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• Error in Outlook: "A program has attachment...open" when replying to email

  - by Billious

  Whenever I reply to an email in Outlook 2007, dialogue box pops up saying: "A program has the attachment <email subject> open. Changes to this file will be lost unless you save your changes to another file by clicking the Microsoft Office Button in the other program, and then clicking Save As." This happens whether the original email has an attachment or not. It's just an annoyance really - Outlook works fine in every other respect. It only started happening about a week ago. As far as I can remember I haven't installed any new software that is likely to have affected it.

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• HP Jetdirect 175x and HP Officejet K7103 printsharing

  - by Richard

  I have managed to get this setup working , but it is very unreliable and either the printserver or the printer seem to crash and wont respond after 1 or 2 prints, although I am able to still access the web config of the 175x. I had a similar problem with a linksys wireless print server with the same problem and assumed that a HP print server would do the job better...grrrr!! Anybody any ideas what to do next? It is not possible to flash the printserver, nor the printer as far as I know, so I assume I have some iffy settings in the print server config somewhre. All our users are W7 or Vista BTW. Cheers Richard

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• Need some advice regarding collision detection with the sprite changing its width and height

  - by Frank Scott

  So I'm messing around with collision detection in my tile-based game and everything works fine and dandy using this method. However, now I am trying to implement sprite sheets so my character can have a walking and jumping animation. For one, I'd like to to be able to have each frame of variable size, I think. I want collision detection to be accurate and during a jumping animation the sprite's height will be shorter (because of the calves meeting the hamstrings). Again, this also works fine at the moment. I can get the character to animate properly each frame and cycle through animations. The problems arise when the width and height of the character change. Often times its position will be corrected by the collision detection system and the character will be rubber-banded to random parts of the map or even go outside the map bounds. For some reason with the linked collision detection algorithm, when the width or height of the sprite is changed on the fly, the entire algorithm breaks down. The solution I found so far is to have a single width and height of the sprite that remains constant, and only adjust the source rectangle for drawing. However, I'm not sure exactly what to set as the sprite's constant bounding box because it varies so much with the different animations. So now I'm not sure what to do. I'm toying with the idea of pixel-perfect collision detection but I'm not sure if it would really be worth it. Does anyone know how Braid does their collision detection? My game is also a 2D sidescroller and I was quite impressed with how it was handled in that game. Thanks for reading.

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• Error when starting update-manager

  - by Stefb1964

  Yesterday evening I ran an update. Apparently the python3-update-manager got updated. However, since today I get an error message when I started the update manager within Unity. A report was sent as proposed. Running an update from within the terminal seems to work normally. Uninstalling and re-installing from the ubuntu software centre didn't solve the problem. I tried throughout synaptic where I removed all related packages (3) and re-installed them after a restart..but in vain so far. I'm quite new to linux and ran out of ideas. Anybody? $ update-manager& [1] 7761 $ Traceback (most recent call last): File "/usr/bin/update-manager", line 37, in <module> from UpdateManager.UpdateManager import UpdateManager File "/usr/lib/python3/dist-packages/UpdateManager/UpdateManager.py", line 55, in <module> from .UpdatesAvailable import UpdatesAvailable File "/usr/lib/python3/dist-packages/UpdateManager/UpdatesAvailable.py", line 62, in <module> from DistUpgrade.DistUpgradeCache import NotEnoughFreeSpaceError EOFError: EOF read where not expected

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• raid md device is not remove from memory, how to overcome this problem

  - by santhosha

  i create raid 10 , i removed two arrays form md11 one by one , after that i going to editing the contents those are mounted ( it will be not responding stage), after i try for remove arrays those are left it is shows device or resource busy ( is not removed from memory). i try to terminate process this is also not work, i absorve from 4 days resync will be 8.0% it can not modifying. cat /proc/mdstat Personalities : [raid1] [raid0] [raid6] [raid5] [raid4] [linear] [raid10] md11 : active raid10 sde1[3] sdj14 286743936 blocks 64K chunks 2 near-copies [4/1] [___U] [1:2:3:0] [=...................] resync = 8.0% (23210368/286743936) finish=289392.6min speed=15K/sec mdadm -D /dev/md11 /dev/md11: Version : 00.90.03 Creation Time : Sun Jan 16 16:20:01 2011 Raid Level : raid10 Array Size : 286743936 (273.46 GiB 293.63 GB) Device Size : 143371968 (136.73 GiB 146.81 GB) Raid Devices : 4 Total Devices : 2 Preferred Minor : 11 Persistence : Superblock is persistent Update Time : Sun Jan 16 16:56:07 2011 State : active, degraded, resyncing Active Devices : 1 Working Devices : 1 Failed Devices : 1 Spare Devices : 0 Layout : near=2, far=1 Chunk Size : 64K Rebuild Status : 8% complete UUID : 5e124ea4:79a01181:dc4110d3:a48576ea Events : 0.23 Number Major Minor RaidDevice State 0 0 0 0 removed 1 0 0 1 removed 4 8 145 2 faulty spare rebuilding /dev/sdj1 3 8 65 3 active sync /dev/sde1 umount /dev/md11 umount: /dev/md11: not mounted mdadm -S /dev/md11 mdadm: fail to stop array /dev/md11: Device or resource busy lsof /dev/md11 COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME mount 2128 root 3r BLK 9,11 4058 /dev/md11 mount 5018 root 3r BLK 9,11 4058 /dev/md11 mdadm 27605 root 3r BLK 9,11 4058 /dev/md11 mount 30562 root 3r BLK 9,11 4058 /dev/md11 badblocks 30591 root 3r BLK 9,11 4058 /dev/md11 kill -9 2128 kill -9 5018 kill -9 27605 kill -9 30562 kill -3 30591 mdadm -S /dev/md11 mdadm: fail to stop array /dev/md11: Device or resource busy lsof /dev/md11 COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME mount 2128 root 3r BLK 9,11 4058 /dev/md11 mount 5018 root 3r BLK 9,11 4058 /dev/md11 mdadm 27605 root 3r BLK 9,11 4058 /dev/md11 mount 30562 root 3r BLK 9,11 4058 /dev/md11 badblocks 30591 root 3r BLK 9,11 4058 /dev/md11 cat /proc/mdstat Personalities : [raid1] [raid0] [raid6] [raid5] [raid4] [linear] [raid10] md11 : active raid10 sde1[3] sdj14 286743936 blocks 64K chunks 2 near-copies [4/1] [___U] [1:2:3:0] [=...................] resync = 8.0% (23210368/286743936) finish=289392.6min speed=15K/sec

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• dns service on OS X Snow Leopard Server

  - by Sorin Buturugeanu

  Hello all, I have a Mac Mini (1.83GHz, 1.5 RAM) with a fresh install of OS X Snow Leopard Server and I want to use it for DNS and web hosting. What I have done so far is to go to the domain registrar and configure a new nameserver (ns.domain.tld) to point to my static IP. This Mac Mini is behind a DI-524 router and I have forwarded ports 53 and 80 to the Mini. I have also added the domain name to the DNS configuration pannel (as in the attachment), but intodns.com gives the following error (among others, and obviously the site is not working): "Mismatched NS records WARNING: One or more of your nameservers did not return any of your NS records." I don't know where to go from here .. Thank you to anyone willing to take the time to give me a hint!! seems that I can't post images but here's the link: http://i.imgur.com/zWI7Y.png

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• DNSCurve vs DNSSEC

  - by Bill Gray

  Can someone informed, please give a lengthy reply about the differences and advantages/disadvantages of both approaches? I am not a DNS expert, not a programmer. I have a decent basic understanding of DNS, and enough knowledge to understand how things like the kaminsky bug work. From what I understand, DNSCurve has stronger encryption, is far simpler to setup, and an altogether better solution. DNSSEC is needlessly complicated and uses breakable encryption, however it provides end to end security, something DNSCurve does not. However, many of the articles I have read have seemed to indicate that end to end security is of little use or makes no difference. So which is true? Which is the better solution, or what are the disadvantages/advantages of each? edit: I would appreciate if someone could explain what is gained by encrypting the message contents, when the goal is authentication rather than confidentiality. The proof that keys are 1024bit RSA keys is here.

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• Reaver keeps reapeating the same PIN

  - by Umair Ayub

  I have been trying to Hack a WPA2 Wifi and so far I am stuck with it. Problem is that it keeps trying same pin over and over again. Here is the last REAVER command I entered. reaver -i mon0 -b 2C:AB:25:51:F1:CF -vv -c 1 -S -L -f It does this (only one PIN again and again) [+] Switching mon0 to channel 1 [+] Waiting for beacon from 2C:AB:25:51:F1:CF [+] Associated with 2C:AB:25:51:F1:CF (ESSID: PTCL-BB) [+] Trying pin 12345670 [+] Sending EAPOL START request [+] Received identity request [+] Sending identity response [!] WARNING: Receive timeout occurred [+] Sending WSC NACK [!] WPS transaction failed (code: 0x02), re-trying last pin [+] Trying pin 12345670 [+] Sending EAPOL START request [+] Received identity request [+] Sending identity response [+] Received identity request [+] Sending identity response ^C [+] Nothing done, nothing to save.

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• What does "error reading login count from pmvarrun" mean?

  - by n3rd

  I have the above mentioned error in my /var/log/auth.log file and just try to figure out if this is a harmelss statement. As far as I understand does pmvarrun tells the system how many active session (e.g. logins) a user has on the system. Full output of auth.log Jan 24 17:44:42 P835 lightdm: pam_unix(lightdm:session): session opened for user lightdm by (uid=0) Jan 24 17:44:42 P835 lightdm: pam_ck_connector(lightdm:session): nox11 mode, ignoring PAM_TTY :0 Jan 24 17:44:49 P835 lightdm: pam_succeed_if(lightdm:auth): requirement "user ingroup nopasswdlogin" not met by user "user" Jan 24 17:44:51 P835 dbus[1289]: [system] Rejected send message, 2 matched rules; type="method_call", sender=":1.31" (uid=104 pid=1882 comm="/usr/lib/indicator-datetime/indicator-datetime-ser") interface="org.freedesktop.DBus.Properties" member="GetAll" error name="(unset)" requested_reply="0" destination=":1.17" (uid=0 pid=1561 comm="/usr/sbin/console-kit-daemon --no-daemon ") Jan 24 17:45:04 P835 lightdm: pam_unix(lightdm:session): session closed for user lightdm Jan 24 17:45:04 P835 lightdm: pam_mount(pam_mount.c:691): received order to close things Jan 24 17:45:04 P835 lightdm: pam_mount(pam_mount.c:693): No volumes to umount Jan 24 17:45:04 P835 lightdm: command: 'pmvarrun' '-u' 'user' '-o' '-1' Jan 24 17:45:04 P835 lightdm: pam_mount(misc.c:38): set_myuid<pre>: (ruid/rgid=0/0, e=0/0) Jan 24 17:45:04 P835 lightdm: pam_mount(misc.c:38): set_myuid<post>: (ruid/rgid=0/0, e=0/0) Jan 24 17:45:04 P835 lightdm: pam_mount(pam_mount.c:438): error reading login count from pmvarrun Jan 24 17:45:04 P835 lightdm: pam_mount(pam_mount.c:728): pam_mount execution complete Jan 24 17:45:08 P835 lightdm: pam_unix(lightdm:session): session opened for user user by (uid=0) Jan 24 17:45:08 P835 lightdm: pam_ck_connector(lightdm:session): nox11 mode, ignoring PAM_TTY :0 Jan 24 17:45:25 P835 polkitd(authority=local): Registered Authentication Agent for unix-session:/org/freedesktop/ConsoleKit/Session2 (system bus name :1.54 [/usr/lib/policykit-1-gnome/polkit-gnome-authentication-agent-1], object path /org/gnome/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8) Jan 24 17:45:47 P835 dbus[1289]: [system] Rejected send message, 2 matched rules; type="method_call", sender=":1.59" (uid=1000 pid=4748 comm="/usr/lib/indicator-datetime/indicator-datetime-ser") interface="org.freedesktop.DBus.Properties" member="GetAll" error name="(unset)" requested_reply="0" destination=":1.17" (uid=0 pid=1561 comm="/usr/sbin/console-kit-daemon --no-daemon ") Thanks for any help

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• Reputable TabletPC vendors

  - by snorfys

  I'm developing software for tablet pcs and so far I've used some lenovo's (x41), some toshiba's (portege m200) and some gateways (M275). Granted: the machines we've gotten have predominantly been refurbs, but they're failing 80-90% of the time. Part of the reason that they're failing is users inevitably dropping them, so I'm looking at potentially some rugged tablet pcs. The problem that I'm running into is that Current tablet pcs are high spec (much higher than I'm looking for at least) The rugged tablet manufacturer space seems to be filled with lots of small companies that I don't trust yet. I'm looking for tablet PCs (keyboard or no) that can support: XP tpc (optional win 7) single core 1.5-2ghz 1gb ram wifi optional gsm optional gps very optional vehicle docking solutions The budget I've got is tight (but slightly flexible - So are there any reputable tablet pc vendors out there that can do this.

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• Recommended SpamAssassin update channels?

  - by Timo Geusch

  I'm currently using SpamAssassin on a couple of mail servers that I look after. SpamAssassin runs in the context of amavisd-new on those servers and with the usual bunch of plugins (FuzzyOCR, DCC, pyzor, razor). Currently the servers are getting their rule updates from the default SpamAssassin update channel (updates.spamassassin.org). Overall the setup seems to be reasonably effective but some types of spam seem to wander right through it even though I've made repeated attempts at training spamassassin. My guesstimate is that about 85%-90% of the spam that gets through policyd-weight makes it through the filters and it's been getting a lot worse recently as spammers are getting better at working their way through filters. Can someone recommend additional sources of filters to make SpamAssassin more effective? So far I've found OpenProtect's update channel but are there others worth looking at?

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• Benchmarking MySQL on win7

  - by Patrick

  I've setup a nginx server running php 5.3.6 and mysql 5.5.1.3. My computer is an AMD quadcore 9650, 4gb ram, 500gb 7200rpm HD. I ran the PHP MySQL Benchmark Tool v. 0.1, and got the following results: Testing a(n) MYISAM table using 100000 rows. Successfully created database speedtestdb Sucessfully created table speedtesttable Table Type Verified: MYISAM .. Done. 100000 inserts in 19.73628 seconds or 5067 inserts per second. Done. 100000 row reads in 0.2801 seconds or 357015 row reads per second. Done. 100000 updates in 4.03876 seconds or 24760 updates per second. I'm wondering where this stands as far as performance goes, and what are some steps I can take if any to improve on this. I'm not trying to make anything fantastic, just getting a feel for how to best optimize a web server in this configuration.

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• Texture switching with a entity system

  - by GameDev-er

  I'm using thinking of using an entity system in my game. So far I've been using Artemis with success. However, I have a question about texture switching. I read that switching textures too often is bad. So I load all the textures when the game loads like so: import org.newdawn.slick.opengl.TextureLoader; ... public HashMap<String, Texture> Textures; ... Then for each texture I do this: Texture tex = TextureLoader.getTexture("PNG", this.getClass().getResourceAsStream(texturePath)); Textures.put(textureName, tex); Then when drawing entities I do this: drawEntity() { glBindTexture(GL_TEXTURE_2D, Textures.get(entityTexture).getTextureID()); ... } Say I have 50 entities, using 10 different 3D models, each with their own texture. When the drawEntity system runs, it doesn't group by which entities use which texture. So I could be switching textures before drawing each entity! Is there a more efficient way to switch textures between entities? Or is glBindTexture() a good option?

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• How would i down-sample a .wav file then reconstruct it using nyquist? - in matlab [closed]

  - by martin

  This is all done in MatLab 2010 My objective is to show the results of: undersampling, nyquist rate/ oversampling First i need to downsample the .wav file to get an incomplete/ or impartial data stream that i can then reconstuct. Heres the flow chart of what im going to be doing So the flow is analog signal - sampling analog filter - ADC - resample down - resample up - DAC - reconstruction analog filter what needs to be achieved: F= Frequency F(Hz=1/s) E.x. 100Hz = 1000 (Cyc/sec) F(s)= 1/(2f) Example problem: 1000 hz = Highest frequency 1/2(1000hz) = 1/2000 = 5x10(-3) sec/cyc or a sampling rate of 5ms This is my first signal processing project using matlab. what i have so far. % Fs = frequency sampled (44100hz or the sampling frequency of a cd) [test,fs]=wavread('test.wav'); % loads the .wav file left=test(:,1); % Plot of the .wav signal time vs. strength time=(1/44100)*length(left); t=linspace(0,time,length(left)); plot(t,left) xlabel('time (sec)'); ylabel('relative signal strength') **%this is were i would need to sample it at the different frequecys (both above and below and at) nyquist frequency.*I think.*** soundsc(left,fs) % shows the resaultant audio file , which is the same as original ( only at or above nyquist frequency however) Can anyone tell me how to make it better, and how to do the various sampling at different frequencies?

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• Project Euler 51: Ruby

  - by Ben Griswold

  In my attempt to learn Ruby out in the open, here’s my solution for Project Euler Problem 51.  I know I started back up with Python this week, but I have three more Ruby solutions in the hopper and I wanted to share. For the record, Project Euler 51 was the second hardest Euler problem for me thus far. Yeah. As always, any feedback is welcome. # Euler 51 # http://projecteuler.net/index.php?section=problems&id=51 # By replacing the 1st digit of *3, it turns out that six # of the nine possible values: 13, 23, 43, 53, 73, and 83, # are all prime. # # By replacing the 3rd and 4th digits of 56**3 with the # same digit, this 5-digit number is the first example # having seven primes among the ten generated numbers, # yielding the family: 56003, 56113, 56333, 56443, # 56663, 56773, and 56993. Consequently 56003, being the # first member of this family, is the smallest prime with # this property. # # Find the smallest prime which, by replacing part of the # number (not necessarily adjacent digits) with the same # digit, is part of an eight prime value family. timer_start = Time.now require 'mathn' def eight_prime_family(prime) 0.upto(9) do |repeating_number| # Assume mask of 3 or more repeating numbers if prime.count(repeating_number.to_s) >= 3 ctr = 1 (repeating_number + 1).upto(9) do |replacement_number| family_candidate = prime.gsub(repeating_number.to_s, replacement_number.to_s) ctr += 1 if (family_candidate.to_i).prime? end return true if ctr >= 8 end end false end # Wanted to loop through primes using Prime.each # but it took too long to get to the starting value. n = 9999 while n += 2 next if !n.prime? break if eight_prime_family(n.to_s) end puts n puts "Elapsed Time: #{(Time.now - timer_start)*1000} milliseconds"

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• Jetty - Virtualhosting - SSL Certificates

  - by Walter White

  Hi all, I want to have different SSL certificates for different domains that I am hosting in a single Jetty instance. I do not want to front my Jetty application server with Apache. I am running Jetty 6.1.22. So far, I have only seen configurations with a single SSL certificate, and the configuration for SSL happens within server which leads me to believe that Jetty was designed to support a single SSL certificate. Please let me know if I can use Jetty with more than 1 certificate. I am considering migrating to JBoss Application Server 6.0 since it is closer to a real application server. Is this something that can be done there, and is it a supported feature? Walter

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• Should we enforce code style in our large codebase?

  - by eighttrackmind

  By "code style" I mean 2 things: Style, eg. // bad if(foo){ ... } // good if (foo) { ... } Conventions and idiomaticity, where two ways of writing the same thing are functionally equivalent, but one is more idiomatic. eg. // bad if (fooLib.equals(a, b)) { ... } // good if (a == b) { ... } I think it makes sense to use an auto-formatter to enforce #1 automatically. So my question is specifically about #2. I like to break things down into pros and cons, here's what I've come up with so far: Pros: Used by many large codebases (eg. Google, jQuery) Helps make it a bit easier to work on new areas of the codebase Helps make code more portable (this is not necessarily true) Code style is automatic once you get used to it Makes it easier to fast-decline pull requests Cons: Takes engineers’ and code reviewers’ time away from more important things (like developing features) Code should ideally be rewritten every 2-3 years anyway, so it’s more important to focus on getting the architecture right, and achieving high test coverage Adds strain to code reviews (eg. “don’t do it this way, I like this other way better”) Even if I’ve been using a code style for a while, I still sometime have to pause and think about how to write a line better Having an enforced, uniform code style makes it hard to experiment with potentially better styles Maintaining a style guide takes a lot of incremental effort Engineers rarely read through the style guide. More often, it's cited in code reviews And as a secondary question: we also have many smaller repositories - should the same code style be enforced there?

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• sudo: apache restarting a service on CentOS

  - by WaveyDavey

  I need my web app to restart the dansguardian service (on CentOS) so it needs to run '/sbin/service dansguardian restart' I have a shellscript in /home/topological called apacherestart.sh which does the following: #!/bin/sh id=`id` /sbin/service dansguardian restart r=$? return $r This runs ok (logger statement in script for testing output to syslog, so I know it's running) To make it run, I put this in /etc/sudoers: User_Alias APACHE=www # Cmnd alias specification Cmnd_Alias HTTPRESTART=/home/topological/apacherestart.sh,/sbin/e-smith/db,/etc/rc7.d/S91dansguardian # Defaults specification # User privilege specification root ALL=(ALL) ALL APACHE ALL=(ALL) NOPASSWD: HTTPRESTART So far so good. But the service does not restart. To test this I created a user david, and fudged the uid/gid in /etc/passwd to be the same as www: www:x:102:102:e-smith web server:/home/e-smith:/bin/false david:x:102:102:David:/home/e-smith/files/users/david:/bin/bash then logged in as david and tried to run the apacherestart.sh. The problem I get is: /etc/rc7.d/S91dansguardian: line 51: /sbin/e-smith/db: Permission denied even though S91dansguardian and db are in the sudoers command list. Any ideas?

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• .htaccess - Remove all cookies

  - by BlaM

  I want to make an existing domain a "CDN" domain that serves all images, CSS and JS files (i.e. static files). However that domain was parked earlier and some application on that domain has set cookies. As far as I can observe, I'd say that with cookies the "Expires" header doesn't seem to have much effect with some browsers (Including Firefox). The browsers still request the file, even if they shouldn't do so for the next month. It would be possible to do some mod_rewrite tricks to detect if there are any cookies and then call a PHP file to remove the cookies and serve the static file so that for the next call there aren't any cookies left, but maybe you can give me a simpler method: Is there a "Apache .htaccess only" way of removing all existing cookies?

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• Plex won't enter my home directory or other partitions

  - by RobinJ

  I just installed the Plex media server from the Ubuntu Software Center, and opened the web interface. I wanted to start by adding a collection. When it gave me a file browser, I wanted to go to /home/robin/Videos. /home is as far as I got. It showed robin, with an arrow in front of it, but when I tried to expand the directory tree it was empty. The same happened when trying to access /media/Data. For me it's quite useless like this, as all of my media files are inside those 2 directories. Help would be much appreciated. My first guess seemed to be a correct one; It is, as always, a permissions problem. How do I give plex access to my home folder without also giving other users access to it? My home folder is encrypted by the way, so that'll probably complicate things a little. robin@RobinJ:~$ sudo -u plex bash [sudo] password for robin: bash: /home/robin/.bashrc: Permission denied plex@RobinJ:~$ ls -al ls: cannot open directory .: Permission denied plex@RobinJ:~$ cd /home plex@RobinJ:/home$ cd robin bash: cd: robin: Permission denied plex@RobinJ:/home$ ls -al robin ls: cannot open directory robin: Permission denied

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• Notepad and Textedit exchange

  - by Peter

  I use both W7 and Mac OSX on several machines, with sugarsync to sync files and directories. So far no problem. However txt files created by W7 Notepad are displayed differently with Mac TextEdit. And when I edit the file with TextEdit, it looks different again in W7 Notepad. Edits in Notepad again look different on the Mac. Problem areas are: - tabs - carriage returns - fonts. I use and edit one particular txt file on a daily basis: services.txt (here I keep all my web accounts etc). What can I do to keep these exactly the same whilst editing on either Mac or W7? thanks Peter

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• FTP ASCII file from Windows to Mainframe (iSeries) — special characters

  - by MikeM

  I have a text file created on a Windows machine, the page coding used on the file is 1252 This file is then ftp'd to an iSeries machine for processing As far as I can see, it appears on the iSeries. It has a CCSID of 037. Sometimes this file contains French characters (e.g. é). When this happens, the FTP will fail with a truncation error as the french character gets converted to some extra junk: �. The file is fixed block so the line does get truncated due to the one character turning into 3. I can convert the French characters to characters without the accents before sending but would prefer to keep everything intact. So is there a way to retain them and send the file over properly? I'm very green on iSeries, mainly a Windows guy.

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• How to gain accurate results with Painter's algorithm?

  - by pimvdb

  A while ago I asked how to determine when a face is overlapping another. The advice was to use a Z-buffer. However, I cannot use a Z-buffer in my current project and hence I would like to use the Painter's algorithm. I have no good clue as to when a surface is behind or in front of another, though. I've tried numerous methods but they all fail in edge cases, or they fail even in general cases. This is a list of sorting methods I've tried so far: Distance to midpoint of each face Average distance to each vertex of each face Average z value of each vertex Higest z value of vertices of each face and draw those first Lowest z value of vertices of each face and draw those last The problem is that a face might have a closer distance but is still further away. All these methods seem unreliable. Edit: For example, in the following image the surface with the blue point as midpoint is painted over the surface with the red point as midpoint, because the blue point is closer. However, this is because the surface of the red point is larger and the midpoint is further away. The surface with the red point should be painted over the blue one, because it is closer, whilst the midpoint distance says the opposite. What exactly is used in the Painter's algorithm to determine the order in which objects should be drawn?

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• AWS RDS connection count

  - by wmarbut

  I am using AWS RDS with MySQL for a project and have a "large" instance. The documentation is clear on what this means as far as compute resources and RAM goes, but I can't find anything that documents how many open database connections that I can have. The app that I am using is PHP and it utilizes PDO with persistent connections. This means that the number of open connections could reach the maximum number of PHP child processes running at any given point. How do I ensure that my RDS instance has a max connections setting high enough to be comfortable with this?

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• LDAP Structure: dc=example,dc=com vs o=Example

  - by PAS

  I am relatively new to LDAP, and have seen two types of examples of how to set up your structure. One method is to have the base being: dc=example,dc=com while other examples have the base being o=Example. Continuing along, you can have a group looking like: dn: cn=team,ou=Group,dc=example,dc=com cn: team objectClass: posixGroup memberUid: user1 memberUid: user2 ... or using the "O" style: dn: cn=team, o=Example objectClass: posixGroup memberUid: user1 memberUid: user2 My questions are: Are there any best practices that dictate using one method over the other? Is it just a matter of preference which style you use? Are there any advantages to using one over the other? Is one method the old style, and one the new-and-improved version? So far, I have gone with the dc=example,dc=com style. Any advice the community could give on the matter would be greatly appreciated.

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