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• how to type/send hex on a putty session

  - by Amit Phatarphekar

  I'm using Putty to make a serial connection to a device. I need to send a Hex string on this session. How do I do this? The Hex String is FF7E414244 This is required to break the serial device into command interface mode... From an XP machine, I can use HyperTerminal. And then on the serial connection, do a "send file", where the file has this hexstring entered using hex editing means. So this mechanism works. But now I have a windows 7 with no hyperterminal. so I'm using putty. But now how do I send the hex string? Thanks

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• Keyboard doesn't work after Windows resume from sleep (S3) -- how to fix?

  - by Marco Z

  I have a weird issue with my keyboard after resuming from S3 sleep: I can type perfectly for maybe 5 seconds, but afterwards the keyboard ceases to work until I hibernate or restart (or sleep again -- see below.) The rest of my system runs just fine -- just the keyboard apparently "freezes" up. Some closer observations: The keyboard will work for 5 seconds (and freeze again) every time I resume from sleep, even if it was frozen from a previous sleep The caps lock light will work fine within the 5 seconds. But after the keyboard "freezes", the light will remain on, but I'll be unable to turn it off. Perhaps this means power wasn't cut off from the keyboard, but it's just some software freezing up the port??? Given this info, would this indicate a problem with Windows itself? Drivers, maybe? Can I rule out the BIOS as the culprit? Finally, any ideas on how to fix? Thanks! Specs: Windows 7 x64 HP tx1000 laptop

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• Make BIND use DHCP DNS as backup

  - by cainmi

  I run BIND locally on my OS X machine, to enable wildcard Apache vhosts, which requires setting the DNS server for all network interfaces to 127.0.0.1. This works great, but means when I am on a network which uses an internal DNS server to route special (i.e. .companyname) URLs to a server on the network, the lookup fails. I tried adding both 127.0.0.1 and the DHCP provided DNS server, but this doesn't work either. Is there a way to make BIND use the DHCP DNS server for requests it cannot resolve locally?

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• Windows Server 2003 guest on Xen frequently stops responding

  - by smokris

  I'm running a Windows Server 2003 guest instance in Xen 3.x. This DomU runs fine for a day or two, then stops responding — I don't get any network response, and I can no longer connect to Xen's VNC console for this DomU. xm list shows this: Name ID Mem VCPUs State Time(s) Domain-0 0 6508 8 r----- 1161159.4 [A working Linux DomU] 1 512 1 -b---- 68711.1 [The hung Windows DomU] 5 512 1 ------ 67234.2 [Another working Linux DomU] 3 512 1 -b---- 163036.4 (What does the ------ mean? The xm manual explains what each of the six states mean, but not what no-state means.) If I xm destroy and then xm create the Windows DomU again, it boots right back up (with the Windows alert The previous system shutdown at [...] was unexpected.), and then stops responding after another day or two. I checked /var/log/xen/*.log, but no log messages are generated at the time the server stops responding. How should I proceed in troubleshooting this?

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• Reserve one http slot for /server-status?

  - by Stefan Lasiewski

  I have an Apache server which is hanging for some reason. When I normally want to check on the load of an Apache server, I tend to use mod_status via the URL at http://webserver1.example.org/server-status or from the commandline like service httpd fullstatus. However today, the Server is refusing all new connections. Some mysterious problem is causing connections to stall, which means that number of connections fills up all available connections (e.g. The number of connects exceeds the MaxClients setting), and therefore neither http://webserver1.example.org/server-status nor service httpd fullstatus can return anything. Is it possible to configure Apache to reserve one or two slots for the mod_status pages?

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• Install Trac Without Setting Up a VirtualHost in Apache?

  - by jobu1324

  I'm trying to set up Trac to test out it's functionality, and the only guides I can find online talk about setting up a VirtualHost. Right now I am under the impression that I need access to a DNS server to properly use the VirtualHost directive, and for various reasons I don't have access to one. Is it possible to set up Trac without setting up a VirtualHost? I haven't had any luck. If I run the site with tracd, it works - which means that at least part of it is set up properly. Right now all I have is an Apache Directory directive pointing to /pathToTracSite/htdocs/, and when I visit the trac location, all I get when viewing the site from a browser is an empty directory (which makes sense, because htdocs/ is empty). My server is running Apache2 I know I'm missing a lot here, because I don't understand Apache the Trac system very well - any help would be appreciated.

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• Is there a way to make 7zip temporarly uncompress the whole archive when double-clicking on an exe?

  - by Gnoupi

  In WinRAR, one feature which I like is the fact that you can set it to uncompress the whole archive in a temporary place, if you double-click on an .exe file inside the archive opened in WinRAR. Typically, I often download small games, which I just want to try, without the hassle of creating a folder for it, etc. Same for archives containing an installer with its own separate files. In the 7-zip window, if I double-click an exe, it will just extract the exe in a temporary location and launch it. In the small game context (or installer), it means that it will simply fail, because it will miss required files in the same folder. So my question is: Is there a way to make 7-zip extract the whole archive in a temporary folder when launching an exe from inside the archive?

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• Poppler installation

  - by Menopia

  I downloaded the new poppler 0.15 tar ball and i built it from source successfully but when trying dpkg -l | grep poppler it outputs ii libpoppler-dev 0.14.3-0ubuntu1.1 PDF rendering library -- development files ii libpoppler-glib-dev 0.14.3-0ubuntu1.1 PDF rendering library -- development files (GLib interface) ii libpoppler-glib4 0.12.4-1ubuntu1 PDF rendering library (GLib-based shared library) ii libpoppler-glib5 0.14.3-0ubuntu1.1 PDF rendering library (GLib-based shared library) ii libpoppler5 0.12.4-1ubuntu1 PDF rendering library rc libpoppler6 0.14.2.is.0.14.1-0ubuntu1 PDF rendering library ii libpoppler7 0.14.3-0ubuntu1.1 PDF rendering library ii poppler-utils 0.14.3-0ubuntu1.1 PDF utilitites (based on libpoppler) So AFAIK this means that the new version is not installed !!

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• What rights does an employer have to the employee's computer?

  - by Terrence Brannon

  What access rights should an employee grant an employer for a work computer? For instance, let's assume that the business people come to the IT lab late at night for discussions with the CIO and they use my computer for reading email and general web surfing. In a sense, this means that they are taking full or partial responsibility for any security issues that crop up that get traced back to the employee's machine. Perhaps the proper way to provide a computer to an employee is to give him full and exclusive use of it while employed. Only supervised access (such as hardware/software maintenance) should be acceptable.

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• What are some IT jobs where you don't sit at a desk for 8-10hrs a day?

  - by zippy

  Like a lot of people in IT I sit at a desk for 8-10hrs/day working on stuff that needs to get done "now". That usually means eating unhealthy lunches at my desk, and sometimes dinner too. This does terrible things to your health. I have been trying to work some exercise into the workday but I was thinking it would be great if I worked somewhere where I was exercising all the time (walking around, lifting servers, etc.). Does anyone have a job in IT (or know someone) where you are actually moving around (not sitting) doing something for most of the day?

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• Circumventing a manual HTML login page for "unclassified" websites

  - by auramo

  The IT department just made my life a little bit harder again: they introduced a manual HTML login page for all websites they have not "classified". This means that all the applications which try to access unclassified websites for e.g. downloading plugins do not work. Examples: Eclipse plugin installation, Maven builds etc. What would be the easiest workaround for this? The best I've come up with is try to extend/customize Ruby's httpproxy.rb that comes with Webrick. I would automate the manual login process whenever that login response page is detected. This sounds quite painful, and I think there might/should be simpler options?

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• Scanning php uploads in tmp directory with clamdscan fails

  - by Nikola

  I can't seem to get this thing to work, some permission problem maybe, but i can't even run clamdscan normally form console with root the result is always Permission denied. for example i create a file test.txt (eicar file) in /tmp and execute "clandscan /tmp/test.txt" in console logged in as root and i get "/tmp/test.txt: Access denied. ERROR ". The clamd demon is running with user clamav could that be the reason? Now i want to scan the same file (/tmp/test.txt) via php , so i run (i have chowned the file to apache:apache ) $cmd="clamdscan /tmp/test.txt"; exec($cmd,$a,$b); i get error 127 i try with the full path of the command /usr/bin/clamdscan i get error 126 (command is found but is not executable), this means that apache doesn't have the permission to execute /usr/bin/clamdscan ? what could be the problem?

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• virsh console and tty size

  - by pehrs

  I have a virtualization server to which I connect over ssh. If I now change the size of the window it will automatically propagate to the server. It's most easily seen using stty -a, checking the columns and row values. I then use virsh console to connect to the serial interface on a KVM based virtual machine. When I now change the size of the window it does not propagate to the virtual server. This is most easily seen by checking stty -a, which is not updated on the virtual machine when I change window size. This means that line breaks does not work correctly in the terminal and any application that relies on window size for formatting (emacs, man, etc) gets messed up unless the window size on the client matches the default size on the server. A workaround is to manually set the window size to match the client window using stty, but I wonder if there is any way to get this information to propagate and set the window size in the virtual machine automatically.

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• What does "every two minutes" mean in cron?

  - by Ambrose

  I've got two scripts in cron set to run every two minutes: */2 -- the thing is, they're out of step. One runs at 1,3,5,7,9 minutes, etc. and the other at 0,2,4,6,8. This is not a mission-critical problem, but means I've got two status reports, one a bit stale compared to the other. What does cron do exactly? Run the first one in crontab document order, waiting till it's finished to run the second one? Is there any way I can make the run at the same time, or as close as possible?

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• How do I launch a process as a specific user at startup on OS X?

  - by Scott Bonds

  I would like to run a script as a particular user on startup (not on login). I thought a launchd LaunchDaemon would do it, but 'man launchd' says: "If you wish your service to run as a certain user, in that user's environment, making it a launchd agent is the ONLY supported means of accomplishing this on Mac OS X. In other words, it is not sufficient to perform a setuid(2) to become a user in the truest sense on Mac OS X." They aren't kidding--when I try to run my script as a LaunchDaemon it doesn't work. In particular I'm trying to automate some keychain operations using the 'security' command, and it won't let me change the default keychain when I run the script through LaunchDaemon, though the script works fine when run using sudo from a shell. A LaunchAgent won't work, because the goal is for the proces to run without a user logging in and LaunchAgents only run when someone logs in. I looked at cron and the @reboot directive and that looks promising, but I read that cron is deprecated on OSX.

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• How do I determine which HD is involved in the Event Viewer?

  - by Rod

  My PC apparently crashed before I came home from work (so my daugthers tell me; they rebooted it). The first thing I did, after it came up, was got into the Event Viewer to see what it said. Several hours before they rebooted it, there's a message in the event viewer that says: The driver detected a controller error on \Device\Harddisk5\DR5 I've no idea what that means. I got into Computer Manager, to take a look at the disks on my machine. There's only 1 hard drive, and a few slots for microSD, etc, but none of them are labeled "Harddisk5", nor is there anything there labeled "DR5". How do I determine what, if anything, those are? Could they be USB drives that my daughters used?

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• How do I start silverlight on netflix in full screen automatically?

  - by KronoS

  I know that there this great big button that I can click for full screen on the bottom left of the screen. What I'm doing though is launching the direct movie/tv episode in chrome from XBMC using XBMCflicks. It's like pasting the video html address in the address bar and going directly to the video feed. Here's my dilemma, I want a fully working, no need for a keyboard/mouse HTPC, which means I don't want to have to click on the 'full screen' button. Is there a way to run chrome and silverlight automatically in full screen mode when launched?

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• Does changing web hosts (changing a domain's nameservers) affect the private nameservers / glue records created under that domain?

  - by Kris

  We currently have a virtual dedicated server with GoDaddy and have 4 domains under it. I ended up creating private nameservers under, say mydomain_a.com, and have ns1.mydomain_a.com and ns2.mydomain_a.com as the nameservers for the other 3 domains. Now, we're thinking of switching web hosts (not domain registrar just the host) which means I have to change mydomain_a.com's nameservers to the new host. Will that affect or mess with the other 3 domains still pointing to ns1.mydomain_a.com and ns2.mydomain_a.com? Will that affect the private nameservers / glue records in anyway? Currently: domain: mydomain_a.com nameservers (GoDaddy): ns1.mydomain_a.com ns2.mydomain_a.com domain: mydomain_b.com nameservers (GoDaddy): ns1.mydomain_a.com ns2.mydomain_a.com After the Change: domain: mydomain_a.com nameservers (Other Host): ns1.some_other_host_ns.com ns2.some_other_host_ns.com This is my Question, Would this be affected? domain: mydomain_b.com nameservers (GoDaddy): ns1.mydomain_a.com ns2.mydomain_a.com

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• How to defend agains botnet http requests

  - by Killercode

  I have a server with WHM + CPanel and 5 of my costumer got infected with zbot. This means that the domains they have are constantly receiving requests to certain destinations. I tried to use mod_security but seems that it can't filter every requests... I don't really know why? I still see in the access log the connection comming in and it's consuming a LOT of bandwidth and server load Those accounts have already been clean so all of those requests go to error 404 (the ones catched on mod_security I am dropping the connection). Is there anymore ways to defend against this requests?

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• how to have files created by CMS have the same ownership as SSH user

  - by Cam

  I am having difficulty on our ubuntu server whereby I have an SSH user that when I create files using this user the ownership is web_user:www-data The problem is when a file is uploaded or created using a content management system like joomla. When files are uploaded through Joomla - such as components / modules... The ownership is set to www-data:www-data This means that I need to then chown all new files to web_user:www-data so we can edit the files. Is there a way to set for a directory and sub-directories that all new files created have the ownership of web_user:www-data? Do I need to use something like setuid or setgid? Any help would be greatly appreciated.

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• how to have files created by CMS have the same ownership as SSH user

  - by Cam

  I am having difficulty on our ubuntu server whereby I have an SSH user that when I create files using this user the ownership is web_user:www-data The problem is when a file is uploaded or created using a content management system like joomla. When files are uploaded through Joomla - such as components / modules... The ownership is set to www-data:www-data This means that I need to then chown all new files to web_user:www-data so we can edit the files. Is there a way to set for a directory and sub-directories that all new files created have the ownership of web_user:www-data? Do I need to use something like setuid or setgid? Any help would be greatly appreciated.

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• Running a webserver behind a firewall, is it secure?

  - by i.am.intern

  Currently we have a Linux-based firewall which NAT-ing our public IP address to give internet access to our staff's PCs and a Windows Server 2003 for internal filesharing. I want to host Redmine/SVN (a bugtracker) internally behind this firewall using a Linux server. This webserver will be accessed by our clients externally so they can post bug reports. This means that I have to open port 80 & 22 at the firewall to give access to the webserver and me to SSH it from home. However, let's say I'm using password-based SSH for the webserver and somebody cracked it. Does that mean the cracker could ping and access other servers and PCs in the network?

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• tcpdump dns output codes

  - by tim

  Captured on the nameserver: 21:54:35.391126 IP resolver.7538 > server.domain: 57385% [1au] A? www.domain.de. (42) What das the percent sign in 57385% mean? As far as I can see 57385 is the clients sequence number, a plus would mean RD bit set. Second question: what does the ARCOUNT do in the query? As I understand the tcpdump man page the [1au] means tcpdump treats this as a protocol anomalie - as would I. I see this in a lot of queries.

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• some questions about raid card

  - by cpps

  I have some questions about raid card. Use LSI MegaRAID® SAS 9260-8i raid card as a example. There is only two connection ports on the raid card, and they provide two cables that can connect 8 SAS/SATA storages. The document say it can connect "Maximum 32 drives per controller", I want to know how can I connect more than 8 hard disks with this card. Is that they say "Eight internal SATA+SAS ports" means they provide two cables which can connect 8 hard drives, but you can use other way to connect Maximum 32 drives? The other question. I see host bus adapter has raid integrated , so what is the difference between host bus adapter and raid card. Are they the same? I also know is SAS/SATA Expander's function only to connect more hard drives? Thanks in advance.

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• Are some DSL modems cheaper to operate than others? (power usage question)

  - by SetJmp

  I recently have started using a Motorola 2210 in conjunction with AT&T's DSL service in the Silicon Valley area. That gadget runs hot to the touch! Which means... I assume it is gobbling lots of electricity even when I am not using it. Has anyone studied this subject in a rigorous way? Which leads to the question... if the 2210 is very energy inefficient are some DSL modem models cheaper to operate than others? -SetJmp

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