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• Puppet, Nagios, Munin on cPanel based hosts

  - by WinkyWolly

  I've been managing 20-30~ cPanel based hosts over the past year with Puppet, Nagios and Munin for general monitoring / trending however a lot of the methods I've had to use to deploy / manage things such as configurations a pain. For those of you who aren't familiar with cPanel - it adds a few things to yum exclude such as perl*, ruby* and so forth. This causes issues with me being able to bootstrap monitoring on a new server via Puppet (well via the Package type) due to a bunch of conflicts with installing via Yum. Now I could create a custom RPM for everything and remove certain dependencies from the spec file however I would like to avoid this if possible. Does anyone have any proposed functional ways to manage this sort of environment? Currently I install Puppet, Facter and Munin via RPM's and force install using --nodeps and such (since they're installed, just no the ones Yum wants). Nagios I installed manually from source at this time (likely will create RPM's however I want to tackle this general issue first).

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• Is this a normal operating temperature range for a New Third-Generation MacBook Air (2.13 MHz, 120 G

  - by doug

  Even with just my text editor open (no web browser) and maybe the terminal, the baseline temperature is usually above 40 C. When i open 4-5 browser tabs in Safari (even if none of Sites have Flash) the temp can quickly go over 50 C. (In addition, i am observing these temps even though i have turned the fan up to 3000 rpms). (i have install smcFanControl on my MBA so i can see the temp in the menu bar.) So this means my MBA is running much warmer than my MBP; and in practice, it means that i have to be very careful how i use my MBA. Of course if i load a Site with Flash, it just freaks out, and often quickly goes above 65 C (I've installed a flash blocker to avoid this). Is anyone else observing this behavior? I have checked the Apple boards and sure enough, there are a lot of complaints, but nothing from Apple.

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• Removing perl module installed with cpanm

  - by ZeC

  I am Perl beginner. I wanted to use Log::Log4perl module as I am familiar how it works in Java. I used cpanm script to download module, but I ran it without "sudo". Then it installed this module to my dir /home/amer/perl5. Afterwards, I installed it as sudoer, but I want to remove installation in my home dir to avoid any conflicts in future. How can I do that? Here is my cmdline execution stack. Thanks and Regards!

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• Shared block device file system (cluster file system without networking)

  - by fungs

  Is there any file system that can be mounted multiple times and supports concurrent file access for Linux? Basically I want something like a cluster file system but without the need to have a running network for a distributed lock manager. That can be very handy in connection with virtual machines that can share data with the host or another VM without the need to create a network link. This I want to avoid to keep the network architecture secure (virtual machine in DMZ) but share large files. No need to scale it up, just two machines that mount the same block device. Shouldn't it be possible to have file locking information right on the disk?

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• Prevent Ultrabay HDD from ejecting on sleep

  - by Bryce Evans

  I have a lenovo T430s thinkpad with a small SSD primary drive and 500gb ultrabay drive. When I put the computer to sleep and then return, I get the message titled "problem ejecting < drive name " "Windows can't stop your 'Generic volume' device because a program is still using it." This pop up is very annoying every time every time I use the computer. I don't want to disable write caching [D:Hardware[drive]policiesquick removal] because I want best performance and never remove the drive. Any ways to avoid this pop up?

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• Export and import a PostgreSQL database with a different name?

  - by J. Pablo Fernández

  Is there a way to export a PostgreSQL database and later import it with another name? I'm using PostgreSQL with Rails and I often export the data from production, where the database is called blah_production and import it on development or staging with names blah_development and blah_staging. On MySQL this is trivial as the export doesn't have the database anywhere (except a comment maybe), but on PostgreSQL it seems to be impossible. Is it impossible? I've seen out there some people using sed scripts to modify the dump. I'd like to avoid that solution but if there are no alternative I'll take it. Has anybody wrote a script to alter the dump's database name ensure no data is ever altered?

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• Easy shorewall question : allow ips to DNAT

  - by llazzaro

  Hello, At my home network I had a transparent proxy. This is the rule that forward all 80 traffic to my squid3.1 server at DMZ DNAT loc:!10.0.0.126 dmz:172.16.0.198:3128 tcp 80 - !172.16.0.198 Ok, I need to add more ips to avoid transparent proxy. I tried loc:!10.0.0.134,!10.0.0.126...but didnt work (also similars like [ip0,ip1]. I tried to google the answer cant find it (sorry no matches, not searching the right keywords) also I tried to read the docs, but they are really long (and indexes dont help me). Thanks!

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• How to set up memcached to use unix socket?

  - by alfish

  While I could use memcached on Debian to use the default 11211 port, but I've had great difficulty setting up unix socket, Form what I'v read, I know that I need to create a memcache.socket and add -s /path/to/memcache.socket -a 0766 To /etc/memcached.conf and comment out the default connection port and IP, i.e. -p 11211 -l 127.0.0.1 However, when I restart memcached I get internal server errors on Drupal site. I'm trying to implement unix sockets to avoid TCP/IP overhead and boost overal memcached performance, however not sure how much performance gain one can expect of this tweak. I appreciate your hints or possibly configs to to resolve this.

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• Forbid language switch for certain application(s)

  - by Vasiliy Borovyak

  I have a problem of accidental input language switch. I tried many different settings in order to not do it - change hotkey, install some software (Key Switcher, Keyboard Ninja, Punto Switcher)... But nothing helped. I used to certain hotkey (Ctrl+Shift). Any other hotkey make me even more suffer. The software s found has no feature to avoid accidental switches. What I want is to find a piece of software which can stick "English US" input language to my "Visual Studio". And any Ctrl+Shift pushes inside VS should not lead to language switch. Have any ideas?

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• Get active network interface on Windows

  - by Kevin Walzer

  I'm developing an application that provides a UI to windump, the packet sniffer. Windump has a "-D" parameter that lists all network interfaces it can find, and then you can specify which interface to listen on. However, I'd like to avoid forcing the user to manually configure which interface to listen on. On Unix, I can obtain the right network interface (en0, en1, etc.) via a call to ifconfig and some parsing of the output, but I cannot locate any equivalent Windows API or command that can yield similar information--ipconfig doesn't seem to obtain this data. Can anyone suggest either a Windows command-line tool or an API that can be called via VBScript to obtain this data so that I don't have to present the user with a dialog in my GUI telling them to select the right interface?

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• Upgrading OpenSSL in CentOS 5.3

  - by Lin

  I want to use one IP to host many domains with individual SSL certificates (requires SNI). In CentOS 5.3, the latest version of OpenSSL I can find an RPM for is 0.9.8e, which does not support SNI. I want to upgrade to 0.9.8k but I can't find an RPM. I could compile from source, but if I try to remove the existing OpenSSL package through yum, it wants me to remove all packages that depend on OpenSSL (100+ packages). EDIT: I ended up installing 0.9.8k without overwriting the previous version. Now I both avoid breaking dependencies and can use SNI. Was this the best action?

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• Populating cells with data from another spreadsheet after just keying in a few letters

  - by Wendy Griffin

  I have 1 workbook with 2 spreadsheets. Spreadsheet 2 column A contains a long list of company names, Columns B - H contain critical information about the company. Spreadsheet 1 contains all of the columns as Spreadsheet 2 plus some other columns. What I'm trying to achieve is that when you start to type in the first 3 characters of a company name on Spreadsheet 1 it would then have a drop down of the companies (as listed on Spreadsheet 2) that share the first 3-5 letters and you would select one. Upon selecting a company name all of the corresponding company information would populate in the other columns on spreadsheet 1 automatically. This is to avoid copying a row from Spreadsheet 2 and pasting it in Spreadsheet 1. Any help with this would be greatly appreciated. Cheers!

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• How much does it wear an SD card to be frequently removed/reinserted?

  - by jtbandes

  My digital camera (a Sony a55) stores photos on an SD card. When I want to transfer these to my computer (a mid-2010 MacBook Pro), I have two options: use the USB cable to connect the camera to the computer, or use the computer's built-in SD card reader. The camera's SD card slot is the standard click-in, click-out (spring-loaded) mechanism. My laptop has a simple slot into which the card slides with a little more resistance than the former (the card slides only about halfway in so it can be easily removed). I notice that the card's contacts now have some shiny marks from one or both of these card slots: Does this type of wear threaten to significantly damage the card? Should I avoid switching the card between slots frequently, to extend its lifetime?

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• Viewing and deleting partitions using the BIOS?

  - by cluelesscoder

  I have an M4A785TD-M EVO Asus motherboard which uses Asus Express Gate for its motherboard (says American Megatrends, Inc at the bottom). I activate it by pressing Del; also says Tab activates BIOS Post but that doesn't seem to do anything. I went into this expecting to see a breakdown of the partitions. I have a 300GB hard-drive separated into 3 partitions. While it does show SATA for my main hard-drive and my disk drive, it doesn't show the partitions. Is this typical? Do I have to us an OS-based tool to delete the partitions or can I delete using my BIOS? I tried updating the BIOS through Asus's Update utility but it appears to be broken (connects/disconnects repeatedly). I used HWiNFO32 to get some information: BIOS Date: 06/30/10 BIOS Version: 2103 EFI BIOS: Not Capable Tried to update but it directs me to biosagentsplus.com which wants $30 for the download (another question would be how to avoid them).

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• Restoring Box Sync (box.com) using physical media after OS reinstall

  - by sjrm

  I have my Box Folder on a different drive ( D: ) than my Operating System Drive ( C: ) I follow these instructions to set the local folder on the second drive. https://support.box.com/hc/en-us/articles/200852947-How-Can-I-Change-the-Default-Folder-Location-for-Box-Sync- I had to format and reinstall Windows 7, leaving the other drive (D: ) untouched. now i reinstalled Box Sync, and directed it to the same location where i already have all my files. However, Box Sync renamed the folder to (Box ([email protected]) ) as a bckup, and is downloading everything again. As i have like 30Gb of files, and it takes many hour to download them, i just want to use the files that i already have in my local disk. i tried copying all files again to the new local Box Folder, but files started to get duplicated. Is there any way to avoid downloading everything again each time i reinstall my OS ? Thanks

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• iptables: limiting bytes downloaded per IP per day?

  - by Miles

  On a public-facing web server, I'd like to limit the total bytes downloaded per IP address per day. For example, after a visitor downloaded 100MB, any additional requests would be dropped or rejected for the next 24 hours. Is it possible to accomplish this using iptables alone? The connbytes, connlimit, hashlimit, quota, and recent options all look promising, but the man page plays its cards close to the vest (e.g., "quota - Implements network quotas by decrementing a byte counter with each packet. --quota bytes The quota in bytes."). Would like to avoid using a proxy (like Squid) if possible.

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• How to automatically resume php-fpm?

  - by alfish

  I am using nginx+php-fpm on Debian Squeeze for a busy server and have had great difficulty to deal with maximum connections being reached. Here the problem is that php processes sometimes just die randomly under high load and leave the server with no php process. Then I need to manually restart php5-fpm service to bring back the server to life. I am wondering how to avoid this to happen, or at least treat the symptoms by restarting the php5-fpm automatically whenever there is not php process left to listen to incoming requests. My relevant configs are: pm = dynamic pm.max_children = 1400 pm.start_servers = 10 pm.max_spare_servers = 20 pm.process_idle_timeout = 1s; #not sure it will be useful when pm=dynamic pm.max_requests = 100000 request_terminate_timeout = 30 I appreciate your suggestions to cope with this nasty problem.

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• What is the easiest way to get XtraDB for MySQL running on CentOS 5

  - by Jeremy Clarke

  I'm having a lot of issues with a dedicated MySQL server and it seems like upgrading to the XtraDB version of InnoDB will probably have a positive effect, but I'm hesitant to get involved with it since I am not really a sysadmin and prefer to stick with things that start with "yum update". What is the easiest way to get XtraDB installed? Should I use the Percona server? MariaDB? OurDelta? Is there a way to avoid using custom RPMs and sticking to a repo instead? The current yum version of MySQL is 5.0.xx, whereas a lot of the alternate MySQL builds are based on 5.1.xx. How does this factor in? Do I need to figure out 5.1 on CentOS before working on getting XtraDB in? For bonus points: Do I need to seriously test XtraDB with my server before implementing it, or is it relatively safe to have the brief downtime for switching servers followed by putting the site back online with XtraDB?

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• Change install path to /usr/bin instead of /usr/local/bin

  - by user1678788

  A simple question, but I have no concrete documentation to confirm my answer. When installing software with the make install command under a unix machine, the default path is going over to /usr/local/bin. I would like to update a package system-wide under /usr/bin. How (and where) do I change the command under make or make install to /usr/bin? Also - Can the package remain on /usr/local/bin but the systemwide usage of Python (the update being installed) be changed to /usr/local/bin from /usr/bin to avoid modifying the original installed version ?

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• Script or Utility to convert .nab to .csv without importing double entries in Outlook.

  - by Chris

  Currently our environment is migrating from Groupwise 7 to Outlook 2003 and we have multiple users with mission critical outside contacts in their frequent contacts that will have to be imported in Outlook. Currently our only solution is to export GW contacts to a .nab, import to excel to scrub out the contacts in our own domain (to avoid double entry) and convert to .csv. This current solution will require a lot of man hours for hand holding because most of our users are not technically savvy AT ALL and are frankly too busy to do this themselves. Anyone know of any kind of tool or script to assist with this?

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• Avoiding double NAT with PPPoA connection

  - by user498429

  I've got an ASUS RT-N56U wending its way to me and have been thinking about how to set this up on my home network. I currently have a Netgear DG634g V5 and was hoping to use this device as a modem only, with everything else being done by the router. Problem is, my ISP uses PPPoA and the asus seems only to support PPPoE. I'm aware that a double NAT configuration should be avoided and I've seen some instructions here: http://www.tomshardware.co.uk/forum/33700-17-ultimate-modem-router-setup-thread Specifically, I was going to follow the guidance in the section entitled "Chaining Two Networks Together In a Cascading Fashion (Modem handles PPPoA)". That seems like it could work. However, is this a double NAT configuration or even a good way to do it? Would UPnP still work? The other option, I understand, is to buy the Draytek Vigor 120 but I'd ideally like to avoid the cost of that if its not necessary.

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• Get a file from a load balanced server in Windows Server

  - by Leandro

  I've a load balanced server on production environment for my application. The server is on Windows Server 2008 R2. I'm running a web application that creates and save a file into a folder on the web path. So I need to create a job that copy this file into another server. The main idea is that a file watcher checks for the file and then copy it instantly. But how can I know in what server it's the file? Please avoid "why you don't" answers to get a directly answer, if it's someone.

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• phpredis + pconnect

  - by john smith

  I am using phpredis on my php based website. The webserver I am using is a the simplest apache apt-get installation, no configuration involved, as this is only a development environment. The issue I am facing is that basically, while using phpredis, there is no difference between "connect" and "pconnect" commands: they both create a new connection everytime, as I can see from the "info" command on redis-cli. Now, I am pretty sure it is because of the apache configuration and the fact that it probably (most likely) is a multi-threaded env, therefore can't enstablish a single connection. My question is basically for when I will turn into production: what would the best choice of a webserver be to avoid this problem? I remember using lighttpd with thousands of users and still get only a very few (like 2 or 3) connections on mongoDB. Any ideas? Thanks in advance.

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• Minimum space required for Server 2008 R1 install?

  - by Chris J

  I'm trying to plan disk space for a virtual environment, and wanting to keep virtual disks as small as possible - mostly as apart from the base OS, the software going onto the VM is less than a few MB, so want to avoid physical disk space going to waste; plus it'll give me an idea of how many VMs I could physically fit in {x}GB of physical drive. For Server 2003, I've had installs on 2GB and 5GB sized virtual disks. However for Server 2008, Microsoft recommends a minimum of 10GB (I assume this is both for x32 and x64). For the record, I will be installing the x32 version. Now I know I could just go ahead and try a small install, but wanted to solicit any practical knowledge as well :-) What's the smallest install of Server 2008 possible? (excluding server core installations).

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• Redirect To Domain Before SSL Is Read

  - by Devin Dixon

  I had to switch servers and I want to redirect all SSL urls to the non-ssl site. The problem I am running into is the https site still throws invalid certificate error even through apache has the redirect implemented. <VirtualHost *:443> ServerAdmin [email protected] DocumentRoot /data/sites/www.example.com/main/ RewriteEngine on Redirect 301 / http://www.example.com SSLEngine on SSLCertificateFile /etc/httpd/ssl/www.examplecom/ssl-cert-snakeoil.pem SSLCertificateKeyFile /etc/httpd/ssl/www.example.com/ssl-cert-snakeoil.key ServerName www.example.com ErrorLog "logs/example.com-error_log" CustomLog "logs/example.com-access_log" common </VirtualHost> My question is, how can I do a redirect and avoid the invalid ssl certifcation error in the browser?

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