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Scheduling Automatic Backups for Virtual Private Web Server running CENTOS 6.3 and WHM

- by Oliver Farrell

I'm pretty new to administering my own VPS - but thus far am finding it quite a compelling experience. There's something quite refreshing about having complete control over everything it does. One thing that I would like to look at is a suitable backup solution (a few times a day). My current setup is as follows: I'm running a CENTOS 6.3 VPS with a single 25GB hard drive solely for the purpose of hosting websites. I'm using WHM & cPanel for administering them. I now plan on adding an additional hard disk and hooking it up to my VPS. What I'm not sure about is how I get the two disks talking and get the backup process going. I'm not a seasons SSH-er so don't really know where to start. I'm hosting with Serverlove (one of the best hosting providers I've used) and am provided with a number of unique identifiers for each hard disk so I imagine these may play a part in linking them together. I appreciate that this is a little vague (I'm clutching at straws) but any assistance is very much appreciated.

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Is there a command line two-factor authentication verification code generator?

- by dan

I manage a server with two-factor authentication. I have to use the Google Authenticator iPhone app to get the 6-digit verification code to enter after entering the normal server password. The setup is described here: http://www.mnxsolutions.com/security/two-factor-ssh-with-google-authenticator.html I would like a way to get the verification code using just my laptop and not from my iphone. There must be a way to seed a command line app that generates these verification codes and gives you the code for the current 30-second window. Is there a program that can do this?

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Puppet&Hiera: $variable is not an hash or array when accessing it

- by txworking

I wrote a puppet module and the content of init.pp was: class install( $common_instanceconfig = hiera_hash('common_instanceconfig'), $common_instances = hiera('common_instances') ) { define instances { common { $title: name => $title, path => $common_instanceconfig[$title]['path'], version => $common_instanceconfig[$title]['version'], files => $common_instanceconfig[$title]['files'], pre => $common_instanceconfig[$title]['pre'], after => $common_instanceconfig[$title]['after'], properties => $common_instanceconfig[$title]['properties'], require => $common_instanceconfig[$title]['require'] , } } instances {$common_instances:} } And the hieradata file was: classes: - install common_instances: - common_instance_1 - common_instance_2 common_instanceconfig: common_instance_1 path : '/opt/common_instance_1' version : 1.0 files : software-1.bin pre : pre_install.sh after : after_install.sh properties: "properties" common_instance_2: path : '/opt/common_instance_2' version : 2.0 files : software-2.bin pre : pre_install.sh after : after_install.sh properties: "properties" I always got a error message When puppet agent run Error: common_instanceconfig String is not an hash or array when accessing it with common_instance_1 at /etc/puppet/modules/install/manifests/init.pp:16 on node puppet.agent1.tmp It seems $common_instances can be got correctly, but $commono_instanceconfig always be treated as a string. I used YAML.load_file to load the hieradata file, and got a correct hash object. Can anybody help?

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Powershell: Cannot connect via SSL

- by JSWork

Am following "secrets to powershell remoting" to setup an SLL account and seem to be missing a step. I ran Winrm create winrm/config/Listener?Address=*+Transport=HTTPS @{Hostname="redacted";CertificateThumbprint="redacted"} and got PS WSMan:\localhost> dir wsman:\localhost\listener\Listener_1184937132 WSManConfig: Microsoft.WSMan.Management\WSMan::localhost\Listener\Listener_1184937132 Name Value Type ---- ----- ---- Address * System.String Transport HTTP System.String Port 5985 System.String Hostname System.String Enabled true System.String URLPrefix wsman System.String CertificateThumbprint System.String ListeningOn_756355952 10.0.0.54 System.String ListeningOn_1201550598 127.0.0.1 System.String PS WSMan:\localhost> dir wsman:\localhost\listener\Listener_1187163138 WSManConfig: Microsoft.WSMan.Management\WSMan::localhost\Listener\Listener_1187163138 Name Value Type ---- ----- ---- Address * System.String Transport HTTP System.String Port 80 System.String Hostname System.String Enabled true System.String URLPrefix wsman System.String CertificateThumbprint System.String ListeningOn_756355952 10.0.0.54 System.String ListeningOn_1201550598 127.0.0.1 System.String PS WSMan:\localhost> dir wsman:\localhost\listener\Listener_220862350 WSManConfig: Microsoft.WSMan.Management\WSMan::localhost\Listener\Listener_220862350 Name Value Type ---- ----- ---- Address * System.String Transport HTTPS System.String Port 5986 System.String Hostname redacted System.String Enabled true System.String URLPrefix wsman System.String CertificateThumbprint redacted System.String ListeningOn_756355952 10.0.0.54 System.String ListeningOn_1201550598 127.0.0.1 System.String Trouble is when i do this PS C:\Users\redacted> enter-pssession -Computername redacted -Credential redacted\redacted -UseSSL I get this Enter-PSSession : Connecting to remote server failed with the following error message : The client cannot connect to th e destination specified in the request. Verify that the service on the destination is running and is accepting requests . Consult the logs and documentation for the WS-Management service running on the destination, most commonly IIS or Win RM. If the destination is the WinRM service, run the following command on the destination to analyze and configure the WinRM service: "winrm quickconfig". For more information, see the about_Remote_Troubleshooting Help topic. At line:1 char:16 + enter-pssession <<<< -Computername redacted -Credential redacted\redacted -UseSSL + CategoryInfo : InvalidArgument: (redacted:String) [Enter-PSSession], PSRemotingTransportException + FullyQualifiedErrorId : CreateRemoteRunspaceFailed This happens even when the firewall is off completely and when the machine tires to connect to itself locally. On top of that, despite the listners eing lsited on wsman, when I run PS WSMan:\localhost> Get-PSSessionConfiguration I get Name PSVersion StartupScript Permission ---- --------- ------------- ---------- Microsoft.PowerShell 2.0 PS WSMan:\localhost> Any ideas what I'm missing/doing wrong? edit: Windows 2003. Powershell v2.0

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Connection timed out exception, why?

- by Dheeraj Kumar Aggarwal

I am developing an application which uses embedded tomcat server 7, and deploys a web application on embedded server. My application accesses the embedded webapp through Rest APIs, but my clients are getting Connection Timed Out exceptions and port is also not blocked. I never gets this exception when I install this application on my local machine. Some points: IP address is used in the host name part (They are able to access this IP address on other port) Port is not blocked We are using Apache HttpClient library to access the URL Timeout interval seems not to be an issue. What are the possible reasons for this exception Connection Timed Out? or How can I simulate this problem on my local machine? Any pointers would be helpful.

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ASP.NET via mono on linux?

- by acidzombie24

Has anyone tried running an ASP.NET project via mono on a linux server? Can it be done? was the performance good?

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HTTP Content-type header for cached files

- by Brian

Hello, Using Apache with mod_rewrite, when I load a .css or .js file and view the HTTP headers, the Content-type is only set correctly the first time I load it - subsequent refreshes are missing Content-type altogether and it's creating some problems for me. Specifically, gzip is not compressing these files. I can get around this by appending a random query string value to the end of each filename, eg. http://www.site.com/script.js?12345 However, I don't want to have to do that, since caching is good and all I want is for the Content-type to be present. I've tried using a RewriteRule to force the type but still didn't solve the problem. Any ideas? Thanks, Brian More Details: HTTP headers WITHOUT random query string value: http://localhost/script.js GET /script.js HTTP/1.1 Host: localhost User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 Accept: */* Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive: 115 Connection: keep-alive Referer: http://localhost/ Cookie: PHPSESSID=ke3p35v5qbus24che765p9jni5; If-Modified-Since: Thu, 29 Apr 2010 15:49:56 GMT If-None-Match: "3440e9-119ed-485621404f100" Cache-Control: max-age=0 HTTP/1.1 304 Not Modified Date: Thu, 29 Apr 2010 20:19:44 GMT Server: Apache/2.2.14 (Unix) mod_ssl/2.2.14 OpenSSL/0.9.8l DAV/2 PHP/5.3.1 Connection: Keep-Alive Keep-Alive: timeout=5, max=100 Etag: "3440e9-119ed-485621404f100" Vary: Accept-Encoding X-Pad: avoid browser bug HTTP headers WITH random query string value: http://localhost/script.js?c947344de8278053f6edbb4365550b25 GET /script.js?c947344de8278053f6edbb4365550b25 HTTP/1.1 Host: localhost User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 Accept: */* Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive: 115 Connection: keep-alive Referer: http://localhost/ Cookie: PHPSESSID=ke3p35v5qbus24che765p9jni5; HTTP/1.1 200 OK Date: Thu, 29 Apr 2010 20:14:40 GMT Server: Apache/2.2.14 (Unix) mod_ssl/2.2.14 OpenSSL/0.9.8l DAV/2 PHP/5.3.1 Last-Modified: Thu, 29 Apr 2010 15:49:56 GMT Etag: "3440e9-119ed-485621404f100" Accept-Ranges: bytes Vary: Accept-Encoding Content-Encoding: gzip Content-Length: 24605 Keep-Alive: timeout=5, max=100 Connection: Keep-Alive Content-Type: application/javascript

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Apache2 gettimeofday() keeps CPU at 100%

- by pincoded

I use Ubuntu 6.06.2 LTS with Server version: Apache/2.0.55; built:Aug 16 2010 18:25:39 and PHP 5.1.2 (cli) (built: Sep 16 2010 20:32:18). All my 4 Cores are constantly at 100% and the system begins to accumulate load. A restart for apache fixes the problem temporarily. I made a strace to the pid of the apache processes that keep the CPU busy. I get the following message continuously: gettimeofday({1285234145, 989639}, NULL) = 0 Do you have any ideas where this problem comes from? Thank you. UPDATE: The problem came from an application error that generated an infinite loop. Thank you all for your great help.

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Replacing all disks in a non-OS RAID 5 volume

- by molecule

Hi all, We currently have a server with 8 x HDD slots. It is a HP DL380G5 with a P400 controller. 2 x HDD are in a RAID 1+0 config and this hosts the OS. 6 x HDD are in a RAID 5 config and holds an Oracle DB. Basically the RAID 5 volume is running out of space and we would like to swap all 6 with higher capacity disks. Excuse my ignorance as I am pretty new to this... I believe we will need to backup the data, delete the RAID volume, insert the new disks, recreate the volume, and restore the data. 2 questions: Do we need to worry about the OS partition or is it completely independent so we can simply take out the 6 and insert 6 new disks and get the controller to recognize the 6 new disks and form a new RAID 5 volume? We should not need to reinstall OS or Oracle correct? Since we are going to restore the data on the volume from another source (our vendor will take care of this) but we would like to keep the existing data on the 6 disks just in case we run into issues and want to fall back, is this possible? Thanks in advance.

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Partition is gone after power failure

- by David

Just had a power failure and am just going through my 4 usbdisks to remount them and found that 1 (the most important one) is coming back as 'doesn't contain a valid partition table'. What can I do to try to repair the disk and hopefully retrieve the partition? Lukily I do nightly backups. but would like to get what was there today if possible.

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Transform data to a new structure

- by rAyt

Hi, I've got an Access database from one of our clients and want to import this data into a new MSSQL Server 2008 database structure I designed. It's similar to the Access Database (including all the rows and so on) but I normalized the entire database. Is there any tool (microsoft tools preferred) to map the old database to my new design? thanks

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Install Python 2.6 on Debian Unix

- by Bialecki

I want to install Python 2.6, but as it's still experimental for Debian Unix, I'm wondering what might best course of action is. Is the right idea to idea it into /usr/local for my system and then update the python sym link in /usr/bin to point to that version? Other considerations or ways to do it I should be thinking about?

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What are the Sysadmin-Related Blogs & Mailing Lists you monitor?

- by Tom Ritter

I know this is a gimme question, but I genuinely would like to add more sysadmin related feeds to my reader, so please list the contents of your feedreader.

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Pointing Domain to VDS Directory

- by Jonathan Sampson

I've got a domain name that is managed through 000Domains.com. I also have a virtual dedicated server hosted with GoDaddy.com. Within my VDS, I created a folder /mysite and placed all of my website files there. I can test this through the ipaddress of my VDS, but I would now like to point my domain from 000Domains over to my sub-directory hosted on GoDaddy. How do I do this? Do I need to make any specific modifications to my VDS to inform it that one of the directories will be accessible from a domain name? I have access to Simple Control Panel, if that is of any relevance.

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Multihomed Windows server and DNS resolution

- by mpkilroy

I have a Windows 2008 server with two IP addresses assigned to a single NIC. The DNS settings are setup to register the connections's addresses on the DNS server. nslookup shows both IP addresses for the server name. How is name resolution done in this case, i.e. which IP address does the DNS server return for a host lookup? Or does it return both, and the client selects one of the addresses?

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Why is the latency on one LVM volume consistently higher?

- by David Schmitt

I've got a server with LVM over RAID1. One of the volumes has a consistently higher IO latency (as measured by the diskstats_latency munin plugin) than the other volumes from the same group. As you can see, the dark orange /root volume has consistently high IO latency. Actually ten times the average latency of the physical devices. It also has the highest Min and Max values. My main concern are not the peaks, which occur under high load, but the constant load on (semi-)idle. The server is running Debian Squeeze with the VServer kernel and has four VServer containers and one KVM guest. I'm looking for ways to fix - or at least understand - this situation. Here're some parts of the system configuration: root@kvmhost2:~# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/system--host-root 19G 3.8G 14G 22% / tmpfs 16G 0 16G 0% /lib/init/rw udev 16G 224K 16G 1% /dev tmpfs 16G 0 16G 0% /dev/shm /dev/md0 942M 37M 858M 5% /boot /dev/mapper/system--host-isos 28G 19G 8.1G 70% /srv/isos /dev/mapper/system--host-vs_a 30G 23G 6.0G 79% /var/lib/vservers/a /dev/mapper/system--host-vs_b 5.0G 594M 4.1G 13% /var/lib/vservers/b /dev/mapper/system--host-vs_c 5.0G 555M 4.2G 12% /var/lib/vservers/c /dev/loop0 4.4G 4.4G 0 100% /media/debian-6.0.0-amd64-DVD-1 /dev/loop1 4.4G 4.4G 0 100% /media/debian-6.0.0-i386-DVD-1 /dev/mapper/system--host-vs_d 74G 55G 16G 78% /var/lib/vservers/d root@kvmhost2:~# cat /proc/mounts rootfs / rootfs rw 0 0 none /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0 none /proc proc rw,nosuid,nodev,noexec,relatime 0 0 none /dev devtmpfs rw,relatime,size=16500836k,nr_inodes=4125209,mode=755 0 0 none /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0 /dev/mapper/system--host-root / ext3 rw,relatime,errors=remount-ro,data=ordered 0 0 tmpfs /lib/init/rw tmpfs rw,nosuid,relatime,mode=755 0 0 tmpfs /dev/shm tmpfs rw,nosuid,nodev,relatime 0 0 fusectl /sys/fs/fuse/connections fusectl rw,relatime 0 0 /dev/md0 /boot ext3 rw,sync,relatime,errors=continue,data=ordered 0 0 /dev/mapper/system--host-isos /srv/isos ext3 rw,relatime,errors=continue,data=ordered 0 0 /dev/mapper/system--host-vs_a /var/lib/vservers/a ext3 rw,relatime,errors=continue,data=ordered 0 0 /dev/mapper/system--host-vs_b /var/lib/vservers/b ext3 rw,relatime,errors=continue,data=ordered 0 0 /dev/mapper/system--host-vs_c /var/lib/vservers/c ext3 rw,relatime,errors=continue,data=ordered 0 0 /dev/loop0 /media/debian-6.0.0-amd64-DVD-1 iso9660 ro,relatime 0 0 /dev/loop1 /media/debian-6.0.0-i386-DVD-1 iso9660 ro,relatime 0 0 /dev/mapper/system--host-vs_d /var/lib/vservers/d ext3 rw,relatime,errors=continue,data=ordered 0 0 root@kvmhost2:~# cat /proc/mdstat Personalities : [raid1] md1 : active raid1 sda2[0] sdb2[1] 975779968 blocks [2/2] [UU] md0 : active raid1 sda1[0] sdb1[1] 979840 blocks [2/2] [UU] unused devices: <none> root@kvmhost2:~# iostat -x Linux 2.6.32-5-vserver-amd64 (kvmhost2) 06/28/2012 _x86_64_ (8 CPU) avg-cpu: %user %nice %system %iowait %steal %idle 3.09 0.14 2.92 1.51 0.00 92.35 Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util sda 23.25 161.12 7.46 37.90 855.27 1596.62 54.05 0.13 2.80 1.76 8.00 sdb 22.82 161.36 7.36 37.66 850.29 1596.62 54.35 0.54 12.01 1.80 8.09 md0 0.00 0.00 0.00 0.00 0.14 0.02 38.44 0.00 0.00 0.00 0.00 md1 0.00 0.00 53.55 198.16 768.01 1585.25 9.35 0.00 0.00 0.00 0.00 dm-0 0.00 0.00 0.48 20.21 16.70 161.71 8.62 0.26 12.72 0.77 1.60 dm-1 0.00 0.00 3.62 10.03 28.94 80.21 8.00 0.19 13.68 1.59 2.17 dm-2 0.00 0.00 0.00 0.00 0.00 0.00 9.17 0.00 9.64 6.42 0.00 dm-3 0.00 0.00 6.73 0.41 53.87 3.28 8.00 0.02 3.44 0.12 0.09 dm-4 0.00 0.00 17.45 18.18 139.57 145.47 8.00 0.42 11.81 0.76 2.69 dm-5 0.00 0.00 2.50 46.38 120.50 371.07 10.06 0.69 14.20 0.46 2.26 dm-6 0.00 0.00 0.02 0.10 0.67 0.81 12.53 0.01 75.53 18.58 0.22 dm-7 0.00 0.00 0.00 0.00 0.00 0.00 7.99 0.00 11.24 9.45 0.00 dm-8 0.00 0.00 22.69 102.76 407.25 822.09 9.80 0.97 7.71 0.39 4.95 dm-9 0.00 0.00 0.06 0.08 0.50 0.62 8.00 0.07 481.23 11.72 0.16 root@kvmhost2:~# ls -l /dev/mapper/ total 0 crw------- 1 root root 10, 59 May 11 11:19 control lrwxrwxrwx 1 root root 7 Jun 5 15:08 system--host-kvm1 -> ../dm-4 lrwxrwxrwx 1 root root 7 Jun 5 15:08 system--host-kvm2 -> ../dm-3 lrwxrwxrwx 1 root root 7 Jun 5 15:06 system--host-isos -> ../dm-2 lrwxrwxrwx 1 root root 7 May 11 11:19 system--host-root -> ../dm-0 lrwxrwxrwx 1 root root 7 Jun 5 15:06 system--host-swap -> ../dm-9 lrwxrwxrwx 1 root root 7 Jun 5 15:06 system--host-vs_d -> ../dm-8 lrwxrwxrwx 1 root root 7 Jun 5 15:06 system--host-vs_b -> ../dm-6 lrwxrwxrwx 1 root root 7 Jun 5 15:06 system--host-vs_c -> ../dm-7 lrwxrwxrwx 1 root root 7 Jun 5 15:06 system--host-vs_a -> ../dm-5 lrwxrwxrwx 1 root root 7 Jun 5 15:08 system--host-kvm3 -> ../dm-1 root@kvmhost2:~#

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Outlook 2007 GAL Phone List

- by s15199d

I just spent a lot of time populating Phone Numbers and Fax Numbers in our GAL/Active Directory. The goal of which was to replace our static *.xlsx file that we use as a corporate phone directory. I know I can see the GAL by clicking on the To... button, and I can see more specific info for a particular user, by adding them as a recipient and double-clicking their name in the To: field. Is there any way (inside Outlook) to have a laundry-list view of all users and phone/fax/mobile/address similar to the phone list view for contacts? Are there any other tools that might provide this functionality. I've used a GAL web interface before, but that cost $ and as I recall was challenging to manage.

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PC won't PXE boot to WDS/MDT with Dell Optiplex 755

- by Moman10

I am trying to set up a basic MDT solution. I have set one up in the past at a previous job and it worked flawlessly, however here I'm running into a problem and am having no luck getting around it. I've installed Windows Server 2012 and MDT 2013, along with adding on the WDS role. I haven't configured much outside of the defaults for WDS, basically just set PXE response to respond to all clients (and unchecked admin approval). This machine does not run a DHCP server. I looked on the DHCP scope of our DHCP server, it shows options 66/67 checked and the server name of the WDS server is in there as well. I didn't add this but I assume it was put on during the install process (I believe I had to manually make some adjustments at my old job for this). The PC I have is a Dell Optiplex 755. I have enabled the onbard NIC w/PXE boot option in BIOS and attempted to boot. I get a "TFTP...." error but nothing offering out a DHCP address like I'm used to. In my previous job it pretty much worked right out of the box. I've verified that PortFast is enabled on the port and I've tried a couple different PCs (but both are the same model, only model I have to work with). No matter what, I get the same error. The subnet the PC is in is a different subnet than where the WDS server is sitting, but there are IP helper statements on the switch and the PCs can get regular DHCP addresses just fine from the DHCP server, just doesn't seem to get offered out a PXE boot option. I don't know if the problem is a configuration with the server or the PC itself...but after a few days of Googling I'm running out of ideas. Does anyone have a good idea of something it may be?

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Cannot install git-core using macports

- by robUK

Hello, Snow Leopard 10.6.4 mac ports 1.9.1 I have just installed macports and I want to install git-core. However, I get the following errors: ---> Computing dependencies for git-core ---> Dependencies to be installed: python26 db46 gdbm readline sqlite3 rsync popt ---> Building db46 Error: Target org.macports.build returned: shell command failed Log for db46 is at: /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_ports_databases_db46/main.log Error: The following dependencies failed to build: python26 db46 gdbm readline sqlite3 rsync popt Error: Status 1 encountered during processing. To report a bug, see <http://guide.macports.org/#project.tickets> I have tried doing a port selfupdate and a port clean all and then trying to install again. But still get the same problem. I have also tried install the dependent db46 on its own. Here is the log message: :error:build Target org.macports.build returned: shell command failed :debug:build Backtrace: shell command failed while executing "command_exec build" (procedure "portbuild::build_main" line 8) invoked from within "$procedure $targetname" :info:build Warning: the following items did not execute (for db46): org.macports.activate org.macports.build org.macports.destroot org.macports.install This is my first time using mac ports. Many thanks for any suggestions.

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How can I use fetchmail (or another email grabber) with OSX keychain for authentication?

- by bias

Every fetchmail tutorial I've read says putting your email account password clear-text in a config file is safe. However, I prefer security through layers (since, if my terminal is up and someone suspecting such email foolery slides over and simply types "grep -i pass ~/.*" then, oops, all my base are belong to them!). Now, with msmtp (as opposed to sendmail) I can authenticate using the OSX keychain. Is there an email 'grabber' that lets me use Keychains (or at least, that lets me MD5 the password)?

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Setting up a VPN on Windows Server 2003

- by user28259

Hi! I set up a VPN on my server, everything seems okay but when I connect to it from Mac (didn't try windows) I can connect, I can send data and from the server I see that it receives it but it does not send any data back... Did you ever happened to see this? Thanks a lot!

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How can I unregister a service with dns-sd?

- by Roman

I am trying to use "dns-sd" command line tool on my Windows 7 machine. I can already do something. For example I can register a service using "dns-sd -R ...". I also can browser (see) registered services using "dns-sd -B ...". What I still miss, is how to unregister a service. At the moment when I type "dns-sd -R ..." the dns-sd does not return me to the command prompt. To return to the command prompt I need to press Ctrl-C. And the service stays registered till I press Ctrl-C. What I want is to run "dns-sd -R ..." in the background regime and then I would like to have a possibility to unregister a service from the command line. One more thing which I do not understand yet is what "to look up a service" means. In my picture it should be sufficient to register a service, to see it and then to unregister it. But apparently I need to look up a service. What does it mean and why I need to do it?

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Blacklisting: IP's or domains?

- by johnnietheblack

I am implementing a blacklisting system on my website that monitors contact forms for suspicious usage (both spam content and excessive frequency). When I find somebody / robot that meets my criteria for blacklisting, I want to send them to my DB as a blacklisted entity. My question is, should I blacklist them as an IP or as a domain? As far as I can see, blacklisting an IP is going to be far more effective, because I allow people to enter their email address in the form, and they can easily just change their domain on a regular basis. However, the downside is that if I blacklist an IP, I could potentially be blacklisting a large group of people who share an IP, when only one person is bad (ie - college campuses, coffee shops, etc). Is there a solution I'm missing?

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Changing startup parameters for MySQL

- by RN

I need to remove skip-networking from MySQL startup parameters I am running MySQL on Linux on Centos on a VPS Can someone please tell a newbie how to do this ? I suppose to start and stop the mySQL server, I have to do something like this /etc/init.d/mysqld stop /etc/init.d/mysqld start ps -ef|grep 'mysql' root 11331 20220 0 10:53 pts/0 00:00:00 grep mysql root 32452 1 0 Apr02 ? 00:00:00 /bin/sh /usr/bin/mysqld_safe --skip-grant-tables --skip-networking mysql 32504 32452 0 Apr02 ? 00:00:18 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --user=mysql --pid-file=/var/run/mysqld/mysqld.pid --skip-external-locking --socket=/var/lib/mysql/mysql.sock --skip-grant-tables --skip-networking

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What is 'FizzBuzz' for system administrators?

- by docgnome

FizzBuzz is a simple test of programing ability, often used by employers to weed out people who can't actually program. Is there an equivalent test for system administrators and general IT guys? Clarification I'm looking for things that can be tested in an interview setting with some accuracy. Obviously, this isn't going to clearly determine the right person, just as FizzBuzz doesn't for programmers. I'm just looking to weed out people who think they can work as a system administrator/IT Person because they can surf the web.

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