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• Mac OS X - configuring ntpd server with on LAN with D-Link DIR-655

  - by Mark C

  Hey all, This question is pretty specific, but I hope someone will have seen this error elsewhere. I a configuring a machine running OS X 10.5.8 to be an NTP server for machines connected to a LAN that is not connected to the Internet. I am not too worried about knowing the "right" time on all the machines, but rather worried about making sure everyone has the same notion of time. I configured the NTP daemon on Mac by turning on the Set date and time automatically in System Preferences, using the server's clock, 127.127.1.0 as the reference clock. I figured I should see if the server can NTP query itself before proceeding to the clients. The weird part is when I run the ntpq -p command in a command-prompt when connected to my D-Link DIR-655 (firmware: 1.33), it hangs for about a minute or so each time before finally giving me some output. I thought the problem might have to do with Port Forwarding, so I configured the router to forward port 123 for the IP of the server, but that did not improve the situation. When I run the ntpq -p command on my school's network, on a Linksys WRT54G router, or with the wireless Airport card turned off - I have absolutely no problems - the command returns a response instantly. Is this normal? I can see why a query might take a minute or so, but I don't understand why one router does it faster than the other. I tried messing around with the ntp.conf file adding the burst, minpoll, and maxpoll options: server 127.127.1.0 burst minpoll 4 maxpoll 5 Figuring that perhaps I am polling too often and the configuration file is slowing me down, but even with this, the ntpq still hangs on the D-Link DIR-655, but does just fine on the other routers. Any thoughts on where the lag is coming from or if the lag is even a problem?

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• Excel Help: Data Input Help

  - by B-Ballerl

  Everyday I download data from a site that will have rows each filled with individual data for clients. I'm able to input the data into excel as a whole but after that I'm having trouble figuring out how to put it into a chart. For example Web visits time. So say Client 1 stayed for 5 min increasing his total time on the site to 20 min and Client 2 stayed for 0 min keeping his time of 10 min and they were both registered on new years eve, and R1's last login was today and R2's was yesterday. (R for some reason repersents Client, no idea why...). Client 3 hasn't been on since he registered keeping his total at 4 min So my data would look something like this for Today (20110104) R1,20101231,20110104,20 R2,20101231,20110103,10 R3,20101231,20101231,4 And this for the day before (201101030), R1,20101231,20110102,15 R2,20101231,20110103,10 R3,20101231,20101231,4 I get about 200+ client rows each day where even the names of the Client list are changing. Is it possible to import the data each day and fill it in a excel sheet where the Client number is off on the left hand side in a table, and the amount of time (Whole Number ex. 4) each day it spends on the site extend to the right under it's specific date see Picture? I've manage to create a manual sheet but have been unsucessful at getting excel to do any of it for me. Here are two pictures:

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• Suspected brute force attack

  - by HarveySaayman

  Recently I acquired a dedicated server from a local ISP to play around with. As the tags suggest, its a windows server 2008 R2 machine. I've only had it for a few days, and no real traffic is going to it yet. I haven't even deployed a "real" website to it yet. Just a silly page so that I could check IIS, my host headers, DNS records, etc are all configured correctly. While playing around, I noticed a ton of Audit Failure entries in the event viewers security logs. It seems something is trying to access the administrator account, and failing. It smells like a brute force attack to me. My ISP gave me the account details of the administrator account and I used those to RDP into the box, which I've heard is not the securest of situations. I created myself another account and added myself to the administrator group, so im using that account to gain acceess to the machine now. In response to all of this i used http://strongpasswordgenerator.com/ to generate me some 20 character length strong passwords and changed all of my account passwords, even the SQL sa user. I also enabled the auto ban feature of FileZillaServer (my FTP server) My questions: 1) how can i detect this kind of thing better? 2) how can i protect my server from unauthorized access better? PS: I'm a software dev, not a sysadmin so please mind my server security idiot-ness-ness

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• How do I restrict the Open/Save dialog in Windows to one folder?

  - by MindModel

  I spend a significant amount of time helping non-techies use their PC's. I realized most of that time is spent trying to explain to them how the Windows folder hierarchy works, where the "open file" dialog is pointing now, and how to find that Word document they saved. All this time, they're telling me they "just want to print the file". They refuse to learn how to read the PC screen, try to memorize a fixed set of steps, and end up calling me back to tell me their files disappeared again. I realize it's not productive to try to restrict where PC apps (e.g. Quicken) store files. But if there was a Windows utility I could turn on or off that would restrict the Open/Save dialogs in Windows apps, my noob user friends and I would save an enormous amount of time. The goal would be to have all files whose locations are chosen by the Save dialog saved to one folder, and have the Open dialog always point to that folder, until the utility is turned off. Does such a Windows utility exist?

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• How to move my data from my old MacBook Pro to my new one?

  - by Tim Büthe

  I just purchased a new MacBook Pro and already got an 2008 model. I wonder how I move all my data over to the new one. My first idea was, to use my Time Machine backup and restore from it, which seems to be a good idea and should work just fine regarding to this link: http://blog.duncandavidson.com/2008/01/restoring-from-time-machine.html. But, since my current MacBook got older Software on it, like iLife '08 instead of iLife '09 I would have to upgrade this afterwards. Is this correct, or does Time Machine does some magic to exclude well known software? And is it possible to reinstall or upgrade iLife with the included installation DVDs? My second idea is, to just swap the hard drives instead of using the Time machine backup. If it is not too complicated to remove the hdd, this should be the fastest way. This also has the benefit, that the 2008er MacBook then contains a brand new installation and I don't have to remove all my stuff or reinstall Mac OS before I give it away. My question on that second idea would be: does snow leopard handle this stuff correctly? I reboot with the new hardware and all just works fine? So in a nutshell: What would you do: restore from backup or swap drives? And what about the new software?

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• Multimaster Keepalived Configuration (Virtual IP with Load Balancing)

  - by Rad Akefirad

  Here are requirements: 1. High Availability 2. Load Balancing First configuration 1. Two linux servers have been configured with one static IP for each: 10.17.243.11, 10.17.243.12 2. Keepalived has been installed and configured with one VRRP instance to provide one virtual IP (10.17.243.10 as VIP, 10.17.243.11 as master and 10.17.243.12 as backup). 3. Everything works fine. The VIP is assigned to the master server (10.17.243.11) as long as it is up and running. As soon as it goes down, the VIP will be assigned to the backup server (10.17.243.12). 4. The problem here is all communication goes to the master server. Second configuration 1. I found active-active configuration for Keepalived which is possible by defining more than one VRRP instance. So that both server have two IPs (real 10.17.243.11 and virtual 10.17.243.10 for server #1 and real 10.17.243.12 and virtual 10.17.243.20 for server #2. 2. Everything works fine. we have two VIPs which are accessible (HA). But all communication coming to each IP still goes to one single machine (either server #1 or #2 depending on the IP). However I found some tricks on the DNS to overcome this limitation. But it's not acceptable in our case. Question: Is there any way to have one virtual IP which is assigned to both servers? By that I mean both servers are handling some part of workload (like the thing we do in web server load balancing)? By using either keepalived or some other tools? Thanks in advance.

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• Is iptable capable of this or should I go with mod_proxy?

  - by Jesper

  I'm trying to configure my network to receive an incoming connection on one device and then redirect it to another device on a specific port. Right now I'm on about port 80 and a device running apache. The problem I'm facing is that when the forwarding is done it also sets the source ip to the first device instead of the source ip the user that connects to the service has. Let me illustrate it: [Internet User] = 7.7.7.7 connects to [Device 1] = 1.1.1.1:80 [Device 1] forwards it to [Device 2] = 1.1.1.2:80 [Device 2] outputs response that [Internet User] sees So on [Device 2] I will naturally see [Device 1]s IP in the logs, but I wanna see if there is a way to connect the internet user through [Device 1] to [Device 2] while seeing the real source IP in the logs on [Device 2]. Is that possible? My rule-set looks like this at the moment: (on Device 1) iptables -P FORWARD ACCEPT iptables -t nat -I PREROUTING -j DNAT -p tcp --dport 80 --to-destination 1.1.1.2:80 iptables -t nat -I POSTROUTING -j SNAT -p tcp -d 1.1.1.2 --to-source 1.1.1.1 On [Device 2] it accepts all incoming on port 80 from [Device 1] as well as accepts all related and established connections. So, would there be any way to get the real source onto [Device 2]? Let me know if you need more information!

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• Event Log "Wake Source" when system wakes from sleep

  - by Doltknuckle

  So I've been troubleshooting sleep timers for our systems and have run across an interesting issue. I need a way to report how long a system was awake after a number of different inputs. Now, I've discovered that the System Log tracks wake and sleep events and even tells you the times that everything happens at. The thing is doesn't tell you is what triggered the wake event. It does give you a numerical code however. Here are some examples of what I am finding. Index : 2901 EntryType : Information InstanceId : 1 Message : The system has resumed from sleep. Sleep Time: 2010-10-01T23:20:06.097488100Z Wake Time: 2010-10-03T17:41:12.796400500Z Wake Source: 0 Category : (0) CategoryNumber : 0 Source : Microsoft-Windows-Power-Troubleshooter -- Index : 2841 EntryType : Information InstanceId : 1 Message : The system has resumed from sleep. Sleep Time: 2010-10-01T19:19:37.239789600Z Wake Time: 2010-10-01T21:28:48.921200800Z Wake Source: 4HID Keyboard Device Category : (0) CategoryNumber : 0 Source : Microsoft-Windows-Power-Troubleshooter So here's my question: Does anyone know what the different numerical codes for the "Wake Source" mean? I think "0" is a magic packet and "4" is a USB device. Does anyone have any idea if there is any documentation out there on this for Windows 7? Thanks in advance

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• prevalent, recurring hardrive failure intel macbook from 2006/2007

  - by SimonSalman

  Hi, Long story: My MacBook's hard drive failed one year ago, just a month after its warranty ended or: a year and a month after I bought it. After about ten phone calls to Apple's service, they agreed to extend the warranty for another year, so that I got it replaced free of charge. In the mean time, I got to know that many MacBook users that experience/report hard drive failures. Every reported crash was preceded by a slowdown of system performance, an increased occurrence of the spinning beach ball wait courser, and frequent crashes of applications that used to run very robust until then. It happened (as far as I know) with MacBooks from 2006/2007. All these MacBooks additionally suffer from a recurring wearing down of their "top case". Many heavy users had to replace their HDDs three time since 2006/2007 resulting in an head crash, making it impossible to recover data (diagnosis of recovery specialists) in most but not all cases HDD was Seagate (doesn't necessarily have to be the cause, if majority of the MacBook charge contained Seagate drives) And right now (one year after my first disk crash), these symptoms are cumulating on my system, again ... Short version: prevalent hard drive failure on MacBook charge from 2006/2007 (i.e. 2.16 GHz Intel Core 2 Due) I am looking for any (preferable open source) tool for checking the hard drive condition, especially to detect the known "MacBook problem". So, that I can replace the disk on time. If any Mac user found a solution to prevent the repeated failure of heir hard drive, I would be very glad to get to known it. I really enjoy my old MacBook, but I hate to get interrupted every year by an HDD crash. BTW, the issue is already in discussion for a long time, but there seems to be no solution, so far. Thanks, Simon

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• How to auto mark tape as free in DPM 2012?

  - by Massimo

  I have a backup server running System Center Data Protection Manager 2012, connected to a couple of tape drives (no library). I also have, of course, some tapes. Tape rotation is manual. The tape have been used before, by DPM itself (but the server has been completely rebuilt) and by other backup softwares; they are not emtpy. But they contain no data that DPM knows and/or wants to preserve, so they can be marked as free without having to run forcefreetape.ps1. When a tape is placed into the drive, it is required to perform an inventory, have it recognized as an imported tape and then mark it as free; otherwise DPM will simply refuse to use it. How can I tell DPM to automatically treat those imported tapes as free? And, of course, I do not want to reuse real backup tapes if by chance they get put into the drives before their expiration date, so the solution should mark imported tapes as free, but should not do the same with real, non-expired tapes.

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• Understanding RedHats recommended tuned profiles

  - by espenfjo

  We are going to roll out tuned (and numad) on ~1000 servers, the majority of them being VMware servers either on NetApp or 3Par storage. According to RedHats documentation we should choose the virtual-guestprofile. What it is doing can be seen here: tuned.conf We are changing the IO scheduler to NOOP as both VMware and the NetApp/3Par should do sufficient scheduling for us. However, after investigating a bit I am not sure why they are increasing vm.dirty_ratio and kernel.sched_min_granularity_ns. As far as I have understood increasing increasing vm.dirty_ratio to 40% will mean that for a server with 20GB ram, 8GB can be dirty at any given time unless vm.dirty_writeback_centisecsis hit first. And while flushing these 8GB all IO for the application will be blocked until the dirty pages are freed. Increasing the dirty_ratio would probably mean higher write performance at peaks as we now have a larger cache, but then again when the cache fills IO will be blocked for a considerably longer time (Several seconds). The other is why they are increasing the sched_min_granularity_ns. If I understand it correctly increasing this value will decrease the number of time slices per epoch(sched_latency_ns) meaning that running tasks will get more time to finish their work. I can understand this being a very good thing for applications with very few threads, but for eg. apache or other processes with a lot of threads would this not be counter-productive?

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• Postfix qmgr process causes heavy overload on mailservers

  - by Mattias

  We are using Postfix as MTA for our e-mailmarketing software and once in a while we see that the load on one of the mailservers rises above 5. The load is caused by the qmgr-process which is the heart of Postfix and I see that it is consuming a lot of CPU resources. The process seems to be stuck because after 15 minutes it is still doing the samething and still increasing the load. Once I restart the postfix service the load rapidly decreases to below 1 and Postfix continues to send e-mails without any problems. I'm wondering if anyone else has encountered this problem and if people have suggestions on how to prevent it. The problem shows up on all our mailservers but almost never at more than 1 at the time. It seems to be triggered only when we are sending a mailing but the size (10 or 100.000 e-mails doesn't seem to make a difference). It maybe happens once a week or even less often and the time and day is also different every time. We tried to solve the problem by decreasing the amount of messages qmgr is allowed to process but this didn't solve it. We are using Postfix 2.5.5 on Debian Lenny 5.0.8 (postfix is installed through the default Debian repository). No special messages can be found in the logs (syslog, messages, mail.*). Thank you for your time

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• Increse gap (pause) between songs

  - by holms

  Hello, I googled a lot before asking. This is really a problem. I know that there's an option in preference to switch off cross fading, but this is not what I want to do. Cross fading doesn't add any gap at all. If there's no gap between two songs, so you won't hear any. I need a real GAP between song, I mean a REAL pause about 2 seconds. Why? My MD player can't handle songs if there are no gaps in line input. Even with 1 second gap MD records 2 songs as 1. Is there any software that can increase the gap in the playlist? I know that Winamp has a plugin for putting pauses between songs. Is there anything for iTunes or Mac OS X? Another work around is to add a 2 sec MP3 between each song in the playlist but this is really killing me to do. I'm more on lossless stuff, so .CUE files would be an option too (using XLD for converting)

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• How to test nginx proxy timeouts

  - by mkorszun

  Target: I would like to test all Nginx proxy timeout parameters in very simple scenario. My first approach was to create really simple HTTP server and put some timeouts: Between listen and accept to test proxy_connect_timeout Between accept and read to test proxy_send_timeout Between read and send to test proxy_read_timeout Test: 1) Server code (python): import socket import os import time import threading def http_resp(conn): conn.send("HTTP/1.1 200 OK\r\n") conn.send("Content-Length: 0\r\n") conn.send("Content-Type: text/xml\r\n\r\n\r\n") def do(conn, addr): print 'Connected by', addr print 'Sleeping before reading data...' time.sleep(0) # Set to test proxy_send_timeout data = conn.recv(1024) print 'Sleeping before sending data...' time.sleep(0) # Set to test proxy_read_timeout http_resp(conn) print 'End of data stream, closing connection' conn.close() def main(): s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) s.bind(('', int(os.environ['PORT']))) s.listen(1) print 'Sleeping before accept...' time.sleep(130) # Set to test proxy_connect_timeout while 1: conn, addr = s.accept() t = threading.Thread(target=do, args=(conn, addr)) t.start() if __name__ == "__main__": main() 2) Nginx configuration: I have extended Nginx default configuration by setting explicitly proxy_connect_timeout and adding proxy_pass pointing to my local HTTP server: location / { proxy_pass http://localhost:8888; proxy_connect_timeout 200; } 3) Observation: proxy_connect_timeout - Even though setting it to 200s and sleeping only 130s between listen and accept Nginx returns 504 after ~60s which might be because of the default proxy_read_timeout value. I do not understand how proxy_read_timeout could affect connection at so early stage (before accept). I would expect 200 here. Please explain! proxy_send_timeout - I am not sure if my approach to test proxy_send_timeout is correct - i think i still do not understand this parameter correctly. After all, delay between accept and read does not force proxy_send_timeout. proxy_read_timeout - it seems to be pretty straightforward. Setting delay between read and write does the job. So I guess my assumptions are wrong and probably I do not understand proxy_connect and proxy_send timeouts properly. Can some explain them to me using above test if possible (or modifying if required).

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• Backup script to FTP with timed subfolders

  - by Frederik Nielsen

  I want to make a backup script, that makes a .tar.gz of a folder I define, say fx /root/tekkit/world This .tar.gz file should then be uploaded to a FTP server, named by the time it was uploaded, for example: 07-10-2012-13-00.tar.gz How should such backup script be written? I already figured out the .tar.gz part - just need the naming and the uploading to FTP. I know that FTP is not the most secure way to do it, but as it is non-sensitive data, and FTP is the only option I have, it will do. Edit: I ended up with this script: #!/bin/bash # have some path predefined for backup unless one is provided as first argument BACKUP_DIR="/root/tekkit/world/" TMP_DIR="/tmp/tekkitbackup/" FINISH_DIR="/tmp/tekkitfinished/" # construct name for our archive TIME=$(date +%d-%m-%Y-%H-%M) if [ $1 ]; then BACKUP_DIR="$1" fi echo "Backing up dir ... $BACKUP_DIR" mkdir $TMP_DIR cp -R $BACKUP_DIR $TMP_DIR cd $FINISH_DIR tar czvfp tekkit-$TIME.tar.gz -C $TMP_DIR . # create upload script for lftp cat <<EOF> lftp.upload.script open server user user password lcd $FINISH_DIR mput tekkit-$TIME.tar.gz exit EOF # start backup using lftp and script we created; if all went well print simple message and clean up lftp -f lftp.upload.script && ( echo Upload successfull ; rm lftp.upload.script )

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• open-source LAMP package for simple accouting and receiving?

  - by user26664

  Hello. I am involved with a computer-based charity where we take donation of old equipment, often recycle it, mostly rehabilitate it and make it available through grants and 'adoptions', and sell some items. What we're looking for is a LAMP package that can handle our records of donations of equipment, print receipts for donators, and also track our thrift store sales with receipts. Donators will want receipts of their donations for tax deduction purposes. We'll want to print reports of incoming items from time to time, say monthly and yearly. For the thrift store, we'll also need receipts for that, reports of cash, especially for reconciling cash drops, and also reports of items sold from time to time. I'm thinking this might be a single package, but it might be two. We don't want to track our shop inventory with either of these programs -- that's another program/project. We just need to know what was donated and what was sold. It must be open source, and ideally we'd like it to run on LAMP -- Linux, Apache, MySQL, PHP, but we will consider other open-source platforms.

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• Cache-control for permanent 301 redirects nginx

  - by gansbrest

  I was wondering if there is a way to control lifetime of the redirects in Nginx? We would liek to cache 301 redirects in CDN for specific amount of time, let say 20 minutes and the CDN is controlled by the standard caching headers. By default there is no Cache-control or Expires directives with the Nginx redirect. That could cause the redirect to be cached for a really long time. By having specific redirect lifetime the system could have a chance to correct itself, knowing that even "permanent" redirect change from time to time.. The other thing is that those redirects are included from the Server block, which according the nginx specification should be evaluated before locations. I tried to add add_header Cache-Control "max-age=1200, public"; to the bottom of the redirects file, but the problem is that Cache-control gets added twice - first comes let say from the backend script and the other one added by the add_header directive.. In Apache there is the environment variable trick to control headers for rewrites: RewriteRule /taxonomy/term/(\d+)/feed /taxonomy/term/$1 [R=301,E=expire:1] Header always set Cache-Control "store, max-age=1200" env=expire But I'm not sure how to accomplish this in Nginx.

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• Online computer not responding to pings

  - by mastercork889

  I was doing a bit of scanning on my network lately, knew all the hostnames to each computer connected. But whilst pinging one of them ping returned Request timed out.. This is strange as I know the computer is online and that the computer responds correctly to pinging on a different (enterprise) network. Is there something on the computer, my network, or my computer that is bugging with this? - That's just a sub-question, I don't expect this to be the main answer. The real question: Why does this happen? Why does pinging the IP4 address not work? EDIT : Pinging the Hostname used to default to the IP4 address, but now it defaults to the IP6 address. Why does this happen? But now that it pings using IP6, how come it all of a sudden works? > ping -6 THE_COMPUTER Pinging THE_COMPUTER [lengthy IP6 address] with 32 bytes of data: Reply from [lengthy IP6 address]: time=1ms Reply from [lengthy IP6 address]: time=1ms Reply from [lengthy IP6 address]: time=1ms Reply from [lengthy IP6 address]: time=1ms Ping stats: Sent = 4, Recieved = 4, Lost = 0 (0% loss) But when this is done using IP4 it doesn't work. So there are now two questions: How come IP6 works and not IP4? Why does IP4 not work?

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• How can I enable pid and ppid fields in psacct dump-acct?

  - by annavt

  I am currently using the psacct package on Centos to perform accounting on processes run by users. The info file1 suggests that it is possible to output pid and ppid depending on what information your operating system provides in it's struct acct. pid and ppid are listed in /usr/include/linux/acct.h on my system: struct acct_v3 { char ac_flag; /* Flags */ char ac_version; /* Always set to ACCT_VERSION */ __u16 ac_tty; /* Control Terminal */ __u32 ac_exitcode; /* Exitcode */ __u32 ac_uid; /* Real User ID */ __u32 ac_gid; /* Real Group ID */ __u32 ac_pid; /* Process ID */ __u32 ac_ppid; /* Parent Process ID */ ... But pid and ppid are not output when I run dump-acct: # dump-acct /var/account/pacct.1 | tail awk | 0.0| 0.0| 81.0| 0| 0|8792.0|Thu Nov 24 04:03:04 2011 tmpwatch | 0.0| 0.0| 1.0| 0| 0|3816.0|Thu Nov 24 04:03:04 2011 cups | 0.0| 0.0| 4.0| 0| 0|8728.0|Thu Nov 24 04:03:04 2011 awk | 0.0| 0.0| 4.0| 0| 0|8792.0|Thu Nov 24 04:03:04 2011 runlevel | 0.0| 0.0| 0.0| 0| 0|3804.0|Thu Nov 24 04:03:04 2011 chkconfig | 0.0| 0.0| 0.0| 0| 0|3840.0|Thu Nov 24 04:03:04 2011 inn-cron-expire | 0.0| 0.0| 0.0| 0| 0|8728.0|Thu Nov 24 04:03:04 2011 awk | 0.0| 0.0| 0.0| 0| 0|8792.0|Thu Nov 24 04:03:04 2011 gzip | 5.0| 0.0| 9.0| 0| 0|4044.0|Thu Nov 24 04:03:04 2011 accton | 0.0| 0.0| 1.0| 0| 0| 0.0|Thu Nov 24 04:03:04 2011 Is it likely that there is no support in my kernel for this feature or that my psacct version does not support this? How can I add pid and ppid to my accounting logs? CentOS release 5.6 Kernel 2.6.18-238.19.1.el5 psacct 6.3.2 Thanks in advance Anna

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• How to figure out what VirtualBox did?

  - by AndrejaKo

  I'm trying to boot a custom made-in-ASM OS on my recent laptop. The OS is intended to be installed on a floppy and during make creates a bootable floppy. Since I don't have a floppy drive, I installed it on a virtual floppy. After that I used WinToFlash's create bootable MS-DOS USB drive option to transfer the floppy image to an USB flash drive. Then I tried to boot my computer from it but got only a repeating broken string on screen. After all that I made a virtual hard disk image form the flash drive using this tutorial and tried to boot a virtual machine from it. First time I got same problem as on real computer. I then used the reset option and next time and every time after that OS booted correctly. My question is: How do I figure out what exactly happened to the virtual machine between first and second boot? UPDATE I just created a new VM with default settings for windows XP and it has the same problem that I have on a real computer. I was unable to reproduce the procedure which made the first VM work correctly.

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• Being a more attractive job candidate - Certs XOR Degree

  - by Zephyr Pellerin

  I'm currently working in an IT position, where I do helpdesk stuff, and predominantly security related issues/consulting (In the loosest sense of the term) In-House and for Service-Contract clients (as the only/acting CCSP [I guess I should say only person with Cisco experience] in my organization). I've professionally written Kernel Mode drivers for a gaming company. Among other things that I'm proud to put on a resume. I think of myself as very reasonably qualified as a System Administrator, With excellent Cisco experience, among other things I think would make a good addition to almost any IT staff in need of a new employee. However, Something has always tripped me up - Human Resources. Let me explain, I decided to skip the university route - I'm immensely glad that I did, The computer science graduates that I've met and work with rarely know much of anything about Computers (Until they gain some 'real' experience), Even when asked about Theoretical Computing fundamentals they can rattle something off about Turing Completeness but rarely do they understand the mathematical underpinnings. In short, I think instead of going to college, I'd rather pick up some real world experience. However, Apparently, Employers rarely think the same way. A quick perusal of jobs through the standard job search engine yields nothing short of a conspiracy to exclude anyone without 'A Bachelors Degree in Computer Science or Equivalent'. Interviews I've had in the past have almost always been entangled with - 1. My Age (Which I can't really change) and 2. Lack of Degree. Employers frequently disregard the CCNA/CCSP, The experience I've gained through internships, My extensive experience in x86 assembly and C, among so many other things I like to think are valuable to employers - In lieu of the fact that I don't have a piece of paper. So, AS AN EMPLOYER - Is it even worth working on my CCIE? Or should I pad my resume with certifications that are easier to acquire (Like CISSP, MSCE, Network+, etc.). Or should I ditch the whole idea and head back to get a Mathematics or CS degree?

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• Anyone know a good mind mapper that works with a scheduler?

  - by GLycan

  TL;DR: Mind mapping tasks to be processed into a schedule based on task metadata. I have all sorts of ideas about what to invest resources (mainly time) in, but when I actually have time to do something I useually end up browsing reddit for not knowing what do to, and the frequancy with which I forget deadlines scares me. I'd love to bring order and structure into my mind, and always know what to do next. So, I want a mind mapping app, where I'd give each branch (types and subtypes of things I want to do) a importance score (if there were two branches, and one had 60 while the other 40, they would respectivily get 60% and 40% of the parent's importance, with the root being 100) and a how soon that branch should be revised/updated (an hobby I want to try out might be checked, say, once a week, while a school subject should be checked once a day) and give each leaf (something I want/need to do) how much time it takes, deadline (if any), and optionally an absolute importance, reoccurrence (guitar practice might repeat once a week), and prerequisites (reading something requires that book (although that could be brought somewhere), coding requires a box, jogging requires being outside) and maybe some other flags, like if it's enjoyable or not. It should either be packaged or working with a schedular app, to which I'd say, look, my day works this way (completely busy from 8 to 9:15, then 15 minutes of being inside with nothing, ..., two hours with box and possibility to go outside, etc), saying that such-and-such pattern is school and happens ever weekday except such-and-such days. The output should be of the form of a schedule, fit for printing or, when I finally get an android, mobile viewing, that schedules tasks with regards to availability of resources and importance (importance being derived from the leaf-task's parent branches), and the set of flags (all work and no play makes me a dull boy). One of these tasks should be reviewing anything that should be updated on that day, including future day layouts (e.g, if the time slots of future days have changed. This should be done every day.) Does anyone know some collection of preferably open-source (or free, or pirateable) tools, or better yet a single one, that accomplishes this task? I know python pretty well, and should be able to write any necessary glue.

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• Nginx > Varnish > Gunicorn Error Too many Redirections

  - by kollo

  I have the following config: Nginx Varnish Gunicorn Django I want to cache 2 versions of same site (mobile & web) with Varnish. Gunicorn : WEB: gunicorn_django --bind 127.0.0.1:8181 MOBILE: gunicorn_django --bind 127.0.0.1:8182 Nginx: WEB: server { listen 80; server_name www.mysite.com; location / { proxy_pass http://127.0.0.1:8282; # pass to Varnish proxy_set_header X-Real-IP $remote_addr; proxy_set_header Host $host; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; } } MOBILE: server { listen 80; server_name m.mysite.com; location / { proxy_pass http://127.0.0.1:8282; # pass to Varnish proxy_set_header X-Real-IP $remote_addr; proxy_set_header Host $host; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; } } Varnish: default.vcl backend mobile_mysite { .host = "127.0.0.1"; .port = "8182"; } backend mysite { .host = "127.0.0.1"; .port = "8181"; } sub vcl_recv { if (req.http.host ~ "(?i)^(m.)?mysite.com$") { set req.http.host = "m.mysite.com"; set req.backend = mobile_mysite; }elsif (req.http.host ~ "(?i)^(www.)?mysite.com$") { set req.http.host = "mysite.com"; set req.backend = mysite; } if (req.url ~ ".*/static") { /* do not cache static content */ return (pass); } } The problem: On Nginx if I setup Mobile version with Varnish (port 8282) and let WEB version with Gunicorn( port 8181), MOBILE is cached by varnish, both WEB & MOBILE works but WEB is not cached. If I set the proxy_pass of WEB version to Varnish (port 8282) and restart Nginx I got an error when accessing web version (www.mysite.com) "Too many redirections" . I Think my problem come from the Varnish config file, as the site works well if I setup Nginx proxy_pass to Gunicorn ports (MOBILE & WEB).

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• Is VGA port hot-pluggable?

  - by Martin Bøgelund

  In meetings, I often see people detaching the VGA connector from one running laptop and connecting it to another, while the projector is still on. Is this 100% risk free, and OK by design of the VGA standard? If there's a risk involved in hot-plugging VGA, can it be removed by turning off or suspending either laptop, display, or both? I see this being done all the time without causing disaster, so clearly I'm not interested in answers stating "we do it all the time, so it should be OK!". I want to know if there's a risk - real or in theory - that something breaks when doing this. EDIT: I did an internet search on the topic, and I never found a clear statement as to why it is safe or unsafe to hot swap VGA devices. The typical form is a forum question asking basically the same question as I did, and the following types of statements Yes it's hot swappable! I do it all the time! It involves some kind of risk, so don't do it! You're some kind of moron if you think there's a risk, so just do it! But no explanation as to why it safe or not... Joe Taylors answer below contains a link to a forum post and answers that basically give me the same statements as mentioned above. But again, no good explanation why. So I looked for an actual manual for a projector, and found "Lenovo C500 Projector User’s Guide". It states on page 3-1: Connecting devices Computers and video devices can be connected to the projector at the same time. Check the user’s manual of the connecting device to confirm that it has the appropriate output connector. [image] Attention: As a safety precaution, disconnect all power to the projector and devices before making connections. But again, no good explanation.

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• MicroSD card getting corrupted for no good reason

  - by ChaosR

  I recently bought an MicroSD card online. It's a Sandisk 16GB class 2. However, it has a nasty problem. Every time I fill it with my data, the fat tables get corrupted. I've tried reformatting it, blanking it, doesn't seem to solve the problem. I have tried windows and linux (ubuntu), both have the problem. I've used my usb microsd readers, and even tried putting it in my phone and putting data on it from there. All have this problem. Now the really odd thing is, besides the corrupted file tables, no programs can find anything wrong with the hardware. I've tried both chkdisk and "badblocks -w", neither give any type of error. Now I don't know if the actual data gets corrupted, or if its just filesystem tables. What happens is that one or more folders start showing a load of chinese-charred (random UTF8 symbols I suppose) folders and files, and it is impossible to do anything with those. All the other data (outside of the corrupted folders) seems fine. I've tried to test it, and the problem doesn't seem to show up until I fill the disk upto about 3~4GB. After that I can still access the data. But as soon as I eject/safely remove/unmount it, the bad things happen somehow. Next time I plug it in, the folders I most recently wrote to (but sometimes also the folders I wrote the time before last time to) are all gibberish. Does anybody have any clue what might be going on here? EDIT: It seems I can't even put ext3 or ext4 on it, they both complain about a corrupted journal. Gheh, guess something is really broken here.

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