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  • Sparc Solaris 2.6 will not boot

    - by joshxdr
    I have a very old Sparc Solaris network that was working fine last week, but after a power outage none of the workstations will boot. The network looks like this: host A: solaris 2.6, shares /export/home to network by NFS host B: solaris 8, runs NIS server. Mounts /export/home/ by NFS. host C: RHEL5, shares /share to network by NFS. Mounts /export/home/ by NFS. I figured that the main problem was host A, since you need the home directories available for the other workstations to boot(?). Host A does not mount anything by NFS as far as I know. However, this workstation will NOT boot. The OBP bootup sequence looks like this: Boot device <blah> configuring network interface le0 Hostname <hostname> check file system <everything ok> check ufs filesystem <everything ok> NIS domainname is <name> starting router discovery starting rpc services: rpcbind keyserv ypbind done setting default interface for multicast: add net 224.0.0.0: gateway <hostname> <HANGS at this point> Is there some kind of debug mode so that I can get more detail as to why the workstation won't boot? Is my network structure inherently susceptible to power outage? Is there a way I can boot up to command line so I can at least turn off the NFS mounting?

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  • Video card not detected in POST on initial boot.

    - by Jeff M
    I have a minor problem with my desktop computer after cleaning it out for dust. When I first boot up the computer, the video card does not get detected so I can't see anything. In POST, I'm getting the "can't detect video card" beeps. The boot sequence continues normally, just without video. However, if I restart it (using the restart button) anytime after POST, it would boot up normally. I have no reason to think that the motherboard, video card or PSU got damaged in the process. It was working fine before, works fine after resetting. Took all the necessary precautions while cleaning. On the initial boot, I can hear the video card's fan power up but immediately power down and try again one more time only to fail. After the beep, resetting gets everything running and sounding normally. I've reseated the card a couple of times and reset the BIOS but doesn't seem to help. I'm hoping I won't have to take it out and remove and reinstall everything again. Does anyone recognize these symptoms to know exactly what the problem is? My guess is that the video card isn't getting enough juice initially to be running stable to be detected. I just don't know what I did (or didn't do) to get it to be in this state. It's not a high priority thing for me at the moment, just means I have to always reset it after initially turning it on but will eventually remove everything and reinstall if it comes to that. I don't think the specs are relevant here but just in case, here's the relevant stuff: Motherboard: Gigabyte P35-DS3P Video: EVGA GeForce 8600 GTS PSU: Antec True Power Trio 650W Built ~2 years ago, still running well

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  • Dynamic DNS Updates with Wireless and Wired interfaces

    - by Phaedrus
    We have offices full of Windows & Mac users who obtain IP addresses from a Windows DHCP server, which in turn updates Dynamic DNS entries. We are noticing major inconsistencies with the entries, and have found that the problem is occurring more on Macs than on windows, and even more when users are frequently switching from wired to wireless adapter, which makes sense, as this sequence occurs: User enables wired adapter and registers Proper DNS User enables wireless adapter and registers 2nd proper DNS entry user switches off wireless manually and 2nd entry remains improperly until scavenge. Our help desk folks rely heavily (maybe more than they should) on the dynamic entries as part of their business process. For example, the user submits a help desk ticket, and the staff member expects to be able to remote desktop to their machine by hostname, which is hyperlinked in the helpdesk ticketing app. We have implemented multiple solutions & band-aids to different symptoms of the problems such as: Using DNS Reservations for Macintosh PCs Using DNS Scavenging to remove old records Switching from a Cisco DHCP server to the Windows DHCP Server But no matter what we do, it seems impossible to maintain perfect records. Has anyone encountered this problem before? What is industry best practice? Comments & Suggestions are much appreciated, /P

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  • System occasionally hangs boot process with SLES 11

    - by ThaMe90
    I have several (new) systems on which I had to install SLES11 on. However, after a few (though not every) reboots, the system hangs during the boot sequence. It will only continue after I physically press a key on the keyboard. From what I've found in the dmesg log from a failed boot is the following: [ 22.170276] sd 0:0:0:0: [sda] Mode Sense: b7 00 00 08 [ 22.171155] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [ 22.182760] sda: sda1 sda2 sda3 [ 22.383424] sd 0:0:0:0: [sda] Attached SCSI disk [ 22.545372] PM: Marking nosave pages: 000000000009a000 - 0000000000100000 [ 22.545377] PM: Marking nosave pages: 00000000bf780000 - 0000000100000000 [ 22.546217] PM: Basic memory bitmaps created [ 22.590380] PM: Basic memory bitmaps freed [ 22.596284] PM: Starting manual resume from disk [ 22.602319] PM: Resume from partition 8:1 [ 22.602321] PM: Checking hibernation image. [ 22.602479] PM: Error -22 checking image file [ 22.602481] PM: Resume from disk failed. [ 22.718727] kjournald starting. Commit interval 15 seconds [ 22.718960] EXT3-fs (sda3): using internal journal [ 22.718964] EXT3-fs (sda3): mounted filesystem with ordered data mode [ 1555.644404] udevd version 128 started [ 1555.697664] input: Power Button as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input0 [ 1555.707961] ACPI: Power Button [PWRB] I've looked around the internet for the PM: Resume from disk failed. message, but this seems to only be important when restoring the system after a hybernate, i.e. restore from the hdd. But this is not my situation. I only get this after a reboot, as I said before. The timestamp [ 1555.xxxxxx] is only the result of me pressing a key on the keyboard. Any suggestions on how to proceed? As I am getting stuck on this issue.

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  • When ran as a scheduled task, cannot save an Excel workbook when using Excel.Application COM object in PowerShell

    - by Daniel Richnak
    I'm having an issue where I've automated creating an Excel.Application COM object, add some data into a workbook, and then saving the document as an xlsx. This works fine if: I'm already in Powershell interactive host and either run each command in sequence, or execute as a ps1. I run it from cmd.exe, using the syntax: powershell.exe -command "c:\path\to\powershellscript.ps1" I create a scheduled task in Windows 7 / Server 2008 R2, use the above powershell.exe -command syntax, and use the mode "Run only when the user is logged on". It fails when I modify the same scheduled task, but set it to "run whether the user is logged on or not". Here's a sample script that illustrates the problem I'm having: $Excel = New-Object -Com Excel.Application $Excelworkbook = $Excel.Workbooks.Add() $excelworkbook.saveas("C:\temp\test.xlsx") $excelworkbook.close() I have a theory that the COM object fails somehow if my profile isn't loaded / if it's not performed in a command window. Any ideas on which options to choose when creating the scheduled task, or which options to use when creating the Excel object or using the SaveAs() function? Can anybody reproduce this? I've been able to see this behavior on both a Server 2008 R2 machine, and Windows 7. Haven't tried other platforms.

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  • A .NET Developers day with the iPad.

    - by mbcrump
    The Apple iPad is currently getting a lot of buzz because of the app store, the book store and of course iTunes. I had the chance to play with one and this is what I have learned about the device. Let’s get this out of the way first, the iPad is awesome. It is the device for media consumption and casual web browsing. But how does it measure up to those of us with .NET on our brains all days. Let’s find out… Main Screen – you can customize everything on this page. I guess I should replace that image with a C# or VS logo. Its pretty standard stuff if you have an iPhone.   Programming Books If you have a subscription to Safari Books Online, then you are in luck, its very easy to read the books on the iPad. Just fire up Safari web browser and goto the Safari Books Online. The biggest benefit that I can see with the iPad is the ability to read books wherever and not have to worry about purchasing books that I already have the .PDF for. Below is a sample from Code Complete 2nd Edition. Below is a PDF of the ECMA-334 C# Language Specification. As you can see its very readable and you should have no problem reading actual code.   Example of Code shown below: It is however easier to read the PDF and store them with a 3rd party PDF reader. I have seen several for .99 cents or less. You can however switch the screen to vertical to get more viewing space as shown below: I was disappointed with the iBooks application. I could not find a single .NET programming book anywhere. I was able to download the excellent sci-fi book “A memory of Wind” for free though. If I just overlooked them, then please email me with the names and titles. I couldn’t even find a technology category in the categories list. Web Surfing – Technical Sites Below is an example of my site in Safari. The code is very readable and the experience was identical to viewing it in Firefox. I tried multiple programming site and the pages looked great except those that used flash and of course it did not display on those pages.   News Apps - Technical Content The standard NY Times and USA Today looked great, but the Technical Content was lacking. It would probably be better to use Google Reader for online technical news.     YouTube Videos – Technical Content  Since its YouTube, we already know that a lot of technical content exist and it plays great on the iPad. I watched several programming videos and could clearly see the code being written. Taking Technical Notes The iPad comes with a great notepad for taking notes. I found that it was easy to take notes regarding projects that I am currently working on.   Calendar The calendar that ships with the iPad is great for organizing. You can setup exchange server or manually enter the information. Pretty standard stuff.    Random Applications that I like: TweetDeck.   and Adobe Ideas. Adobe Ideas is kinda like SketchFlow except you use your finger to mock up the sketches.  Don’t forget that the iPad is great for any type of podcasting. That pretty much sums it up, I would definitely recommend this device as it will only get better. I believe the iOS4 comes out on the 24th and the iPad will only get more and more apps. You could save a few bucks by waiting for the 2nd generation, but that’s a call that only you can make.

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  • Port knocking via SSH tunnels

    - by j0ker
    I have a server running in my university's internal network. There is only one SSH daemon running which is secured by port knocking with knockd. Works fine if I try to connect from within the internal network. But since the server has no external IP, I have to tunnel into the internal network every time I want to access the server from outside. And since tunneling only works for a single port I cannot do the port knocking as easily as from an internal client. In fact, I don't get it to work at all. What I'm trying is opening tunnels for all the different ports that have to be knocked. Then I send TCP-SYN packets into the tunnels. But that doesn't work even for a single port. If I establish the tunnel on the first port in the knock sequence and send a packet through it, it doesn't reach the server. There is no entry in the log file of knockd, while there should be something like 123.45.67.89: openSSH: Stage 1 (as shown with internal knocks). So I guess, the problem doesn't exist within my knocking script but is a more general one. Are there any known problems with what I'm trying to do? Is it even possible or am I missing something? Thanks in advance!

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  • Wireshark WPA 4-way handshake

    - by cYrus
    From this wiki page: WPA and WPA2 use keys derived from an EAPOL handshake to encrypt traffic. Unless all four handshake packets are present for the session you're trying to decrypt, Wireshark won't be able to decrypt the traffic. You can use the display filter eapol to locate EAPOL packets in your capture. I've noticed that the decryption works with (1, 2, 4) too, but not with (1, 2, 3). As far as I know the first two packets are enough, at least for what concern unicast traffic. Can someone please explain exactly how does Wireshark deal with that, in other words why does only the former sequence work, given that the fourth packet is just an acknowledgement? Also, is it guaranteed that the (1, 2, 4) will always work when (1, 2, 3, 4) works? Test case This is the gzipped handshake (1, 2, 4) and an ecrypted ARP packet (SSID: SSID, password: password) in base64 encoding: H4sICEarjU8AA2hhbmRzaGFrZS5jYXAAu3J400ImBhYGGPj/n4GhHkhfXNHr37KQgWEqAwQzMAgx 6HkAKbFWzgUMhxgZGDiYrjIwKGUqcW5g4Ldd3rcFQn5IXbWKGaiso4+RmSH+H0MngwLUZMarj4Rn S8vInf5yfO7mgrMyr9g/Jpa9XVbRdaxH58v1fO3vDCQDkCNv7mFgWMsAwXBHMoEceQ3kSMZbDFDn ITk1gBnJkeX/GDkRjmyccfus4BKl75HC2cnW1eXrjExNf66uYz+VGLl+snrF7j2EnHQy3JjDKPb9 3fOd9zT0TmofYZC4K8YQ8IkR6JaAT0zIJMjxtWaMmCEMdvwNnI5PYEYJYSTHM5EegqhggYbFhgsJ 9gJXy42PMx9JzYKEcFkcG0MJULYE2ZEGrZwHIMnASwc1GSw4mmH1JCCNQYEF7C7tjasVT+0/J3LP gie59HFL+5RDIdmZ8rGMEldN5s668eb/tp8vQ+7OrT9jPj/B7425QIGJI3Pft72dLxav8BefvcGU 7+kfABxJX+SjAgAA Decode with: $ base64 -d | gunzip > handshake.cap Run tshark to see if it correctly decrypt the ARP packet: $ tshark -r handshake.cap -o wlan.enable_decryption:TRUE -o wlan.wep_key1:wpa-pwd:password:SSID It should print: 1 0.000000 D-Link_a7:8e:b4 - HonHaiPr_22:09:b0 EAPOL Key 2 0.006997 HonHaiPr_22:09:b0 - D-Link_a7:8e:b4 EAPOL Key 3 0.038137 HonHaiPr_22:09:b0 - D-Link_a7:8e:b4 EAPOL Key 4 0.376050 ZyxelCom_68:3a:e4 - HonHaiPr_22:09:b0 ARP 192.168.1.1 is at 00:a0:c5:68:3a:e4

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  • Building My First Computer And Suprise It Isn't Working

    - by BobbShots
    I've had many years of experience working on and around computers, but this was my first foray into building one completely from scratch. So far that foray has been a disaster. My rig is completely assembled, and on its maiden power-up plus many power cycles I noticed three things: There were a few beeps from the BIOS POST upon powering up the first time, but I wasn't paying attention completely to the sequence. However, every time after that there are 0 POST beeps, even after taking off all hardware except the CPU and MB. There was no video being sent to the monitor. I run a HDMI cable from my video card to the monitor. The video card was LOUD. My card is a Sapphire Radeon HD 5870 which is known for not only being a powerhouse, but being pretty quiet. A few times during my power cycles it ran a lot quieter, but most of the time it was just super loud. Can anyone provide help for any of these issues? My MB, CPU, and Video Card are: MB: ASUS P6X58D Premium LGA 1366 Intel X58 SATA 6Gb/s USB 3.0 ATX Intel Motherboard CPU: i7 920 Video Card: Sapphire Radeon HD 5870

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  • Almost All Xenserver Logical Volumes Disappeared - Recovery?

    - by Alex
    We had a hard disc crash of one of two hard discs in a software raid with a LVM on top. The server is running Citrix xenserver. On the hard disk which is still intact, the volume group gets detected well, but only one LV is left. (some hashes replaced by "x") # lvdisplay --- Logical volume --- LV Name /dev/VG_XenStorage-x-x-x-x-408b91acdcae/MGT VG Name VG_XenStorage-x-x-x-x-408b91acdcae LV UUID x-x-x-x-x-x-vQmZ6C LV Write Access read/write LV Status available # open 0 LV Size 4.00 MiB Current LE 1 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:0 root@rescue ~ # vgdisplay --- Volume group --- VG Name VG_XenStorage-x-x-x-x-408b91acdcae System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 4 VG Access read/write VG Status resizable MAX LV 0 Cur LV 1 Open LV 0 Max PV 0 Cur PV 1 Act PV 1 VG Size 698.62 GiB PE Size 4.00 MiB Total PE 178848 Alloc PE / Size 1 / 4.00 MiB Free PE / Size 178847 / 698.62 GiB VG UUID x-x-x-x-x-x-53w0kL I could understand if a full physical volume is lost - but why only the logical volumes? Is there any explanation for this? Is there any way to recover the logical volumes? EDIT We are here in a rescue system. The problem is that the whole server does not boot (GRUB error 22) What we are trying to do is to access the root filesystem. But everything was in the LVM. We have only this: (parted) print Model: ATA SAMSUNG HD753LJ (scsi) Disk /dev/sdb: 750GB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 1 32.3kB 750GB 750GB primary boot, lvm And this 750GB LVM volume is exactly what we see on top. edit2 Output of vgcfgrestore, but from the rescue system, as there is no root to chroot to. # vgcfgrestore --list VG_XenStorage-x-b4b0-x-x-408b91acdcae File: /etc/lvm/archive/VG_XenStorage-x-x-x-x-408b91acdcae_00000.vg VG name: VG_XenStorage-x-x-x-x-408b91acdcae Description: Created *before* executing '/sbin/vgscan --ignorelockingfailure --mknodes' Backup Time: Fri Jun 28 23:53:20 2013 File: /etc/lvm/backup/VG_XenStorage-x-x-x-x-408b91acdcae VG name: VG_XenStorage-x-x-x-x-408b91acdcae Description: Created *after* executing '/sbin/vgscan --ignorelockingfailure --mknodes' Backup Time: Fri Jun 28 23:53:20 2013

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  • sort utility on cyrillic text

    - by Anton
    I have to sort some lines of cyrillic characters and I want to use the sort utility (on MAC OS X 10.6). The problem is that result is incorrect. I take the text into clipboard, then run pbpaste | sort This is plaintext data, and I also tried passing a file to the sort command. My source data is ??????? ????? ???? ???? ?????? ??????? ???????? ?????? ? ????? ??????????????? ?????????? ???? ?????? And after sorting I get ???? ???? ???? ????? ?????? ?????? ?????? ? ????? ??????????????? ??????? ??????? ???????? ?????????? Theese lines aren’t even grouped by first letter. I tried option -d, but then I get an error sort: string comparison failed: Illegal byte sequence sort: Set LC_ALL='C' to work around the problem. sort: The strings compared were \320\321\321\321' and\320\320\320\321\321\320’. Exporting the variable as recommended doesn’t solve the problem. What can I do to use the sort utility for such a task? Any additional info is necessary?

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  • Wireless connection works but the internet is too slow to use in Ubuntu 11.04

    - by Garrin
    The internet is so slow as to be unusable. And I'm not being picky. Even after minutes I can't get my Google home page to load. I tried installing a package through apt-get and was getting rates between 0 and a few hundred bytes/s. That's bytes, not kilobytes! Mostly 0 however (no exaggeration, it spends large amounts of time stalled). And I would go to a speed test web site of some kind but I can't since nothing will load. Briefly put, the laptop I am using was connected to two wireless networks while using Ubuntu 11.04 without any issues before this. It was also connected to a wired network without any issues. It dual boats Windows 7 which has never had any issues, not even with the current wireless network. Just to be clear, on the current wi-fi network, Windows 7 encounters no issues (speedtest.net puts the network speed at 1mb/s) but my network connection in Ubuntu 11.04 is so slow as to literally be unusable. I am unfamiliar with the router except for the fact that it boasts a Rogers logo (that's a large ISP/cable provider in Canada for those not familiar with the land of igloos and polar bears). I am far from the router and some desktop widget I use tells me the signal strength is at 58% (it seems fairly reliable and this would appear to match up with the filled bars in the network icon). I should also mention I'm just renting a room in this house so I'm not the network administrator and while I can access the 192.168.0.1 router page, the password wasn't set to 'password' so it's not much use to me. Here are a bunch of commands I ran which don't tell me a whole lot but I thought might be more instructive to the wise around here: lspci (just showing my network card): 05:00.0 Network controller: Atheros Communications Inc. AR928X Wireless Network Adapter (PCI-Express) (rev 01) This one is self explanatory. PING www.googele.com (216.65.41.185) 56(84) bytes of data. 64 bytes from nnw.net (216.65.41.185): icmp_req=1 ttl=51 time=267 ms 64 bytes from nnw.net (216.65.41.185): icmp_req=2 ttl=51 time=190 ms 64 bytes from nnw.net (216.65.41.185): icmp_req=3 ttl=51 time=212 ms 64 bytes from nnw.net (216.65.41.185): icmp_req=4 ttl=51 time=207 ms 64 bytes from nnw.net (216.65.41.185): icmp_req=5 ttl=51 time=220 ms --- www.googele.com ping statistics --- 5 packets transmitted, 5 received, 0% packet loss, time 4003ms rtt min/avg/max/mdev = 190.079/219.699/267.963/26.121 ms ifconfig eth0 Link encap:Ethernet HWaddr 20:6a:8a:02:20:da UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) Interrupt:42 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:16 errors:0 dropped:0 overruns:0 frame:0 TX packets:16 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:960 (960.0 B) TX bytes:960 (960.0 B) wlan0 Link encap:Ethernet HWaddr 20:7c:8f:05:c6:bf inet addr:192.168.0.16 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::227c:8fff:fe05:c6bf/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:982 errors:0 dropped:0 overruns:0 frame:0 TX packets:658 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:497250 (497.2 KB) TX bytes:95076 (95.0 KB) Thank you

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  • Emacs 24.1: How do I restore i-search Ctrl-Y behavior from older versions?

    - by Eric
    In emacs 24.1, when you do Ctrl-Y in an interactive search, it yanks the kill buffer into the search string ("it pastes the clipboard contents" in any-other-app's language) and tries to match it. In the last 20 versions or so, pressing Ctrl-Y matches the rest of the current line. I have two very common use cases: Match this line, revert the buffer, and search for the line (less often:) Where else is this text in the buffer? I tried modifying /lisp/isearch.el, switching the bindings for isearch-yank-line (which I want) and isearch-yank-kill (which I'm fine binding to the ridiculous \M-s\C-e key sequence). But I don't think this file even gets picked up. But I don't think this file even gets loaded. If I explicitly load it, I still get the 24.1 behavior. Here's my change: (add-hook 'isearch-mode-hook (lambda () (define-key isearch-mode-map "\C-y" 'isearch-yank-line) (define-key isearch-mode-map "\M-s\C-e" 'isearch-yank-kill) )) No change in the behavior. I even tried hacking isearch.el, still no change. This is on Windows btw, but I suspect it doesn't matter. Could someone tell me how I can restore the old binding?

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  • PuTTY inserts random characters during a session

    - by Zachary Polikarpus
    I recently started renting space on a remote server so that I could work on a project. I found that a relatively painless way to access it on a windows machine is through PuTTY. However, there is one thing that has always irked me when using it: for seemingly no reason random characters are sometimes inserted at the cursor. Most of the time it is just a single tilde, but rarely it spits out what looks like some escape sequence ([[^8 or the like). It will only occur when I am focused on the window, whether I am typing or 20 feet away from the keyboard. If left for long enough, it will spit tildes at random intervals (average is about 1 minute). Finally, this behavior seems to be inconsistant when running programs such as nano or the mysql interface: in nano, instead of inserting tildes, it will set marks (ctrl-^); in mysql, lines will become un-editable. My question is this: Has anyone else experienced this sort of behavior in PuTTY? And if so, what can be done to prevent/correct this behavior?

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  • Redirecting or routing all traffic to OpenVPN on a Mac OS X client

    - by sdr56p
    I have configured an OpenVPN (2.2.1) server on an Ubuntu virtual machine in the Amazon elastic compute cloud. The server is up and running. I have installed OpenVPN (2.2.1) on a Mac OS X (10.8.2) client and I am using the openvpn2 binary to connect (in opposition to other clients like Tunnelblick or Viscosity). I can connect with the client and successfully ping or ssh the server through the tunnel. However, I can't redirect all internet traffic through the VPN even if I use the push "redirect-gateway def1 bypass-dhcp" option in the server.conf configurations. When I connect to the server with these configurations, I get a successful connection, but then an infinite series of error messages: "write UDPv4: No route to host (code=65)". Traffic routing seems to be compromised because I am not able to access anything anymore, not even the OpenVPN server (by pinging 10.8.0.1 for instance). This is beyond me. I am finding little help on the web and don't know what to try next. I don't think it is a problem of forwarding the traffic on the server since, first, I have also took care of that and, second, I can't even ping the VPN server locally through the tunnel (or ping anything at all for that matter). Thank you for your help. Here is the server.conf. file: port 1194 proto udp dev tun ca ca.crt cert ec2-server.crt key ec2-server.key # This file should be kept secret dh dh1024.pem server 10.8.0.0 255.255.255.0 ifconfig-pool-persist ipp.txt push "redirect-gateway def1 bypass-dhcp" client-to-client keepalive 10 120 comp-lzo persist-key persist-tun status openvpn-status.log verb 3 And the client.conf file: client dev tun proto udp remote servername.com 1194 resolv-retry infinite nobind persist-key persist-tun ca ca.crt cert Toto5.crt key Toto5.key ns-cert-type server comp-lzo verb 3 Here is the connection log with the error messages: $ sudo openvpn2 --config client.conf Wed Mar 13 22:58:22 2013 OpenVPN 2.2.1 x86_64-apple-darwin12.2.0 [SSL] [LZO2] [eurephia] built on Mar 4 2013 Wed Mar 13 22:58:22 2013 NOTE: OpenVPN 2.1 requires '--script-security 2' or higher to call user-defined scripts or executables Wed Mar 13 22:58:22 2013 LZO compression initialized Wed Mar 13 22:58:22 2013 Control Channel MTU parms [ L:1542 D:138 EF:38 EB:0 ET:0 EL:0 ] Wed Mar 13 22:58:22 2013 Socket Buffers: R=[196724->65536] S=[9216->65536] Wed Mar 13 22:58:22 2013 Data Channel MTU parms [ L:1542 D:1450 EF:42 EB:135 ET:0 EL:0 AF:3/1 ] Wed Mar 13 22:58:22 2013 Local Options hash (VER=V4): '41690919' Wed Mar 13 22:58:22 2013 Expected Remote Options hash (VER=V4): '530fdded' Wed Mar 13 22:58:22 2013 UDPv4 link local: [undef] Wed Mar 13 22:58:22 2013 UDPv4 link remote: 54.234.43.171:1194 Wed Mar 13 22:58:22 2013 TLS: Initial packet from 54.234.43.171:1194, sid=ffbaf343 d0c1a266 Wed Mar 13 22:58:22 2013 VERIFY OK: depth=1, /C=US/ST=CA/L=SanFrancisco/O=Fort-Funst ... ost.domain Wed Mar 13 22:58:22 2013 VERIFY OK: nsCertType=SERVER Wed Mar 13 22:58:22 2013 VERIFY OK: depth=0, /C=US/ST=CA/L=SanFrancisco/O=Fort-Funst ... ost.domain Wed Mar 13 22:58:23 2013 Data Channel Encrypt: Cipher 'BF-CBC' initialized with 128 bit key Wed Mar 13 22:58:23 2013 Data Channel Encrypt: Using 160 bit message hash 'SHA1' for HMAC authentication Wed Mar 13 22:58:23 2013 Data Channel Decrypt: Cipher 'BF-CBC' initialized with 128 bit key Wed Mar 13 22:58:23 2013 Data Channel Decrypt: Using 160 bit message hash 'SHA1' for HMAC authentication Wed Mar 13 22:58:23 2013 Control Channel: TLSv1, cipher TLSv1/SSLv3 DHE-RSA-AES256-SHA, 1024 bit RSA Wed Mar 13 22:58:23 2013 [ec2-server] Peer Connection Initiated with 54.234.43.171:1194 Wed Mar 13 22:58:25 2013 SENT CONTROL [ec2-server]: 'PUSH_REQUEST' (status=1) Wed Mar 13 22:58:25 2013 PUSH: Received control message: 'PUSH_REPLY,route 10.8.0.0 255.255.255.0,topology net30,ping 10,ping-restart 120,ifconfig 10.8.0.6 10.8.0.5' Wed Mar 13 22:58:25 2013 OPTIONS IMPORT: timers and/or timeouts modified Wed Mar 13 22:58:25 2013 OPTIONS IMPORT: --ifconfig/up options modified Wed Mar 13 22:58:25 2013 OPTIONS IMPORT: route options modified Wed Mar 13 22:58:25 2013 ROUTE default_gateway=0.0.0.0 Wed Mar 13 22:58:25 2013 TUN/TAP device /dev/tun0 opened Wed Mar 13 22:58:25 2013 /sbin/ifconfig tun0 delete ifconfig: ioctl (SIOCDIFADDR): Can't assign requested address Wed Mar 13 22:58:25 2013 NOTE: Tried to delete pre-existing tun/tap instance -- No Problem if failure Wed Mar 13 22:58:25 2013 /sbin/ifconfig tun0 10.8.0.6 10.8.0.5 mtu 1500 netmask 255.255.255.255 up Wed Mar 13 22:58:25 2013 /sbin/route add -net 10.8.0.0 10.8.0.5 255.255.255.0 add net 10.8.0.0: gateway 10.8.0.5 Wed Mar 13 22:58:25 2013 Initialization Sequence Completed ^CWed Mar 13 22:58:30 2013 event_wait : Interrupted system call (code=4) Wed Mar 13 22:58:30 2013 TCP/UDP: Closing socket Wed Mar 13 22:58:30 2013 /sbin/route delete -net 10.8.0.0 10.8.0.5 255.255.255.0 delete net 10.8.0.0: gateway 10.8.0.5 Wed Mar 13 22:58:30 2013 Closing TUN/TAP interface Wed Mar 13 22:58:30 2013 SIGINT[hard,] received, process exiting toto5:ttntec2 Dominic$ sudo openvpn2 --config client.conf --remote ec2-54-234-43-171.compute-1.amazonaws.com Wed Mar 13 22:58:57 2013 OpenVPN 2.2.1 x86_64-apple-darwin12.2.0 [SSL] [LZO2] [eurephia] built on Mar 4 2013 Wed Mar 13 22:58:57 2013 NOTE: OpenVPN 2.1 requires '--script-security 2' or higher to call user-defined scripts or executables Wed Mar 13 22:58:57 2013 LZO compression initialized Wed Mar 13 22:58:57 2013 Control Channel MTU parms [ L:1542 D:138 EF:38 EB:0 ET:0 EL:0 ] Wed Mar 13 22:58:57 2013 Socket Buffers: R=[196724->65536] S=[9216->65536] Wed Mar 13 22:58:57 2013 Data Channel MTU parms [ L:1542 D:1450 EF:42 EB:135 ET:0 EL:0 AF:3/1 ] Wed Mar 13 22:58:57 2013 Local Options hash (VER=V4): '41690919' Wed Mar 13 22:58:57 2013 Expected Remote Options hash (VER=V4): '530fdded' Wed Mar 13 22:58:57 2013 UDPv4 link local: [undef] Wed Mar 13 22:58:57 2013 UDPv4 link remote: 54.234.43.171:1194 Wed Mar 13 22:58:57 2013 TLS: Initial packet from 54.234.43.171:1194, sid=a0d75468 ec26de14 Wed Mar 13 22:58:58 2013 VERIFY OK: depth=1, /C=US/ST=CA/L=SanFrancisco/O=Fort-Funst ... ost.domain Wed Mar 13 22:58:58 2013 VERIFY OK: nsCertType=SERVER Wed Mar 13 22:58:58 2013 VERIFY OK: depth=0, /C=US/ST=CA/L=SanFrancisco/O=Fort-Funst ... ost.domain Wed Mar 13 22:58:58 2013 Data Channel Encrypt: Cipher 'BF-CBC' initialized with 128 bit key Wed Mar 13 22:58:58 2013 Data Channel Encrypt: Using 160 bit message hash 'SHA1' for HMAC authentication Wed Mar 13 22:58:58 2013 Data Channel Decrypt: Cipher 'BF-CBC' initialized with 128 bit key Wed Mar 13 22:58:58 2013 Data Channel Decrypt: Using 160 bit message hash 'SHA1' for HMAC authentication Wed Mar 13 22:58:58 2013 Control Channel: TLSv1, cipher TLSv1/SSLv3 DHE-RSA-AES256-SHA, 1024 bit RSA Wed Mar 13 22:58:58 2013 [ec2-server] Peer Connection Initiated with 54.234.43.171:1194 Wed Mar 13 22:59:00 2013 SENT CONTROL [ec2-server]: 'PUSH_REQUEST' (status=1) Wed Mar 13 22:59:00 2013 PUSH: Received control message: 'PUSH_REPLY,redirect-gateway def1 bypass-dhcp,route 10.8.0.0 255.255.255.0,topology net30,ping 10,ping-restart 120,ifconfig 10.8.0.6 10.8.0.5' Wed Mar 13 22:59:00 2013 OPTIONS IMPORT: timers and/or timeouts modified Wed Mar 13 22:59:00 2013 OPTIONS IMPORT: --ifconfig/up options modified Wed Mar 13 22:59:00 2013 OPTIONS IMPORT: route options modified Wed Mar 13 22:59:00 2013 ROUTE default_gateway=0.0.0.0 Wed Mar 13 22:59:00 2013 TUN/TAP device /dev/tun0 opened Wed Mar 13 22:59:00 2013 /sbin/ifconfig tun0 delete ifconfig: ioctl (SIOCDIFADDR): Can't assign requested address Wed Mar 13 22:59:00 2013 NOTE: Tried to delete pre-existing tun/tap instance -- No Problem if failure Wed Mar 13 22:59:00 2013 /sbin/ifconfig tun0 10.8.0.6 10.8.0.5 mtu 1500 netmask 255.255.255.255 up Wed Mar 13 22:59:00 2013 /sbin/route add -net 54.234.43.171 0.0.0.0 255.255.255.255 add net 54.234.43.171: gateway 0.0.0.0 Wed Mar 13 22:59:00 2013 /sbin/route add -net 0.0.0.0 10.8.0.5 128.0.0.0 add net 0.0.0.0: gateway 10.8.0.5 Wed Mar 13 22:59:00 2013 /sbin/route add -net 128.0.0.0 10.8.0.5 128.0.0.0 add net 128.0.0.0: gateway 10.8.0.5 Wed Mar 13 22:59:00 2013 /sbin/route add -net 10.8.0.0 10.8.0.5 255.255.255.0 add net 10.8.0.0: gateway 10.8.0.5 Wed Mar 13 22:59:00 2013 Initialization Sequence Completed Wed Mar 13 22:59:00 2013 write UDPv4: No route to host (code=65) Wed Mar 13 22:59:00 2013 write UDPv4: No route to host (code=65) Wed Mar 13 22:59:01 2013 write UDPv4: No route to host (code=65) Wed Mar 13 22:59:01 2013 write UDPv4: No route to host (code=65) Wed Mar 13 22:59:01 2013 write UDPv4: No route to host (code=65) Wed Mar 13 22:59:02 2013 write UDPv4: No route to host (code=65) Wed Mar 13 22:59:02 2013 write UDPv4: No route to host (code=65) Wed Mar 13 22:59:02 2013 write UDPv4: No route to host (code=65) Wed Mar 13 22:59:02 2013 write UDPv4: No route to host (code=65) Wed Mar 13 22:59:02 2013 write UDPv4: No route to host (code=65) ... The routing table after a connection WITHOUT the push redirect-gateway (all traffic is not redirected to the VPN and everything is working fine, I can ping or ssh the OpenVPN server and access all other Internet resources through my default gateway): Destination Gateway Flags Refs Use Netif Expire default user148-1.wireless UGSc 50 0 en1 10.8/24 10.8.0.5 UGSc 2 7 tun0 10.8.0.5 10.8.0.6 UH 3 2 tun0 127 localhost UCS 0 0 lo0 localhost localhost UH 6 6692 lo0 client.openvpn.net client.openvpn.net UH 3 18 lo0 142.1.148/22 link#5 UCS 2 0 en1 user148-1.wireless 0:90:b:27:10:71 UHLWIir 50 0 en1 76 user150-173.wirele localhost UHS 0 0 lo0 142.1.151.255 ff:ff:ff:ff:ff:ff UHLWbI 0 2 en1 169.254 link#5 UCS 1 0 en1 169.254.255.255 0:90:b:27:10:71 UHLSWi 0 0 en1 71 The routing table after a connection with the push redirect-gateway option enable as in the server.conf file above (all internet traffic should be redirected to the VPN tunnel, but nothing is working, I can't access any Internet ressources at all): Destination Gateway Flags Refs Use Netif Expire 0/1 10.8.0.5 UGSc 1 0 tun0 default user148-1.wireless UGSc 7 0 en1 10.8/24 10.8.0.5 UGSc 0 0 tun0 10.8.0.5 10.8.0.6 UHr 6 0 tun0 54.234.43.171/32 0.0.0.0 UGSc 1 0 en1 127 localhost UCS 0 0 lo0 localhost localhost UH 3 6698 lo0 client.openvpn.net client.openvpn.net UH 0 27 lo0 128.0/1 10.8.0.5 UGSc 2 0 tun0 142.1.148/22 link#5 UCS 1 0 en1 user148-1.wireless 0:90:b:27:10:71 UHLWIir 1 0 en1 833 user150-173.wirele localhost UHS 0 0 lo0 169.254 link#5 UCS 1 0 en1 169.254.255.255 0:90:b:27:10:71 UHLSW 0 0 en1

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  • What may the reason of slowness be (see details in message body)?

    - by Ivan
    I've got a really weird situation I'm beating to solve. A performance problem which looks really like an empty waiting sequence set in code (while it probably isn't so). I've got a pretty powerful dedicated server (10 GB RAM, eight Xeon cores, etc) running Ubuntu 10.04 with all the functionality services (except OpenVPN server used to provide secure access to clients) deployed in separate VirtualBox (vboxheadless) machines (one for the company e-mail server, one for web server and one for accounting/crm server (Firebird + proprietary app server working with Delphi-made clients)). CPU load (as "top" says) is almost always near zero. Host system RAM is close to 100% usage but not overloaded (as very little swapping gets used, and freed (by stopping one of VMs) memory doesn't get reused any quickly). Approximately 50% of guests RAM is used. iostat usually shows near zero %util. Network bandwidth seems to be underused. But the accounting/crm client (a Win32 Delphi application run on WinXP machines) software works hell-slow with this server (and works much better using an inside-LAN Windows server). I just can't imagine what can make it be slow if there are so plenty of CPU, RAM, HDD and bandwidth resources available on clients and on the server even in their hardest moments. Saying bandwidth is underused I not only know that clients and the server are connected to the Internet with a bigger channels than really used (which leaves the a chance they may have a bottleneck of a sort on the route between them), I've tested bandwidth between clients and the server by copying files among them.

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  • Extending partition on linux gparted but not more space in the vm

    - by Asken
    I have a vm test installation of a linux running a build server. Unfortunately I just pressed ok when adding the disk and ended up with an 8gb drive to play with. Well into the test the builds are consuming more and more space, of course. The vm drive was resized to 21gb and using gparted I expanded the drive partitions and that all worked fine but when I go back into the console and do df there's still only 8gb available. How can I claim the other 13gb I added? fdisk -l Disk /dev/sda: 21.0 GB, 20971520000 bytes 255 heads, 63 sectors/track, 2549 cylinders, total 40960000 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0006d284 Device Boot Start End Blocks Id System /dev/sda1 * 2048 499711 248832 83 Linux /dev/sda2 501758 40959999 20229121 5 Extended /dev/sda5 501760 40959999 20229120 8e Linux LVM vgdisplay --- Volume group --- VG Name ct System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 4 VG Access read/write VG Status resizable MAX LV 0 Cur LV 2 Open LV 2 Max PV 0 Cur PV 1 Act PV 1 VG Size 19.29 GiB PE Size 4.00 MiB Total PE 4938 Alloc PE / Size 1977 / 7.72 GiB Free PE / Size 2961 / 11.57 GiB VG UUID MwiMAz-52e1-iGVf-eL4f-P5lq-FvRA-L73Sl3 lvdisplay --- Logical volume --- LV Name /dev/ct/root VG Name ct LV UUID Rfk9fh-kqdM-q7t5-ml6i-EjE8-nMtU-usBF0m LV Write Access read/write LV Status available # open 1 LV Size 5.73 GiB Current LE 1466 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 252:0 --- Logical volume --- LV Name /dev/ct/swap_1 VG Name ct LV UUID BLFaa6-1f5T-4MM0-5goV-1aur-nzl9-sNLXIs LV Write Access read/write LV Status available # open 2 LV Size 2.00 GiB Current LE 511 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 252:1

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  • Oracle Excellence Award

    - by Hartmut Wiese
    CALL FOR NOMINATIONS 2014 Oracle Excellence Award: Sustainability Innovation Is your organization using an Oracle product to help with a sustainability initiative while reducing costs? Saving energy? Saving gas? Saving paper? For example, you may use Oracle’s Agile Product Lifecycle Management to design more eco-friendly products, Oracle Transportation Management to reduce fleet emissions, Oracle Exadata Database Machine to decrease power and cooling needs while increasing database performance, Oracle Business Intelligence to measure environmental impacts, or one of many other Oracle products. Your organization may be eligible for the 2014 Oracle Excellence Award: Sustainability Innovation. Submit a nomination form located here by Friday June 20 if your company is using any Oracle product to take an environmental lead as well as to reduce costs and improve business efficiencies by using green business practices. These awards will be presented during Oracle OpenWorld 2014 (September 28-October 2) in San Francisco.  Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 About the Award • Winners will be selected from the customer and/or partner nominations. Either a customer, their partner, or Oracle representative can submit the nomination form on behalf of the customer.• There is a nomination form here to discuss your use of Oracle products and how they have helped your sustainability efforts and reduced costs. • Winners will be selected based on the extent of the environmental impact they have had as well as the business efficiencies they have achieved through their combined use of Oracle products. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 Nomination Eligibility • Your company uses at least one component of Oracle products, whether it's the Oracle database, business applications, Fusion Middleware, or Sun servers/storage. • This solution should be in production or in active development. • Nomination deadline: Friday June 20, 2014. Benefits to Award Winners • Award presented to winners during Oracle OpenWorld by Jeff Henley, Oracle Chairman of the Board • Free Oracle OpenWorld registration pass for each winning customer • 2014 Oracle Excellence Award: Sustainability Innovation award logo for inclusion on your own website &/or press release • Possible placement in Oracle Profit Magazine &/or Oracle Magazine • ‘Enable the Eco-Enterprise’ podcast opportunity See last year's winners here Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 ______________________________________________________________________________________ Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Questions? Send an email to: [email protected] Follow Oracle’s Sustainability Solutions on Twitter, LinkedIn, YouTube, and the Sustainability Matters blog Web page with award details:  http://www.oracle.com/us/products/applications/green/call-for-nominations-185050.html  

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  • Why is my new PC so slow at startup?

    - by rumtscho
    Bought a new PC this weekend, and it works really good. Only I have one big problem: startup time. Its BIOS needs 62 sec to load, then from Grub start to pw entering screen it's another 26 sec. I think this is a lot, because my old PC needs 34 sec for BIOS and another 8 sec to pw screen. After I enter the pw, the desktop is usable with practically no delay on both. The new PC is a core i7-930, running a Lucid Lynx 64 bit from a Intel Postville SSD (no internal HDs). The old PC is a Pentium 4 celeron (forgot the clock speed) running a Lucid Lynx 32 bit from an ATA 100 hard drive. Neither PC is overclocked. The new one has boot sequence 1.DVD ROM, 2.SSD (connected over SATA in AHCI mode), 3. removable drive. The old one boots from 1. DVD ROM, 2. HDD, 3. Floppy. Neither has a second OS installed. The new one has less software installed than the old one (I think), but the boot time difference was noticeable even before I made any installs. As far as I know, just the SSD should be enough to make a noticeable difference in boot time. I thought that having a good mainboard on the new PC as opposed to the basic office model on the old one would also mean a faster loading BIOS. If these assumptions are right, I guess I must have misconfigured something in the BIOS of the new PC. How should I configure it for a fast boot? It has an ASUS P6X58D board with an AMI BIOS, if you need the BIOS revision number I could post that too.

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  • How to perform this Windows 7 permissions change on many files via GUI or command line

    - by hippietrail
    After using my external hard drive on another Windows 7 computer to tweak photos with Windows Live Photo Gallery then upload them to Facebook I found the modified images were now not visible on the original Windows 7 computer. I'm not sure if the things I tried to get it working subsequently changed anything, but I do know this is the sequence of actions that makes the permissions of the modified files match those of the unmodified files: Right click on broken image file, select "Properties" On the "Security" tab press the "Advanced" button In the "Permissions" tab press the "Continue" button with the shield icon on it Tick the box marked "Include inheritable permissions from this object's parent Click the "Remove" button to remove the only current entry "Type: Allow, Name: Administrators (XYZ\Administrators), Permission: Full control, Inherited From: OK on the "Permissions" tab. OK on the "Security" tab. Now this same procedure does not work at the folder level. It results in "access denied" dialogs. I'm looking for some way to perform this exact modification on all the images I edited on the other computer. I'm happy to use the Windows GUI in Explorer or any other included tools. I'm happy to use the Windows command line. I'd prefer not to use a third-party tool since I'd have to be satisfied it's not doing anything else. I'm not looking for a different way to change permissions to other settings to make an external drive full of photos editable on multiple computers. At least not in this question.

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  • Software and/(x)or Hardware Projects for Pre-School Kids

    - by haylem
    I offered to participate at my kid's pre-school for various activities (yes, I'm crazy like that), and one of them is to help them discover extra-curricular (big word for a pre-school, but by lack of a better one... :)) hobbies, which may or may not relate to a professional activity. At first I thought that it wouldn't be really easy to have pre-schoolers relate to programming or the internal workings of a computer system in general (and I'm more used to teaching middle-school to university-level students), but then I thought there must be a way. So I'm trying to figure out ways to introduce very young kids (3yo) to computer systems in a fun and preferably educational way. Of course, I don't expect them to start smashing the stack for fun and profit right away (or at least not voluntarily, though I could use the occasion for some toddler tests...), but I'm confident there must be ways to get them interested in both: using the systems, becoming curious about understanding what they do, interacting with the systems to modify them. I guess this setting is not really relevant after all, it's pretty much the same as if you were aiming to achieve the same for your own kids at home. Ideas Considering we're talking 3yo pre-schoolers here, and that at this age some kids are already quite confident using a mouse (some even a keyboard, if not for typing, at least to press some buttons they've come to associate with actions) while others have not yet had any interaction with computers of any kind, it needs to be: rather basic, demonstrated and played with in less then 5 or 10 minutes, doable in in groups or alone, scalable and extendable in complexity to accommodate their varying abilities. The obvious options are: basic smallish games to play with, interactive systems like LOGO, Kojo, Squeak and clones (possibly even simpler than that), or thngs like Lego Systems. I guess it can be a thing to reflect on both at the software and the hardware levels: it could be done with a desktop or laptop machine, a tablet, a smartphone (or a crap-phone, for that matter, as long as you can modify it), or even get down to building something from scratch (Raspberry Pi and Arduino being popular options at the moment). I can probably be in the form of games, funny visualizations (which are pretty much games) w/ Prototype, virtual worlds to explore. I also thought on the moment (and I hope this won't offend anyone) that some approaches to teaching pets could work (reward systems, haptic feedback and such things could quickly point a kid in the right direction to understanding how things work, in a similar fashion - I'm not suggesting to shock the kids!). Hmm, Is There an Actual Question in There? What type of systems do you think might be a good fit, both in terms of hardware and software? Do you have seen such systems, or have anything in mind to work on? Are you aware of some research in this domain, with tangible results? Any input is welcome. It's not that I don't see options: there are tons, but I have a harder time pinpointing a more concrete and definite type of project/activity, so I figure some have valuable ideas or existing ones. Note: I am not advocating that every kid should learn to program, be interested in computer systems, or that all of them in a class would even care enough to follow such an introduction with more than a blank stare. I don't buy into the "everybody would benefit from learning to program" thing. Wouldn't hurt, but not necessary in any way. But if I can walk out of there with a few of them having smiled using the thing (or heck, cried because others took them away from them), that'd be good enough. Related Questions I've seen and that seem to complement what I'm looking for, but not exactly for the same age groups or with the same goals: Teaching Programming to Kids Recommendations for teaching kids math concepts & skills for programming?

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  • Is it possible to get ESC to behave as an actual escape key?

    - by leftaroundabout
    So I have finally switched, not so much because I'm yet convinced Emacs in itself is the better editor but because it certainly does have more powerful extensions. I am still using vim-mode though, perhaps that's part of my problem... but I really don't intend to abandon the modes-approach, so I'll probably stay with it. I'm getting along quite well, but one thing I find really unnerving is the behaviour of the esc key (which I have in the shift-lock position). I'm used to relying on this a lot as more or less a "panic key", which may not be nice but I find allows me to work generally quite a bit less caring about the keystrokes themselves, and thus faster. What I'd like this key to do is just get me out of any minibuffer or special editing mode into a well-defined normal state. Perhaps most importantly, I would like it to not do anything unrelated, Simulate meta. What do I have an alt key for? Close windows I'm not even in at the time. Getting interpreted as the final key in some key sequence. ... Is it possible to turn all that off and make esc an actual escape key? Vim-mode does make it behave kind of as I like in some situations, but when other plugins are involves this often breaks. Alternatively, are there different options that might suit my kind of workflow?

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  • SQL Server Replication Backup

    - by user18039
    Hi We have a new system that runs on SQL Server 2008 r2 64-bit. There is a primary on-line transactional processing (OLTP) database that accepts a high volume of updates from several thousand Point of Sale systems at stores around the country. In order to protect this vital function, I have decided to introduce a dedicated reporting database server - from which multiple users will run some pretty complex reports. I realise that there were a number of choices but I decided to use Transaction Replication as the mechanism for copying the data from the OLTP database to the new reporting database - one way replication. The solution has worked well in test. I'm now being asked what changes need to be made to the backup policy to cover the architectural changes. I have read pages such as MSDN:Strategies for Backing Up and Restoring Snapshot and Transactional Replication but I think these are overkill for my solution. In fact, my current thinking is that we simply need to continue making backups of the OLTP data and logs. If the Reporting db or any of the system replication (eg distribution) databases fail then it's no big deal - we can clear all down then re-create the replication. I realise that taking a complete snapshot of the OLTP would be time consuming (approx 5 hours) but I'd be more relaxed about this that trying to restore backups of the various data and log files in the correct sequence. My view is that the complex strategies set out in the MSDN article would only be the way to go for a more complex replication solution than I have, eg if there were multiple subscribers with 2-way replication. Would you agree? I'd be grateful for any advice. Many thanks, Rob.,

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  • Fake demostration software for command line

    - by Joe
    I'm looking for some software that would be useful for giving demonstrations. I regularly have to show the effects of scrips ect to classes while talking about their effects, and equaly regularly I have finger trouble and have to rewrite various commands - wasting class time and general energy. I'd like to be able to record a sequence of commands in advance, and then play them back at the speed of my choosing. So I might have a file that containes the commands: echo "hello world!" ls ls -l ls -l | sort I'd like to be able to play these commands back by typing similar ones in. So I'd have a blinking command prompt and if I typed 'echo "hxxx' the command prompt would read home$echo "hell and if I typed any other letters the terminal would fill up with the remainder of the command until I press enter, when it executes the command. The point is that even if I screw up the command when typing it, the command that I'd prepared in advance would be executed. My question is - does similar software exist for giving demonstrations? or even, is this an easy thing to script up...? EDIT - two quick things first of all I'm on osx - but it would be nice to get a general solution for other people who arrive here from google. and second a lot of the comments/answers are concentrating on, in effect, making it fast and easy to enter long commands by means of hotkeys and the like. Actually I'd like it to at least look like I'm typing live - that's why I put in the bit about the one-to-one keymapping, but I don't think I explained that quite as well as I could have...

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  • Almost All Logical Volumes Disappeared - Recovery?

    - by Alex
    We had a hard disc crash of one of two hard discs in a software raid with a LVM on top. The server is running Citrix xenserver. On the hard disk which is still intact, the volume group gets detected well, but only one LV is left. (some hashes replaced by "x") # lvdisplay --- Logical volume --- LV Name /dev/VG_XenStorage-x-x-x-x-408b91acdcae/MGT VG Name VG_XenStorage-x-x-x-x-408b91acdcae LV UUID x-x-x-x-x-x-vQmZ6C LV Write Access read/write LV Status available # open 0 LV Size 4.00 MiB Current LE 1 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:0 root@rescue ~ # vgdisplay --- Volume group --- VG Name VG_XenStorage-x-x-x-x-408b91acdcae System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 4 VG Access read/write VG Status resizable MAX LV 0 Cur LV 1 Open LV 0 Max PV 0 Cur PV 1 Act PV 1 VG Size 698.62 GiB PE Size 4.00 MiB Total PE 178848 Alloc PE / Size 1 / 4.00 MiB Free PE / Size 178847 / 698.62 GiB VG UUID x-x-x-x-x-x-53w0kL I could understand if a full physical volume is lost - but why only the logical volumes? Is there any explanation for this? Is there any way to recover the logical volumes? EDIT We are here in a rescue system. The problem is that the whole server does not boot (GRUB error 22) What we are trying to do is to access the root filesystem. But everything was in the LVM. We have only this: (parted) print Model: ATA SAMSUNG HD753LJ (scsi) Disk /dev/sdb: 750GB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 1 32.3kB 750GB 750GB primary boot, lvm And this 750GB LVM volume is exactly what we see on top.

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