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• installing old MySQL client libraries (libmysqlclient.so.15, libpq.so.4)

  - by Elijah Paul

  I'm attempting to install Nagios plugins on a Zimbra 8.0.2 server running CentOS 6.4, but have run into the following error when I run yum install nagios-plugins-all Error: Package: nagios-plugins-mysql-1.4.15-2.el5.x86_64 (epel) Requires: libmysqlclient.so.15()(64bit) Error: Package: nagios-plugins-pgsql-1.4.15-2.el5.x86_64 (epel) Requires: libpq.so.4()(64bit) Error: Package: nagios-plugins-mysql-1.4.15-2.el5.x86_64 (epel) Requires: libmysqlclient.so.15(libmysqlclient_15)(64bit) You could try using --skip-broken to work around the problem You could try running: rpm -Va --nofiles --nodigest How can I install these libraries (libmysqlclient.so.15 & libpq.so.4)? Will installing these libraries possibly break Zimbra?

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• In MySQL 5.1 InnoDB, does the maximum length of a VARCHAR affect secondary index size?

  - by e_tothe_ipi

  Assuming the data is the same either way, does the maximum length of the VARCHAR affect the space usage of a secondary index? Does InnoDB use fixed length records for indexes? Assume that we're talking about MySQL 5.1, with the InnoDB COMPRESSED table format and that the field in question is defined as a VARCHAR with some length less than or equal to 255 (so that it uses only one byte for the offset). Here is the use case: I have a server with a very large table (several gigabytes). One of the fields is currently VARCHAR(7). We need it a little longer and we are thinking of making it VARCHAR(255), but we are worried that it bloat the index.

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• Fastest way to move files from a guest VM to the host?

  - by iTayb

  Hey there. I'm looking for the fastest way to copy files from a VM to physical servers. Setting up a network between them isn't a thing I'd like to do. I believe it is much more secure when not having one. VMware suggests using the Copy-VMGuestFile cmdlet from their PowerCLI interface, however I find it slow (Running at approximately 1.5MB/s). I thought of the following: Creating a new virtual hard drive, moving the files in, and download the .vmdk file from the server, then extracting it locally. It is possible, however will not work with working VMs, and I don't want to shut-down the VM every time I want to move files. Use the virtual floppy device and download the .flp file. It works even if the VM is running, but it is limited to 2.8MB. Do I have any other way? I'm using ESXi 4.1. Thanks.

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• Logging Bounced messages to a Database (Postfix with virtual domains/users)

  - by Gurunandan

  We have a postfix installation with a couple of virtual domains each with virtual users. These domains and users are mapped using a mysql database. I have been until now tracking bounces by parsing the postfix log file. I suspect there must be better and more efficient ways of doing this. I thought of three but I am not sure what is best: Write a Postfix content filter that logs the bounce and throws away the mail Use procmail - but I am not sure how procmail would work with virtual users who have no $HOME defined Write a script that POPs mail from mailboxes; parses and logs them and deletes the bounced email I would appreciate advise on which would be best from a maintenance point of view and efficient from conserving server resources point of view. Thanks

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• Which Apache modules are safe to disable?

  - by Gaia

  Each Apache process is using about 70MB of private/rss memory, so I would like to lean them up a bit. The server runs Magento and Wordpress only. PHP is run as fcgid. Which modules would you consider safe to disable? Loaded Modules: core_module (static) mpm_prefork_module (static) http_module (static) so_module (static) auth_basic_module (shared) auth_digest_module (shared) authn_file_module (shared) authn_alias_module (shared) authn_anon_module (shared) authn_dbm_module (shared) authn_default_module (shared) authz_host_module (shared) authz_user_module (shared) authz_owner_module (shared) authz_groupfile_module (shared) authz_dbm_module (shared) authz_default_module (shared) ldap_module (shared) authnz_ldap_module (shared) include_module (shared) log_config_module (shared) logio_module (shared) env_module (shared) ext_filter_module (shared) mime_magic_module (shared) expires_module (shared) deflate_module (shared) headers_module (shared) usertrack_module (shared) setenvif_module (shared) mime_module (shared) dav_module (shared) status_module (shared) autoindex_module (shared) info_module (shared) dav_fs_module (shared) vhost_alias_module (shared) negotiation_module (shared) dir_module (shared) actions_module (shared) speling_module (shared) userdir_module (shared) alias_module (shared) substitute_module (shared) rewrite_module (shared) proxy_module (shared) proxy_balancer_module (shared) proxy_ftp_module (shared) proxy_http_module (shared) proxy_ajp_module (shared) proxy_connect_module (shared) cache_module (shared) suexec_module (shared) disk_cache_module (shared) cgi_module (shared) version_module (shared) sed_module (shared) security2_module (shared) unique_id_module (shared) fcgid_module (shared) evasive20_module (shared) perl_module (shared) php5_module (shared) ssl_module (shared) dav_svn_module (shared) authz_svn_module (shared)

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• Redmine on Redhat/CentOS 5 Without using virtual hosts

  - by flyclassic

  I've have followed all the steps to install Redmine on CentOS 5, except for the Apache part: http://www.redmine.org/projects/redmine/wiki/HowTo_install_Redmine_on_CentOS_5 I do not want to configure a virtualhost as we are not using virtual hosts. Can I configure Redmine to run with http://hostname/redmine? Apparently it doesn't work for my case. Redmine was extracted in to the webserver document root /var/www/html/ called /var/www/html/redmine What I did was added a redmine.conf to /etc/httpd/conf.d/ with the following configuration and restarted the server: <Location "/redmine"> Options Indexes ExecCGI FollowSymLinks -MultiViews Order allow,deny Allow from all AllowOverride all PassengerEnabled On RailsBaseURI /var/www/html/redmine RailsEnv production </Location> now i got this error Further information about the error may have been written to the application's log file. Please check it in order to analyse the problem. Error message: No such file or directory - config/environment.rb Exception class: Errno::ENOENT Application root: /var/www/html Where have I gone wrong?

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• How to determine source of file corruption for downloaded images?

  - by sunpech

  I've been downloading Visual Studio 2010 off of the Dreamspark.com website using Akamai Downloader. The .img file is 2.2 GB in size. I've downloaded it twice so far, and when I try to mount it using Gizmo, it complains that "the disk structure is corrupted and unreadable". The drive does mount, but it is unreadable. Is there a way to determine where the source of the data corruption is coming from? Is it my computer as it's receiving it? The hosting server(s)? My ISP? My router? My ethernet cable? It's a hefty download to do again and again from home, only to find out once it's fully downloaded that it's unreadable. I think I can almost rule out my PC, router, and ethernet cable, as I've been able to download various other files without corruption. Note: There is no checksum to verify against

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• Different color prompts for different machines when using terminal/ssh?

  - by bcrawl

  I have 5 machines I constantly ssh into to do work. Its getting increasingly frustrating when I am issuing wrong commands on wrong boxes. Luckily I havent done anything bad yet. I wanted to know if there is any hack which I can hardcode which will display my prompt in different colors based on the machine I am ssh into? Such as blue for desktop1, purple for laptop, red for server etc? Is this possible? Currently I am using this command export PS1="\e[0;31m[\u@\h \W]\$ \e[m " taken from here http://www.cyberciti.biz/faq/bash-shell-change-the-color-of-my-shell-prompt-under-linux-or-unix/ but it obviously doesnt work across ssh. Also, if you have any other cool bash tips for helping me ease my sight will be wonderful. I got this tip which colors the man pages. http://linuxtidbits.wordpress.com/2009/03/23/less-colors-for-man-pages/

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• How to send massive mail in Window [closed]

  - by Magic

  I'm looking for a solution that can send massive mail in Windows. I'm not spaming. My company want to send mail to our user. I don't want to use third party smtp server(like google mail). Because it'll ask captcha when sending several mail continuously. Please suggest me some solution. EDIT: I only want to send mail in Windows. Massive only means several hundreds mail per days. I just want to send our product information to our user.

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• Swiching webhosting company & database erros.

  - by gipap

  Well here comes the situation. I used to have CompanyA for webhosting. (The hosting plan was a shared one). I decided to change the hosting provider and transfer my website to CompanyB, (exclusive IP). The issue that i face is that my webpage is now displayed in two different IP addresses. So i decided to turn-off the website served by the CompanyA. Now the problem is that my database driven website, served by CompanyB, is not driven anymore, although i have added the A record mssql.mywebsite.com with the ipaddress of the database. (The database is served by dedicated db's server). So, what am i doing wrong here?

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• built in "Offer Remote Assistance" not working because of permissions

  - by Caleb_S

  I'm trying to enable permissions for a user on a Windows7 machine to use the built in feature called "Offer Remote Assistance" or "Windows Remote Assistance". This feature works fine if the user is added to the "domain admins" security group, but for security reasons, I cannot leave him in that group. This is within a SBS2003 Domain. I have added the user and also a group that he is apart of to the Small Business Server Remote Assistance Policy, after following some documentation I was able to find, but this has not worked. Can you tell me how to enable this feature for this user and or a user group? http://content.screencast.com/users/CASEIT/folders/Forum%20Pictures/media/2a518bc9-4184-4520-8b76-cdf46555f568/2011-08-18_1330.png

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• Migrating RAID6 array from HP SmartArray P600 to LSI MegaRAID SAS 8888ELP

  - by MLu

  My customer has an external RAID6 array (8x 1TB in HP MSA60 enclosure) attached to HP SmartArray P600 controller. They have now decided to replace the server and the new one comes with LSI MegaRAID SAS 8888ELP. The HW supplier insists the migration is as simple as pulling the eSATA cable from P600 and inserting it into LSI but I'm not convinced. Unfortunately I have nowhere to test, and will have to do the exercise on the production array :( So the question in brief - is it possible to import the HP SmartArray P600-created RAID6 array to LSI MegaRAID 8888ELP?

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• Public IP Routing over Private GRE tunnel

  - by Paul

  I have a GRE tunnel configured between two linux boxes. The tunnel works fine. I can ping from each host the other private ip. Head privateip: 10.0.0.1 publicip: 8.8.8.8 Tail privateip: 10.0.0.2 publicip: 7.7.7.7 The public IP on Tail has the network block 9.9.9.0/23 statically routed over the 7.7.7.7 interface. The idea is to make the 9.9.9.0/23 ips work on servers on the 8.8.8.8 network. I configure the tail host to route the /23 block. I mounted a 9.9 IP on the head server. I can ping the 9.9 ip from the tail to the head. I can't ping the 9.9 ip from the public internet. I think I need to add some other routes because of gateway issues, but I can't seem to wrap my mind around it (not a router guy, just beating my way through something that I have never done before and vaguely understand) --danks

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• PHP cgi locks up and times out.

  - by Oli

  I've got a dozen wordpress sites hosted on a nginx/php-cgi setup. After a variable amount of time (usually not that long, and occasionally very fast) PHP locks up and after 2 minutes (the timeout I set in nginx), it get a 504 timeout. I've tried everything I can think of. I've been using an init script to launch php-cgi but I compiled out php-fpm and tried that for a day with various configurations with the same results. I've tried a low number of PHP_FCGI_CHILDREN. I've tried as high as my RAM will let me. I've tried various settings for PHP_FCGI_MAX_REQUESTS. xcache seemed to exacerbate the issue, so I removed it. The server is a VPS but it has over a gig of ram dedicated to it. All suggestions are welcome at this juncture because I'm desperate.

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• Should `keepalive_timeout` be removed from Nginx config?

  - by Bryson

  Which is the better configuration/optimization: to explicitly limit the keepalive_timeout or to allow Nginx to kill keepalive connections on its own? I have seen two conflicting recommendations regarding the keepalive_timeout directive for Nginx. They are as follows: # How long to allow each connection to stay idle; longer values are better # for each individual client, particularly for SSL, but means that worker # connections are tied up longer. (Default: 65) keepalive_timeout 20; and # You should remove keepalive_timeout from your formula. # Nginx closes keepalive connections when the # worker_connections limit is reached. The Nginx documentation for keepalive_timeout makes no mention of the automatic killing, and I have only seen this recommendation once, but it intrigues me. This server serves exclusively TLS-secured connections, and all non-encrypted connections are immediately rerouted to the https:// version of the same URL.

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• How to build the rpm package with SHA-256 checksum for files?

  - by larrycai

  In standard alone RHEL 6.4 rpm build environment, the rpm packages is generated with SHA-256 check sum, which is gotten by command rpm -qp --dump xxx.rpm [user@redhat64 abc]$ rpm -qp --dump package/rpm/abc-1.0.1-1.x86_64.rpm .. /opt/company/abc/abc/1.0.1-1/bin/start.sh 507 1398338016 d8820685b6446ee36a85cc1f7387d14537d6f8bf5ce4c5a4ccd2f70e9066c859 0100750 user abcc 0 .. While if it is build in docker environment (still RHEL6.4) the checksum is md5 UPDATE Use Ubuntu 14.04 as docker server, Redhat6.4 is the container inside [user@c1cbdf51d189 abc]$ rpm -qp --dump package/rpm/abc-1.0.1-1.x86_64.rpm .. /opt/company/abc/abc/1.0.1-1/bin/start.sh 507 1401952578 f229759944ba77c3c8ba2982c55bbe70 0100750 user abcc 0 .. If I checked the real file, the file is the same [user@c1cbdf51d189 1.0.1-1]$ sha256sum bin/start.sh d8820685b6446ee36a85cc1f7387d14537d6f8bf5ce4c5a4ccd2f70e9066c859 bin/start.sh [user@c1cbdf51d189 1.0.1-1]$ md5sum bin/start.sh f229759944ba77c3c8ba2982c55bbe70 bin/start.sh How I configure rpmbuild to let generated rpm file is SHA-256 based ?

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• How to enable connection security for WMI firewall rules when using VAMT 2.0?

  - by Ondrej Tucny

  I want to use VAMT 2.0 to install product keys and active software in remote machines. Everything works fine as long as the ASync-In, DCOM-In, and WMI-In Windows Firewall rules are enabled and the action is set to Allow the connection. However, when I try using Allow the connection if it is secure (regardless of the connection security option chosen) VAMT won't connect to the remote machine. I tried using wbemtest and the error always is “The RPC server is unavailable”, error code 0x800706ba. How do I setup at least some level of connection security for remote WMI access for VAMT to work? I googled for correct VAMT setup, read the Volume Activation 2.0 Step-by-Step guide, but no luck finding anything about connection security.

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• SBS 2008 Duplicate Files - what can I delete

  - by Stu

  I'm trying to look after my company's SBS 2008 server. It keeps running out of space on the C: (OS)drive, so Exchange stops when it gets down to 4Gb free space. From what I can tell after the last time I had a consultant in to fix it, there should comfortably be about 20Gb. Running a duplicate files report gives me a huge list of duplicated files, and identifies just how much space they are hogging. But my question is, which ones can I delete to recover the space? Can I tell, from what's shown on the report, the files that are redundant and can safely be deleted?

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• Route packets from one VPN to another

  - by Mike

  I have two OpenVPN servers (10.8.0.0 and 10.9.0.0) set up on my OpenSUSE server. Within one network, each computer is visible to any other one, but I'd like to make it so that computers are visible across networks. I'd like to route the packets like this: when a user (say 10.8.0.6) pings an address on the other VPN (10.9.0.6), the packets are routed to the 10.9.0.1 and then to the appropriate computer in this VPN. How do I achieve this using iptables or a different tool? I tried the commands at the end of this section with no avail.

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• Postfix Stagger/Rate Limit Outbound Mail

  - by GruffTech

  We have a server that sends our weekly newsletter to subscribers, To prevent people like Hotmail or Yahoo from blocking us due to sending too many simultaneous emails to them, Is there a way we can stagger email, or rate-limit outbound emails from postfix? Keep in mind, I dont want the mailserver to stop queueing mail or accepting new messages, Simply defer delivery if there are more then 3-4 messages per destination domain/ipaddress, or something similar. Note: I dont want a Sender Throttle, as described in a similar question, here. I'm looking more for a recipient throttle but haven't had any luck finding out how to do so with PolicyD or Anvil services, and was wondering if anyone else has accomplished such a task.

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• Java process failure (hadoop, hbase)

  - by Vladimir

  Anytime I am running hadoop/hbase process from a command prompt I get an error: /usr/local/hadoop/bin/hadoop: line 320: /usr/lib/jvm/jdk1.7.0/bin/java: cannot execute binary file /usr/local/hadoop/bin/hadoop: line 390: /usr/lib/jvm/jdk1.7.0/bin/java: cannot execute binary file /usr/local/hadoop/bin/hadoop: line 390: /usr/lib/jvm/jdk1.7.0/bin/java: Success I get the same kind of error when I start hbase. java version "1.7.0_07" Java(TM) SE Runtime Environment (build 1.7.0_07-b10) Java HotSpot(TM) Server VM (build 23.3-b01, mixed mode) Could you please tell me what could cause the issue? Thank you

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• Giving a normal user and Mysql access to a common directory

  - by James R

  We need a common directory where Mysql can do a SELECT INTO OUTFILE and then the file can be picked up by a virtual server user in /home/theuser and worked on. I can perform the SELECT INTO OUTFILE into the /tmp/ dir but theuser does not have access here. Would it be ok to grant the user access to tmp or is that bad practice? The other option I looked at was creating a group 'theusermysql' containing the mysql user and theuser. I set the group on the tree /home/theuser/thedumpfolder and gave write permissions on thedumpfolder, but for some reason mysql still complains that it cannot write here. I'm completely stumped! What would be the best practice way to have a common folder for these two users?

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• Access denied error when running site with SSL

  - by Gonzalo

  i've setup a SSL certificate to use in a website i'm working on. The problem is that when "Require SSL" is checked in iis, i get the following error while trying to access the site: 403 - Forbidden: Access is denied. You do not have permission to view this directory or page using the credentials that you supplied. If that checkbox is not checked, the site works fine (i'm not sure why, but i can even access it through SSL). Not sure if it makes any difference, but my company has an ISA server that we use as a proxy / firewall. Thanks, Gonzalo

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• www a-record vs cname-record

  - by Sorin Buturugeanu

  Hi! I have a website that I will be hosting DNS for (testing purposes at first and then it will have some limited traffic). I have set up DNS so that site.tld has an A record to the actual IP but I don't know what to do about www.site.tld. Both site.tld and www.site.tld will point to the same server / application so my logic tells me to add a cname record so that www.site.tld becomes an alias for site.tld, BUT, I've been checking my settings with intodns.com and if I only add a CNAME for the www.site.tld it gives me the following error: ERROR: I could not get any A records for www.cexa.ro! (the error clears once I do an A record for www.site.tld to point to the actual IP) I don't know if there is a "rule" that "www." should always be an A record even though it's actually pointing to the same IP / application. Thanks for helping me understand this!

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• Apahce - How to disable gzip content encoding (eg DEFLATE) for one set of URLs?

  - by Rory McCann

  I have a ubuntu apache webserver and I have enabled mod_deflate to gzip all the content. However there's one folder I'd like to disable the mod_deflate for. I was going to do something like this: <Location /myfolder> RemoveOutputFilter DEFLATE </Location> But that doesn't work. Rational: I am trying to debug an XMLRPC server and I am using wireshark to see what gets past in the HTTP requests, since the replies are gzipped, I can't see what's going on.

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