing replication etc etc (although it'd be awesome if that could be avoided) but in the instance of the main server dropping i'd really like to avoid having to re-enter all the user/group information. I guess in the instance of losing the main server i could promote the other one and replicate in the other direction, but i've not tried that, either. Has anyone done that ? tl;dr: Can someone provide an idiots guide to backing up and restoring an IPA server (preferably on CentOS 6) in a clear enough way that'd make me feel confident it'll actually work when the dreaded time comes ? Crayons are optional, but appreciated ;-) I can't be the only person struggling with this, seeing how widely used IPA is, surely ?

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• SSH tunneling with Synology

  - by dvkch

  I try to tunnel SMB and AFP services through SSH to acces my NAS shares on my machine. I already do it successfully with my ReadyNAS using the following command line (ran as my user on my mac) : ssh -Nf -p 22 -c 3des-cbc USER@SERVER -L 8888/127.0.0.1/548 -L 9999/127.0.0.1/139 but I cannot reproduce the same with the Synology NAS. Connecting using this command gives me the following error : channel 4: open failed: administratively prohibited: open failed I also tried with a windows client (used bitvise tunneler): it works with the ReadyNAS but not the Synology and get the following error msg : server denied request for client-side server-2-client forwarding on 127.0.0.1:139 I modified /etc/ssh/sshd_config : MaxSessions 10 PasswordAuthentication yes PermitEmptyPasswords no AllowTcpForwarding yes GatewayPorts yes PermitTunnel yes Is there any way to make it work ? I must add that I can successfully connect via SSH to the NAS so I donnot think this is a firewall issue between the Synology and my computer. Thanks for you answers

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• OpenBSD pf 'match in all scrub (no-df)' causes HTTPS to be unreachable on mobile network

  - by Frank ter V.

  First of all: excuse me for my poor usage of the English language. For several years I'm experiencing problems with the 'match in all scrub (no-df)' rule in pf. I can't find out what's happening here. I'll try to be clear and simple. The pf.conf has been extremely shortened for this forum posting. Here is my pf.conf: set skip on lo0 match in all scrub (no-df) block all block in quick from urpf-failed pass in on em0 proto tcp from any to 213.125.xxx.xxx port 80 synproxy state pass in on em0 proto tcp from any to 213.125.xxx.xxx port 443 synproxy state pass out on em0 from 213.125.xxx.xxx to any modulate state HTTP and HTTPS are working fine. Until the moment a customer in France (Wanadoo DSL) couldn't view HTTPS pages! I blamed his provider and did no investigation on that problem. But then... I bought an Android Samsung Galaxy SII (Vodafone) to monitor my servers. Hours after I walked out of the telephone store: no HTTPS-connections on my server! I thought my servers were down, drove back to the office very fast. But they were up. I discovered that disabling the rule match in all scrub (no-df) solves the problem. Android phone (Vodafone NL) and Wanadoo DSL FR are now OK on HTTPS. But now I don't have any scrubbing anymore. This is not what I want. Does anyone here understand what is going on? I don't. Enabling scrubbing causes HTTPS webpages not to be loaded on SOME ISP's, but not all. In systat, I strangely DO see a state created and packets received from those ISP's... Still confused. I'm using OpenBSD 5.1/amd64 and OpenBSD 5.0/i386. I have two ISP's at my office (one DSL and one cable). Affects both. This can be reproduced quite easily. I hope someone has experience with this problem. Greetings, Frank

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• Sizing a Virtual Server

  - by vdubs

  I would like to replace four aging physical servers with one virtual server. What is the best way to insure the VM server is sized correctly? The requirements of the apps that will be running on the four servers are APPLICATION SERVERS - QTY 3 - These will run the application layer for the web server, Business Objects Business Intelligence app, and various other small client server apps. The three most heavy hitting apps each have the following server requirements. So, if I bought three physical servers, this would be the requirements for each of them Processor - Dual 2.83 GHZ (or faster) Ram - 4 GB Raid 5 - 50-100GB usable space NIC - 1 GB Web Server - this will run one asp.net e-business app that will talk to our dedicated SQL server and the three app servers above. The E-Business software has these requirements for the web server Processor - Quad 2.83 GHZ (or faster) Ram - 8 GB Raid 5 - 50-100GB usable space NIC - 1 GB What is the best tool to determine what I need from a hardware standpoing in a virtual server? I am planning on using VMWare.

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• How to copy directories using debugfs?

  - by tjbp

  The debugfs manpage gives the impression that the command 'rdump . .' will recursively copy all files found on the specified filesystem from the debugfs cwd to the native filesystem's cwd. Instead I seem to receive a syntax error, and no copy is initiated? These are the commands I run: cd /path/to/transfer/destination debugfs /dev/sda1 -R rdump . . My task is to copy the entire contents of a clean yet unmountable USB storage device to its host machine's HD. The host machine does not support the inode size used by the USB device's filesystem (256) and its software is not upgradeable, so my intention was to use debugfs to transfer the files. If anyone has any other suggestions for this task I'd be grateful.

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• Running 'sudo' over SSH

  - by Wesho

  I'm writing a script which is to log onto a bunch of remote machines and run a command on them. I've set up keys so the user running the script does not have to type the password of each machine, but only type in the passphrase in the beginning of the script. The problem is that the command on the remote machines requires sudo to run. And at the same time the whole point of the script is to rid the user of having to type in passwords multiple times. Is there way to avoid typing in the password for sudo? Changing permissions of the command on the remote machines is not an option.

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• Resetting TCP/IP Settings on Windows 8

  - by cpx

  Apparently, there's a command: netsh int ip reset which is known to reset TCP/IP settings for Windows XP/Vista/7 and I'm not sure how it works correctly on Windows 8. When I typed the command under command prompt (Admin) I got two errors as pointed out in the screenshot: Resetting , failed. Access is denied. At the end it said Resetting , OK! So, how do I confirm if it worked or not?

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• Configuring port forwarding for SSH - no response outside LAN

  - by WinnieNicklaus

  I recently moved, and at the same time purchased a new router (Linksys E1200). Prior to the move, I had my old router set up to forward a port for SSH to servers on my LAN, and I was using DynDNS to manage the external IP address. Everything worked great. I moved and set up the new router (unfortunately, the old one is busted so I can't try things out with it), updated the DynDNS address, and attempted to restore my port forwarding settings. No joy. SSH connections time out, and pings go unanswered. But here's the weird part (i.e., key to the whole thing?): I can ping and SSH just fine from within this LAN. I'm not talking about the local 192.168.1.* addresses. I can actually SSH from a computer on my LAN to the DynDNS external address. It's only when the client is outside the LAN that connections are dropped. This surely suggests a particular point of failure, but I don't know enough to figure out what it is. I can't figure out why it would make a difference where the connections originate, unless there's a filter for "trusted" IP addresses, which is perhaps just restricted to my own. No settings have been touched on the servers, and I can't find any settings suggesting this on the router admin interface. I disabled the router's SPI firewall and "Filter anonymous traffic" setting to no avail. Has anyone heard of this behavior, and what can I do to get past it?

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• Prefix files with the current directory name using Powershell

  - by XST

  I have folders with images (*.png and *.jpg) >C:\Directory\Folder1 01.png 02.png 03.jpg 04.jpg 05.png And I want to rename all the files like this using powershell: >C:\Directory\Folder1 Folder1 - 01.png Folder1 - 02.png Folder1 - 03.jpg Folder1 - 04.jpg Folder1 - 05.png So I came up with this simple line: Get-ChildItem | Where-Object { $_.Extension -eq ".jpg" -or $_.Extension -eq ".png"} | rename-item -newname {$_.Directory.Name +" - " + $_.Name} If I have 35 or less files in the folder, I will have the wanted result, but if there is 36 or more files, I will end up with this: >C:\Directory\Folder1 Folder1Folder1Folder1 - 01.png Folder1Folder1Folder1 - 02.png Folder1Folder1Folder1 - 03.jpg Folder1Folder1Folder1 - 04.jpg Folder1Folder1Folder1 - 05.png The loop stops when the file's name exceeds 248 characters. Any ideas why it's looping?

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• Can I fix memory leaks in browsers? (Win7 64bit IE9 Chrome)

  - by Randy

  I have a habit of opening websites in their own window, then getting interested in something else in another window while leaving the first window open with the intention of returning to finishing reading. Sometimes I'll leave browser windows open for quite a while. When I do, the browser locks-up gigs of memory until it uses so much, IE will no longer respond. I've seen one browser window use up over 2 gigs just sitting there doing nothing. Chrome appears to do it too, but it doesn't use nearly as much as IE. Is there a way to stop this? Any ideas what may be causing it? Is it a problem with the OS or the browsers? Any insight is appreciated.

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• unzip file on small drive

  - by David Oneill

  I have a zip file that contains many files. Each file in the zip file is about 100MB, and is compressed about 10% (IE it is about 90MB in the zip file). The whole zip file is 20GB, and I'm trying to unzip it onto a drive that has only 30GB free. On Windows 7, how can I unzip a zip file on my laptop's harddrive that doesn't have enough space for both the zipped and unzipped copies of the file? IE can I tell windows to remove stuff from the zip file as it is uncompressed?

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• There's a stray current flowing from my monitor through the VGA cable to the PC. Is this safe?

  - by EApubs

  I have two monitors in my machine. One is an old LCS samsung monitor. Recently, I started to hear a small hum in my speakers (subwoofer) and replaced them. The new one also got the issues then I found our that its a grounding issue. I unplugged the PC's power chord. The monitor is still switched on. When I checked, there's current in the earth pin (ground pin). When I unplug the monitor, there's no current and the speaker is normal. Now, I have moved that monitor to my dad's machine and took his monitor. My question is, is it a big issues? The house's earthing system is working and its grounding the current. I won't feel it if I touch the machine like in many other cases. But still, is it good to keep that monitor attached to my machine? Can it harm the computer? What should I do?

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• Dual boot - disk partition issues basic vs dynamic disk

  - by dboyd68

  I have a lenovo X1 that I am looking to dual boot windows and ubuntu on. I am having an issue. The disk came with 4 partitions SYSTEM_DRV, Windows C:, Lenovov Recovery, Hibernate Partition I have a SSD (250 gb) I have shrunk Windows C: so that I have 100gb of unallocated space. My plan was to install ubuntu on that. But when I try to create a new partition to install ubuntu on. Windows is saying I have to convert to a dynamic disk. I don't really understand the difference between Dyanimc and Basic disk but a quick search I am assuming I dont want to do this as I boot from this disk? Any suggestions on what I can do to dual boot? Thanks

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• Windows XP: GNU find.exe moved my files and now they're lost

  - by user2001487

  I used a series of GNU find.exe commands to move media files to the current folder. Explorer show that the folders and files still exist in their original location but properties show zero size and files. I performed a chkdisk and that didnt help. Any ideas how to recover these files? Here are the commands from my bat file. find.exe . -mindepth 1 -name "*.mkv" -type d -exec mv {} {}.tmp ; find.exe . -mindepth 2 -type f -exec mv {} . ; find.exe . -mindepth 1 -type d -exec rmdir {} ; http://i.stack.imgur.com/Eiq2y.jpg http://i.stack.imgur.com/E1wSN.jpg

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