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• On linux, what does it mean when a directory has size 0 instead of 4096?

  - by kdt

  Here's a strange thing I haven't seen before -- a directory whose size is reported by ls as 0 instead of 4096, and I can't create any files within it. # ls -ld lib home drwxr-xr-x. 2 root root 0 Feb 7 03:10 home <-- it has zero size dr-xr-xr-x. 11 root root 4096 Feb 4 09:28 lib # touch home/foo touch: cannot touch `home/foo': No such file or directory <-- and I can't create files in it # rm home rm: cannot remove `home': Is a directory <-- look, it really is a dir So what does it mean for a directory to have size 0 instead of 4096? Filesystem is ext4 on fedora core 14. The output of mount is: /dev/mapper/vg_dev-lv_root on / type ext4 (rw) proc on /proc type proc (rw) sysfs on /sys type sysfs (rw) devpts on /dev/pts type devpts (rw,gid=5,mode=620) tmpfs on /dev/shm type tmpfs (rw,rootcontext="system_u:object_r:tmpfs_t:s0") /dev/vda1 on /boot type ext4 (rw) none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw) sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw) Output of du -s /home: 0 /home Output of stat /home: File: `/home' Size: 0 Blocks: 0 IO Block: 1024 directory Device: 15h/21d Inode: 34913 Links: 2 Access: (0755/drwxr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2011-02-07 03:45:46.188995765 -0800 Modify: 2011-02-07 03:11:59.980995019 -0800 Change: 2011-02-06 07:58:45.874995002 -0800

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• Mac OS X: Update Python for Shell

  - by Nathan G.

  So, I see similar questions, but none of the answers work for me. I updated Python to 3.1.3 from 2.6.1. Everything works, except: When I type python into Terminal, I get: Python 2.6.1 (r261:67515, Jun 24 2010, 21:47:49) [GCC 4.2.1 (Apple Inc. build 5646)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> So, how do I change the version of Python that runs in the Shell? I've tried the script that they provide. It adds their directory to my $PATH, but it still doesn't change the version that'd displayed from Terminal. Here's what I get when I echo $PATH: /Library/Frameworks/Python.framework/Versions/3.1/bin:/Library/Frameworks/Python.framework/Versions/3.1/bin:/Library/Frameworks/Python.framework/Versions/3.1/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin It appears that the script provided has added their directory for every time I ran the script (I tried it a few times, naturally). I'll gives links to caps of what is in the other relevant folders it mentions: /Library/Frameworks/Python.framework/Versions/3.1/bin /usr/local/bin /usr/bin Thakns in advance for any ideas!

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• Best way to run site through https on server which can't add additional certs

  - by penguin

  So I'm in a curious situation in that I am using a particular server to host things, which I can't host anywhere else (it has access to user databases etc which can't otherwise be accessed). I've been in quite a bit of discussion with the sysadmin at it looks like the only way to run our site: www.foo.com over https may be through some sort of proxy. Currently, users go to www.foo.com and are redirected to https:// host-server.com/foo, as there is an SSL cert installed on that. I want users to be on https:// www.foo.com. I'm told that for various reasons it's going to be very difficult to add an additional SSL cert to the host server. So I was wondering if it is possible to have the DNS records point to a new server, which then creates the HTTPS connection with the browser. Then it forwards requests to https:// host-server.com/foo and feeds the replies back to the original requester. Does this make sense? And would it be at all feasible? My experience with SSL is limited at best, so thanks in advance for your help :) ps gaps in hyperlinks as ServerFault was getting unhappy with the number of links I was posting!

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• What could be wrong with my VLAN?

  - by Matt

  I've got a VLAN 10 setup as a management VLAN. The management VLAN comes off port 48 and links to another set of switches that do not support VLAN's so it was I believe set up as an untagged access port. In the past this was a different brand of switch and this worked fine. However, since changing to the HP V1910-48G series I can't seem to get this working. I must point out that as far as I'm aware it is wired up properly (I can't check this physically as I'm working remote and have asked the tech who's got access to double check for me). Now I don't have a huge amount of experience with VLAN environments but AFAIK this is right. I've set the port 48 (linked to the management switches) as an untagged port with PVID 10 and access link type. Is this all I'd need to do from a configuration perspective to ensure all devices connected to port 48 would end up being on VLAN 10 and not needing to tag their frames. i.e. the tag would be added by the switch before being forwarded.

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• USB drive errors after airport scan

  - by bobobobo

  Well, I just got a new PNY usb drive and it passed through an airport scanner yesterday. For some reason, I wrote to it and then tried to read from it today, and it gave me a corrupted error! chkdsk reports errors like: Bad links in lost chain at cluster 1179 corrected. Lost chain cross-linked at cluster 1200. Orphan truncated. Lost chain cross-linked at cluster 1228. Orphan truncated. Lost chain cross-linked at cluster 1236. Orphan truncated. Lost chain cross-linked at cluster 1237. Orphan truncated. Lost chain cross-linked at cluster 1244. Orphan truncated. Lost chain cross-linked at cluster 1250. Orphan truncated. Lost chain cross-linked at cluster 1266. Orphan truncated. Lost chain cross-linked at cluster 1278. Orphan truncated. etc. What is this from? Could it possibly be from the airport scanner, or is it likely a defective USB chip? How can I check the chip to see if I should just return/throw it away or continue to use it?

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• How does Subnetting Work?

  - by Kyle Brandt

  How does Subnetting Work, and How do you do it by hand or in your head? Can someone explain both conceptually and with several examples? Server Fault gets lots of subnetting homework questions, so we could use an answer to point them to on Server Fault itself. What is classless routing and why is class-based routing obsolete? If I have a network, how do I figure out how to split it up? If I am given a netmask, how do I know what the network Range is for it? Sometimes there is a slash followed by a number, what is that number? Sometimes there is a subnet mask, but also a wildcard mask, they seem like the same thing but they are different? Someone mentioned something about knowing binary for this? What is NAT (Network Address Translation). Not looking for links to other sites (unless maybe you have one post with a bunch of good ones). I already know how to subnet, I just thought it would be nice if Server Fault had a generic subnetting answer.

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• Seperate external and intranet portals using the same functions .htaccess

  - by jezzipin

  We are currently struggling with setting up rules for a .htaccess file for a website built upon our company product. The product is built using PLSQL and procedures can be accessed using URLs. We use this functionality to present different options to our users. These options can be injected into HTML pages using replacement tags. So, the tag [user_menu] is always replaced with: /wd_portal_cand.menu?p_web_site_id={variable1}&p_candidate_id={variable2} for external sites and /intranet/wd_portal_cand.menu?p_web_site_id={variable1}&p_candidate_id={variable2} for internal sites. The issue we are having is twofold. We need to write our .htaccess rules so that the user can access the functionality whether they are internal or external. So, the links should work as follows: http://www.example.com/wd_portal_cand.menu?p_web_site_id={variable1}&p_candidate_id={variable2} or http://www.example.com/internal/wd_portal_cand.menu?p_web_site_id={variable1}&p_candidate_id={variable2} This is the other problem. As you can see for the internal link above, the procedure needs to be prefixed with internal instead or intranet. We cannot change this in our standard tags as this will affect other sites so we need to achieve this also using htaccess. Could anyone assist with this issue? I apologise if this is brief or confusing but it's something i've never done before and have been given the task of doing. I apologise for the lack of code that will be posted above however I am a front end developer and have been left to make these changes having no prior experience of .htaccess to please bare with me.

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• For Windows XP: How to uninstall Broadcom Bluetooth software that won't disappear

  - by T. Webster

  Hello, my situation is similar to this question for Windows 7, except my OS is Windows XP SP3. I have recently realized I made the mistake of buying a Bluetooth adapter and installing the Broadcom/Widcomm Bluetooth stack driver software. Now that I know that the software is no good, I want to install it (so I can install the Toshiba stack for the Cirago adapter). I've attempted to uninstall all Bluetooth driver software in Device Manager, and I don't see any remnants of any Bluetooth drivers there. I would include pictures here, but I don't have 10 reputation yet, so I'll just use links instead. picasaweb.google.com/lh/photo/2NAos6BP9UigPtJKaYRGyQ?feat=directlink But I do see that the little Bluetooth icon still persists: picasaweb.google.com/lh/photo/kbxgPP8ZLxhjX4ob2YjSew?feat=directlink I don't see anything about Bluetooth, Broadcom, or Widcomm in Add/Remove Programs. I don't see any folder names Broadcom or Widcomm in Program Files folder, either. But I do see that Broadcom does show up in the registry with respect to Bluetooth, as shown here. picasaweb.google.com/lh/photo/hWDo-OzB8ApibzeHA_saxQ?feat=directlink What should I do now to completely wipe this persistent Broadcom Bluetooth software off my computer?

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• a brand new FS based on a database without using fuse

  - by Devrim

  hi all, To serve millions of files out of a single directory, being able to connect to a drive from hundreds of endpoints, and for some other reasons (to avoid gluster/nfs/all fs based networking solutions), I want to evaluate the possibility of making a filesystem that's based on a mongodb (or any other). Basically, it works like fusefs, every single file is kept in mongo gridfs. In theory, I do, mount mongodbfs /mountPoint mongodb://localhost then when i say touch /mountPoint/test.txt this file is inserted into mongodb. This FS will also store uid/gid and perms with the file, we can throw hundreds of servers to it, and no useradd will be necessary. I'm not thinking to include all the features of FS, just the ones we need. My question is, how do I start my quest in finding resources, books, links, people, developers who'd help me implement this? at least a proof of concept. Is it feasible? What should I expect as a timeline for such undertaking? Please only think about gazillion small files and folders.

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• What are these isolated resource requests in Apache's access_log?

  - by Greg

  I was looking at my Apache access log and came across some strange requests. A single IP address will access several resources (mostly css style sheets and images), but no actual pages. Sometimes they are requesting a resource that no longer exists on the server, or one that is still under the web root but no longer used (e.g. a resource in an old WordPress theme). Also: The requests list no referrer I get no useful information on the IP address by looking it up There doesn't seem to be any pattern among the IP addresses that are making these requests (e.g. different countries) Are these just links from a stale cache somewhere? Could it be a sign of an attack of some sort? Here is a typical example: GET /wp-content/themes/my-theme/images/old-image.gif HTTP/1.1" 500 809 "-" "Mozilla/4.0 (compatible;)" This was one of about 10 similar requests, some for existing resources, some for older resources. There is no other sign of this IP address in access_log. Note the internal server error, which is a topic for a different thread. What I'm asking here is where would isolated requests like this come from?

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• MySQL config for 2GB ram

  - by Tiffany Walker

  How is my config? Does it work well for 2GB? What would be an ideal config for a 2GB ram server? [mysqld] set-variable = max_connections=500 log-slow-queries safe-show-database local-infile=0 skip-networking symbolic-links=0 max_connections = 500 key_buffer = 256M myisam_sort_buffer_size = 64M join_buffer_size = 2M read_buffer_size = 2M sort_buffer_size = 2M read_rnd_buffer_size = 2M thread_concurrency = 16 table_cache = 1024 thread_cache_size = 50 wait_timeout = 7200 connect_timeout = 10 tmp_table_size = 32M max_allowed_packet = 160M max_connect_errors = 10 query_cache_limit = 1M query_cache_size = 32M query_cache_type = 1 [mysqld_safe] open_files_limit = 8192 [mysqldump] max_allowed_packet = 16M [myisamchk] key_buffer = 64M sort_buffer = 64M read_buffer = 16M write_buffer = 16M UPDATE 2012-03-28 12:58 EDT By RolandoMySQLDBA Please run these queries and paste them into your question: For MyISAM SELECT CONCAT(ROUND(KBS/POWER(1024, IF(PowerOf1024<0,0,IF(PowerOf1024>3,0,PowerOf1024)))+0.4999), SUBSTR(' KMG',IF(PowerOf1024<0,0, IF(PowerOf1024>3,0,PowerOf1024))+1,1)) recommended_key_buffer_size FROM (SELECT LEAST(POWER(2,32),KBS1) KBS FROM (SELECT SUM(index_length) KBS1 FROM information_schema.tables WHERE engine='MyISAM' AND table_schema NOT IN ('information_schema','mysql')) AA ) A, (SELECT 2 PowerOf1024) B; For InnoDB SELECT CONCAT(ROUND(KBS/POWER(1024, IF(PowerOf1024<0,0,IF(PowerOf1024>3,0,PowerOf1024)))+0.49999), SUBSTR(' KMG',IF(PowerOf1024<0,0, IF(PowerOf1024>3,0,PowerOf1024))+1,1)) recommended_innodb_buffer_pool_size FROM (SELECT SUM(data_length+index_length) KBS FROM information_schema.tables WHERE engine='InnoDB') A, (SELECT 2 PowerOf1024) B;

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• Faster, secure, protocol/code required for long-distance transfer.

  - by Chopper3

  I've ran into a problem and I'm looking for a new secure protocol/client/server that's faster over a 1Gb/s fibre link - let me tell you the story... I have a pair of redundant, diversely-routed, 1Gb/s links over a distance of around 250 miles or so (not dark fibre but a dedicated point to point link, not a mesh). At the 'client' end I have a HP DL380 G5 (2 x dual-core 2.66Ghz Xeon's, 4GB, Windows 2003EE 32-bit), at the 'server' end I have a HP BL460c G6 (2 x quad-core 2.53Ghz Xeons, 48GB, Oracle Linux 5.3 64-bit). I need to transfer around 500 x 2GB files per week from the client to the server machines per week - but the transfer NEEDS to be secure. Using both iPerf or regular FTP I can get ~80MB/s of transfer pretty consistently, which is great. Using WinSCP or Windows SFTP I can't seem to get more that ~3-4MB/s, at this point the server's CPU is 3% busy while CPU0 of the client goes to ~30% utilised. We've tried editing various TCP window sizes with little success. Both ends are connected to quite low-usage Cisco Cat6509's with Sup720's. I can replace the client machine with a newer machine and/or move it to Linux - but this will take time. Clearly these single-threaded secure Windows clients are introducing too much latency doing their encryption. So a few questions/thoughts; Are there any higher performing secure protocols or client software for Windows that I could try? I'm pretty protocol-gnostic so long as it'll work between Windows and Linux. Should I be using hardware to do the encryption, either in the client or the network parts? If so what would you recommend? I'm not convinced that just swapping the server would be that much faster, the CPU was only at 30% but then again that's higher than I'd have expected given the load - moving to Linux at the client end may be a better idea but would be quite disruptive. Am I missing a trick? Thanks in advance.

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• unable to set xmx beyond 4gb on system having 8gb RAM

  - by Arun

  I need to set ANT_OPTS=-Xms1024m -Xmx6144m -XX:PermSize=1024m -XX:MaxPermSize=1024m JAVA_OPTS=-Xms1024m -Xmx6144m -XX:PermSize=1024m -XX:MaxPermSize=1024m I have a system with 8gb(recently upgraded from 4 gb) But once i set the ant opts to above said value I am not able to run any of my ant targets and I get the following error [ERROR] Argument error: -Xmx6144m [ERROR] Specified maximum heap size (6144 MB) is larger than the address space on this platform (4 GB). [WARN ] -XX:PermSize=1024m is not a valid VM option. Ignoring [WARN ] -XX:MaxPermSize=1024m is not a valid VM option. Ignoring Could not create the Java virtual machine. This indicates the Java that I have on my system java version "1.6.0_20" Java(TM) SE Runtime Environment (build 1.6.0_20-b02) Oracle JRockit(R) (build R28.1.0-123-138454-1.6.0_20-20101014-1351-windows-x86_64, compiled mode) and I am running a Windows 7 on Intel Core 2 duo 3Ghz processor and 8gb RAM Any pointers in solving this issue would be of great help. PS: I did google for the error and it was one of my 1st such occurence where I didnot get any links pointing to the specific solution. Maybe no one has encountered such a scenario

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• How can I use my cell phone to establish a dial-up networking connection?

  - by gWiz

  I am using Windows 7 and have a BlackBerry with T-Mobile (U.S.). I have paired the phone with my computer over Bluetooth, which automatically creates a serial port for it. I am able to open the port in PuTTY and successfully issue AT commands to the modem, including dialing. However, while using Windows to create and establish a Dial-Up Networking connection, I get an error dialog stating "Error 678. The remote computer did not respond." In my testing, I also tried setting up a connection to dial a number connected to a phone. When attempting to connect over this connection, the phone does ring but the very moment I answer the call, my computer displays the above error dialog. What must be done to successfully establish such a PPP connection? Some special AT initialization string perhaps? To clarify, I'm not referring to the well-described and popular technique known as "tethering," in which the remote host of the data link is the mobile service provider. I am interested specifically in establishing direct data links with remote hosts other than my mobile service provider. Think old-school landline connection to your friend's computer or BBS. Edit 1 As grawity pointed out in comments, the missing piece of the puzzle is the actual modulator that is compatible with v-series protocols, which I expected to be built into the cellphone. So far the best only software alternative I could find is this experimental project. Edit 2 Found this forum discussion today. The participants state that there is no old-school modem in the BlackBerry. Edit 3 When I place a call in PuTTY with ATD, immediately after the call is answered (and the callee is initiating the handshake) the cellphone returns OK. This is not the expected behavior for establishing a data connection. The phone should reciprocate the handshake, and upon success return CONNECT. (Alternatively it should return BUSY or NO CARRIER, but never simply OK.) Windows DUN must be interpreting this as the "Error 678" I was seeing.

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• organizing my music and my itunes

  - by Cawas

  What can we do to organize our music? I've got over 20k items on my iTunes Library, at least 5k with ratings and play counts, apparently just 12k music files and I can't understand how this question have not been properly answered yet. Maybe there is no answer. I have too many duplicates, broken links, bad music, corrupted files... Well, a big mess with no tags! Probably there's no single software capable of just organizing everything, though I'd love one. Hopefully some time in the near future we all will be able to just sync the cloud of our automagically selected music to the newly created offline copy. But meanwhile... Please, do consider I've at least gave a shot (even while not a full test drive) to every single answer linked here already, plus a few more. I'm fine with using other software (mac too, please) to organize, but I'd need it to sync (retrieve and put back) at least iTunes ratings, because of iPhone and smart playlists. Not looking for iTunes replacement. I'm hoping to hear what you hardcore music organizers out there are using as your own solutions! :) I myself am using way too many tools, getting way too little done and end up going song by song.

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• Virtualbox Networking: XP Guest, Ubuntu Host: Connecting to Windows servers & local network?

  - by user51833

  Here's what I have: Windows XP running in VirtualBox 3.0.8_OSE r53138; Host OS = Ubuntu 9.10 "Karmic Koala"; Windows network in my office with smb fileservers; Guest OS is connected to the internet and is sharing folders with Host OS; Limited networking expertise. Here's what I actually need to do: Use MS Outlook in my XP guest with all its calendar-sharing features and stuff (if this is all done through the internet then great) - or find a Linux app that can do the same stuff; Map Windows network servers, eg. smb://server01/ in my XP guest (I can already access these in Ubuntu. Here's what I've tried with no luck: Entering the server address (example above) in my XP guest windows explorer address bar (got a "could not access the file, path or drive" error message - maybe if I could enter login/pass information? But I don't know how); Mapping the server as a network drive (Windows could not find the path); Mounting the server as one of my shared folders (I couldn't find it through the shared folders browser in VirtualBox - is there somewhere in the Linux filesystem that Ubuntu keeps links to mounted servers?).

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• Encrypted Windows 7 & Linux Advice Wanted

  - by Miles

  I would like to set up my laptop to dual boot Arch Linux and Windows 7 with file sharing and encryption. Just wanted some advice on going about this because I have not dealt with encryption nor file sharing. I have two 500GB hard drives, and this is my plan: Install Windows 7 across both hard drives Use a live CD to wipe out Windows boot loader and replace with Grub Legacy Use live CD to wipe out second hard drive and re-size the Windows partition located on first hard drive Install Arch Linux along side with Windows 7 on first hard drive, all remaining space goes to home folder as ext2 Install truecrypt and ext2fsd Concerns: Is this the most efficient way to share files between both OSes? Or should I just be using NTFS to store all my data? How would the file permissions work when sharing files between Windows and Linux? Is there a high likley hood of corruption, and what is the ease of backing up files from an encrypted disk? Anything I should look out for, conflict between Grub and Truecrypt? Thank you for any advice, and feel free to post any links you might find useful to me. I am trying to plan this out so I can minimize downtime as I do not want to spend more than a night on this, nor do I want to run into a major problem some time in the future.

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• Why is there no /usr/bin/ in windows? Would it be dangerous to the entire Program Files to the path?

  - by dotancohen

  I am a Linux user spending some time in Windows and I'm trying to understand some of the Windows paradigms instead of fighting them. I notice that each program installed in the traditional manner (i.e. via orgasmic installers: Yes, Yes, Yes, Finish) adds the executables to C:/Program Files/foo/bar.exe and then adds a shortcut to the Desktop / Start Menu containing the entire path. However, there is no common directory with links to the software, i.e. C:/bin/bar.exe which would link to C:/Program Files/foo/bar.exe. Therefore, after installing an application the only way to use the application is via the clicky-clicky menus or by navigating to the executable in the filesystem. One cannot simply Win-R to open the run dialogue and then type bar or bar.exe as is possible with notepad or mspaint. I realize that Windows 8 improves on this with the otherwise horrendous Start Screen which does support typing the name of the app, but again this depends on the app having registered itself for such. Would I be doing any harm by adding C:/Program Files recursively to the Windows path? I do realize that there will be name collisions (i.e. uninstall.exe) but could there be other issues?

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• Cisco configuration for public library internet

  - by AlternateZ

  I'm a C/C++ computer programmer turned IT support guy working for a public library. My day is usually spent helping random grandparents learn how to use email, so my networking knowledge is limited to what I can glean from google. Here's the situation. We have a public library with 20 PCs on a LAN and also public wifi access. Previously we were running all of this on 1 ADSL connection and people complained about low speeds. We hired a networking company to set up a Cisco dual-WAN router for us, and purchased an additional ADSL connection. The intention was to give the LAN PCs a guaranteed amount of bandwidth each, and then let the wifi users split the rest. The results were far worse than what we expected, and all we got from the company was excuses and they've since washed their hands of us. During busy periods, net performance on the LAN PCs are so poor that attaching files to gmail etc often times out and fails - far from the "guaranteed amount of bandwidth each" that we hope for! Sometimes it feels like performance is worse than before when we had 1 ADSL link and an unconfigured router? Anyways, surely this is a problem encountered a million times over across the world? (Sharing internet across many users effectively.) What are standard solutions for something like this? I admit to not even knowing the right jargon to google for (load balancing?) I'd appreciate any links to resources/guides that might help me get a better understanding of the problem/solutions, and perhaps some stories of your own experience in solving similar problems. This will help us evaluate and negotiate with network consultants in the future. If its relevant, our router config contains a section "policy-map" with "bandwidth percent" for each class of user (LAN, wifi), and "fair queue".

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• Removing Paths/ Landing Pages From SharePoint Search Results

  - by j.strugnell

  Hi there, We've been asked by a client to remove a number of pages from being shown up in their public website search results page. I've been into the SSP and created Crawl Rules to remove these pages. All seemed to have worked ok but we have an issue in that landing pages are still showing up in their "www.domain.com/sitearea/" form but not in their "www.domain.com/sitearea/pages/default.aspx". For each of this type of page we have created one rule to "Exclude" the "aspx" path and another rule to include the "/" path but to "Follow links on the URL without crawling the URL itself". We tried adding rules to exclude the "/" format but that only resulted in all results underneath that being excluded. Does anybody know how to remove the "area/pages/default.aspx" and the "area/" pats from Search Results? I'm not sure if it's the "done thing" to ask 2 questions in one but this is in a similar vein so it should be ok. I was wondering if anyone knew of a tool (or if it is possible) to allow site admins to exclude pages from search results (not via SSP/Crawl Rules). I know they can do it at the site level but I was wondering if anything out there enabled this to be done at the page level through either Page or Site Settings?

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• Printing a PDF results in garbled text (sometimes)

  - by Scott Whitlock

  We have a system that renders a report as a PDF, and displays it in the browser for the user. In the browser, the document always appears to display fine, but when printed on one machine, it sometimes changes some of the data in the report to seemingly random characters. Here are some examples of the strings it inserts: Ebuf; Bvhvt ul1: -!3122 Ti jqqf e!Wjb; Nfttf ohf s!Tf swjdf Additionally, the inter-character spacing is weird. It sometimes writes characters overlapping each other. I noticed some repetition in the garbled text, so I typed a few of them into Google, and surprisingly got a lot of hits. Here is the string I searched for: pdf cjmp ebuf nftf up! The Google search summaries contain the garbled text. However, when I click on those links in Google, I get perfectly readable PDF files. It's as if Google's PDF crawler has the same bug. Has anyone figured this out? Is this an Acrobat Reader bug?

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• Is It Possible To Self-Teach PHP, Wordpress, CentOS (Linux), Apache, Nginx etc?

  - by Aahan

  consider me a total noob, who uses a Windows PC and has never touched Linux. But I want to administer, manage and take responsibility of my server, at least at some point, if not now. But since I am a full-time blogger I am unable to find time to study at an institute. So, here is my question — - Is It Possible To Self-Teach HTML, CSS, PHP, JavaScript, Wordpress, CentOS (or for that matter any Linux distro), Apache, Nginx, and Varnish? Yes, beginning with HTML, absolutely all of them. I might seem overly ambitious and foolish, but I just want to do it. Aren't there any self-taught server admins? (1) Please help me out with the names of good books, links and whatever you can. (2) How long would it take me to get there (approximately)? 3 years? 5 years? (I have good touch with HTML & Wordpress.) This is a great community, I hope at least some of you will shoot some suggestions at me.

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• How to Set Up an SMTP Submission Server on Linux

  - by Kevin Cox

  I was trying to set up a mail server with no luck. I want it to accept mail from authenticated users only and deliver them. I want the users to be able to connect over the internet. Ideally the mail server wouldn't accept any incoming mail. Essentially I want it to accept messages on a receiving port and transfer them to the intended recipient out port 25. If anyone has some good links and guides that would be awesome. I am quite familiar with linux but have never played around with MTA's and am currently running debian 6. More Specific Problem! Sorry, that was general and postfix is complex. I am having trouble enabling the submission port with encryption and authentication. What Works: Sending mail from the local machine. (sendmail [email protected]). Ports are open. (25 and 587) Connecting to 587 appears to work, I get a "need to starttls" warning and starttls appears to work. But when I try to connect with the next command I get the error below. # openssl s_client -connect localhost:587 -starttls smtp CONNECTED(00000003) depth=0 /CN=localhost.localdomain verify error:num=18:self signed certificate verify return:1 depth=0 /CN=localhost.localdomain verify return:1 --- Certificate chain 0 s:/CN=localhost.localdomain i:/CN=localhost.localdomain --- Server certificate -----BEGIN CERTIFICATE----- MIICvDCCAaQCCQCYHnCzLRUoMTANBgkqhkiG9w0BAQUFADAgMR4wHAYDVQQDExVs b2NhbGhvc3QubG9jYWxkb21haW4wHhcNMTIwMjE3MTMxOTA1WhcNMjIwMjE0MTMx OTA1WjAgMR4wHAYDVQQDExVsb2NhbGhvc3QubG9jYWxkb21haW4wggEiMA0GCSqG SIb3DQEBAQUAA4IBDwAwggEKAoIBAQDEFA/S6VhJihP6OGYrhEtL+SchWxPZGbgb VkgNJ6xK2dhR7hZXKcDtNddL3uf1YYWF76efS5oJPPjLb33NbHBb9imuD8PoynXN isz1oQEbzPE/07VC4srbsNIN92lldbRruDfjDrAbC/H+FBSUA2ImHvzc3xhIjdsb AbHasG1XBm8SkYULVedaD7I7YbnloCx0sTQgCM0Vjx29TXxPrpkcl6usjcQfZHqY ozg8X48Xm7F9CDip35Q+WwfZ6AcEkq9rJUOoZWrLWVcKusuYPCtUb6MdsZEH13IQ rA0+x8fUI3S0fW5xWWG0b4c5IxuM+eXz05DvB7mLyd+2+RwDAx2LAgMBAAEwDQYJ KoZIhvcNAQEFBQADggEBAAj1ib4lX28FhYdWv/RsHoGGFqf933SDipffBPM6Wlr0 jUn7wler7ilP65WVlTxDW+8PhdBmOrLUr0DO470AAS5uUOjdsPgGO+7VE/4/BN+/ naXVDzIcwyaiLbODIdG2s363V7gzibIuKUqOJ7oRLkwtxubt4D0CQN/7GNFY8cL2 in6FrYGDMNY+ve1tqPkukqQnes3DCeEo0+2KMGuwaJRQK3Es9WHotyrjrecPY170 dhDiLz4XaHU7xZwArAhMq/fay87liHvXR860tWq30oSb5DHQf4EloCQK4eJZQtFT B3xUDu7eFuCeXxjm4294YIPoWl5pbrP9vzLYAH+8ufE= -----END CERTIFICATE----- subject=/CN=localhost.localdomain issuer=/CN=localhost.localdomain --- No client certificate CA names sent --- SSL handshake has read 1605 bytes and written 354 bytes --- New, TLSv1/SSLv3, Cipher is DHE-RSA-AES256-SHA Server public key is 2048 bit Secure Renegotiation IS supported Compression: NONE Expansion: NONE SSL-Session: Protocol : TLSv1 Cipher : DHE-RSA-AES256-SHA Session-ID: E07926641A5EF22B15EB1D0E03FFF75588AB6464702CF4DC2166FFDAC1CA73E2 Session-ID-ctx: Master-Key: 454E8D5D40380DB3A73336775D6911B3DA289E4A1C9587DDC168EC09C2C3457CB30321E44CAD6AE65A66BAE9F33959A9 Key-Arg : None Start Time: 1349059796 Timeout : 300 (sec) Verify return code: 18 (self signed certificate) --- 250 DSN read:errno=0 If I try to connect from evolution I get the following error: The reported error was "HELO command failed: TCP connection reset by peer".

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• Combat server downtime by duplicating server and re-routing when main server is down

  - by Wasim

  I have a CentOS server which at times either crashes or gets attacked with DDOS. At the moment I have an off site backup which is filled up with 1.7TB of data. I'm currently paying as much for the backup as I am for the server and I was looking for advice from experienced people as to what option is best to proceed from here. Would it be a viable solution to ditch the offsite backup, and instead purchase an additional server which is an exact duplication of the first server. So if the first server is down, users are re-routed to the second server without noticing the first server is even down. This would create an automatic backup of the first server (albeit not offsite) and relinquish the need for the expensive offsite backup. Is the above solution a true solution to pricey backup or is offsite backup absolutely necessary? How would I go about doing this (obviously it's pretty complex so just links to some reading material or the terminology of the procedure would be great)? Appreciate the help and advice.

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• Setting up Virtual Host in Fedora Core 15 using apache

  - by Roland

  I'm trying to setup a couple of Virtual Host files on my Localhost PC running Fedora Core 15. Now I get this working, but now onloy one Virtual Host site works, and if I type in 127.0.0.1/test/testApp.php which is not related to the Virtual Host site , I get redirected to the Virtual Host site. Here's what I did. I created a new folder called virtualhosts in /etc/httpd/ where all my host files are stored in the following format site.conf In /etc/conf/httpd.conf I enabled NameVirtualHost *:80 and included the host files at the bottom of the config page like this Include virtualhosts/*.conf In /etc/hosts I added the line 127.0.0.1 website No when I run sudo httpd -t I get Syntax OK I restart apache and then the Virtualhost works, but as soon as I add other hosts and only use 127.0.0.1 as above it still links to the original host. Am I doing anything wrong here or left out something? An example of my Virtual Host file looks like this <VirtualHost *:80> ServerAdmin [email protected] DocumentRoot /var/www/html/website/ ServerName website ServerAlias website ErrorLog logs/dev-error_log CustomLog logs/dev-access_log common Alias /blog /var/www/html/blog/ <Directory /var/www/html/website/> Options FollowSymLinks Allow Override All Order allow,deny allow from all </Directory> #php_value error_reporting E_ALL & ~E_NOTICE & ~E_DEPRECATED php_flag display_errors On php_value date.timezone Europe/London </VirtualHost>

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