How To Troubleshoot A Linux VPS With CPanel

Nov 20, 2007

I'm having some problems with my new VPS server. The server is running under Linux with Plesk (sorry type error on the title, it's not CPanel but Plesk instead).

The server is working fine most of the time, however, once every one or two weeks, the server can be extremely slow or completely down. The only thing that I can do the solve the problem is to restart the server. Once the server is restarted, everything is back to normal. There's once, I couldn't even go to the control panel, the server restarted by itself after 45 minutes later.

I tried contacted the server administrator, they said they couldn't do any debugging for me since I have restarted the server. Their response is very slow, I couldn't wait for a few hours just to let them troubleshoot. And since this is unmanaged VPS, they seems to be reluctant to teach me on how to troubleshoot it. They just asked me whether I had done some troubleshooting whether it's a DDOS attack or just some optimization is required for the server. They are asking back the question to me! Due to some reasons, we can afford a downtime of more than half a day to switch the server, so meantime, I have to learn on troubleshooting the problem myself.

So, I will like to know if similar things happened, what should I do? Can I use Plesk to check? Or I need to login using SSH to check the server?

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Various Questions: Which Cpanel Tree To Run - When To Update - How To Troubleshoot..

Nov 20, 2007

I have a VPS with 1152mb of RAM.

I don't resell, I am using the VPS for personal use to run a small vBulletin board (30-60 members on at a time), a Mambo site that is used to aggregate news (12,000 or so news items), and then a couple small personal static sites, and about 25 email addresses.

My VPS has the following versions listed in WHM:

WHM 11.11.0 cPanel 11.15.0-R17853
CENTOS Enterprise 4.5 i686 on virtuozzo - WHM X v3.1

It is currently setup with the default update settings that came when set it up, which are:

cPanel/WHM Updates = Manual Updates Only (STABLE tree)
cPanel Package Updates = Automatic
Security Package Updates = Automatic

Question 1:
So, for the type of site I am running, is the stable tree the best? While it is a small vBulletin community, lack of down time is my main goal, so I need to balance getting updates fast enough to keep it secure, but not getting 'bleeding edge' bugs introduced. Which tree is the best balance?

Question 2:
Should I be running automatic updats on cPanel/WHM or keep it manual and check here and other forums for important updates?

Question 3:
I recently had a problem where Horde stopped working.'s support staff helped me, and suggested two things to attempt to fix it, and this "/scripts/fullhordereset" fixed it. So, since I am new to VPS's and more specifically, working with Linux, how to I learn/research things like this in the future. Should I be checking out forums/communities for each individual app (like Horde), or is there a better option?

Question 4:
Unfortunately, I don't know what I don't know. Such as what tree to run, when to do cPanel updates, when to do Apache updates, how to make sure all my configs are right. Any suggestions on how to both make sure my WHM is configured the best way for my purposes, and more importantly, what is the best way of moving from WHM

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How To Troubleshoot Unexplained Reboot?

Dec 7, 2008

I have a Centos 5.2 box with Cpanel/WHM. A couple days ago it rebooted.

I checked /var/log/messages and I can see where it rebooted, but I can't find anything that indicates why.

I'm trying to figure out if this is a hardware issue or software issue/crash.

I do have Nagios istalled, and it seems it saved some data right before the server rebooted. Not sure if this is a simple coincidence.

Dec 4 11:53:35 miles nagios: Auto-save of retention data completed successfully.
Dec 4 11:56:14 miles syslogd 1.4.1: restart.
Dec 4 11:56:14 miles kernel: klogd 1.4.1, log source = /proc/kmsg started.
Dec 4 11:56:14 miles kernel: Linux version 2.6.18-92.1.17.el5PAE ( (gcc version 4.1.2 20071124 (Red Hat 4.1.2-42)) #1 SMP Tue Nov 4 14:17:52 EST 2008
Dec 4 11:56:14 miles kernel: BIOS-provided physical RAM map:
Dec 4 11:56:14 miles kernel: BIOS-e820: 0000000000000000 - 000000000009f000 (usable)

how to trouble shoot this?

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How To Troubleshoot Mmap Cache Problems

Jun 24, 2008

Could someone please help me with some information on how I can troubleshoot this issue?

[warn-phpd] mmap cache can't open /home/sitedir/)

It's happening on all the directories ie: sites on the server. Switching from phpsuexe back to running php dso fixes the issue, but how can I run phpsuexec and fix this problem? Any tips would be very much appreciated.

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Linux VPS With CPanel

Jul 26, 2007

What VPS providers do you recommend me?

I need a Linux VPS with cPanel and modest allocated resources (like 10-30GB bandwith, 5-10GB disk space).

Provider must be VERY reliable.

Budget $35/mo all included with Paypal.

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Coldfusion And Linux/cpanel

Apr 4, 2008

my dad hired someone to build a web site for one of his clients and the guy used codfusion for the forms. I should have just built the site myself, but time is money and I have little time. So, is it possible to install coldfusion on a linux server RHEL3 with cpanel? I've got 3 other dedicated servers as well without cpanel that are running centos.

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Cpanel And Linux OS Choice

Apr 28, 2008

For one of my server, I have to use cpanel, my host offers these possibilities:

CentOS Linux
Fedora Core Linux
Debian Linux
Gentoo Linux
RedHat Enterprise Linux

In term of compatibility and evolution, what is the best choice OS/Cpanel?

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Best Dedi Server Mgt Co For Linux, CPanel?

Aug 13, 2008

We are just porting our site over to SoftLayer running linux, cPanel and two Raids (one for DB and one for OS).

What companies would you recommend for Dedicated Server Management?

We would also want this server management company to move the website and provide a suitable level of security going forward.

We do not have the people to manage the server (it is only a few of us plus application programmers). It is just that we need to keep costs reasonable. I do not want to pay more than $100 per month and would like to pay less.

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Cpanel Linux Email Breach

Apr 18, 2008

I dont know how but the passwords keeps getting changed on the emails on my cpanel. Its no one who has acess and no files are being delted to the problem is only with the email.

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Coldfusion MX 7 On Linux + CPanel Server

Aug 22, 2007

Some of our customers needs Coldfusion MX 7 on a RedHat Enterprise 4 Linux Server that comes with cPanel. At [url]I can see there is support for RHES 4, but will it cause any conflict to install this app in the same server that cPanel is installed?

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Linux/cPanel Blank Screen

Sep 25, 2007

I have a server that crash at random time intervals. Mostly it crashes in between 7 days. The console is just chowing a blank screen.

The specs of the system are:
Linux Distro: CentOS 4.5, kernel 2.6.9-55.0.6.ELsmp (tried multiple kernels).
Control Panel: cPanel 11.x
Hardware Info:Tyan server barebone - GT20 B5350G20S4H
dual processor intel xeon
4 x 250 GB Western Digital WD2500JS-00 Hard Disks
ARECA-1110 4xSATAII PCI-X Raid controller.

I tried everything on the software part. Update the kernel, keep system software up to date. Nothing workerd.
The load is just normal and memory usage is only 1GB out of 4GB.
There are no entries in the log files witch are pointing to an error.

Everything is leading to an hardware issue. I suspect the raid controller or memory. The power supply is not an problem I think because the server consumes still power when it has a blank screen.

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How To Install ASSP On Linux System Without Cpanel?

May 28, 2008

How to install ASSP on linux system without cpanel.

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Dec 31, 2008

when cPanel for Windows is launched, would you eventually switch to Windows or stick with Linux?

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Apr 4, 2008

Does anyone know if it is possible to implement DKIM (DomainKeys Identified Mail) on a Linux server that uses cPanel/Exim? I am interested in getting this implemented but not sure how, or if it's even possible yet on my setup.

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Advanced Securing & Hardening Of Linux Server -cPanel

Oct 29, 2009

We have discussed all the basic methods of securing and hardening the server. Lets leave all the basic and general server securing and hardening I have started this to get advance knowledge in securing and hardening of the server so that it will usefull for all the person So i request all to provide all the vaulable tips and suggestions in advance securing and hardening of linux servers I welcome all the comments related to advance securing and hardening of linux servers.

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Moving A Client From Linux Cpanel To Windows Plesk

Nov 5, 2008

i would like to move few clients from my old linux VPS that runs on Cpanel .. to my new windows VPS tat runs Plesk .. you see there were several attempts by new provider .. they cant guarantee that accounts can be fully migrated even manually they only copied site files to new server .. the client account's still running on linux vps cpanel, they are intact .. clients dont have any php or mysql files they are just plain HTML and Flash files .. i can move site files .. im concerned about mail accounts and emails that already in my clients inbox (they are using IMAP accounts) .. do you guys know any guideline or step by step how to migrate my clients

P.S. please consider me as an uneducated person .. my background is designing not programming or network administration.

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Plesk 12.x / Linux :: Migrate Hosting From CPanel With Error?

Jul 9, 2014

I have migrate Hosting from Cpanel to Plesk, but mailbox not create successful.

mbox_quota 262144000 -forwarding false -ignore-nonexistent-options failed with return code 1.
Stderr is

Unable to set the mailbox size limit for the domain: The size of this mailbox must not exceed the limit on amount of disk space allocated for mailboxes in this domain.

Default mailbox of Cpanel is 250MB.

How to change default mailbox size to 250MB to change mail from Cpanel to Plesk.

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Plesk 12.x / Linux :: Accounts Migration Error (from CPanel)

Oct 15, 2014

I'm getting following errors while migrating my accounts from latest version of cPanel:


Couldn't get 'cgi_bin_mode' attribute for domain where cgi-bin dir is '' and docroot dir is '/home/inofash/public_html'. Domain will be migrated in that way as if its cgi-bin directory was located under docroot.

Because of that none of my accounts can't be migrated.

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Plesk 12.x / Linux :: Migrating From Cpanel Not All Files Migrated

Apr 14, 2015

I currently run the PMM tool, it migrates and created all the domains for me, but I have a new problem. Some clients does not have their files only at public_html, they use the root at their cpanel accounts, I notice that the PMM did not migrated the files from the root.... Is there any option to it be done?

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Plesk 12.x / Linux :: Domain Migration From CPanel 11.42 - PHP Fatal Error

Sep 5, 2014

I trying to migrate a domain from cpanel 11.42 to my new plesk 12 vps.

When i do this i got a error:

PHP Fatal error: Call to a member function getElementsByTagName() on a non-object in /usr/local/psa/admin/plib/backup/Conflicts/Detector.php on line 536

The domain has 3 sub domains, 1 parked domain and several mailboxes.

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Plesk 12.x / Linux :: CPanel Migration Tool Does Not Migrate Multiple Forwards

Oct 24, 2014

We recently started migrating some cPanel accounts to Plesk. Besides the obvious that it doesn't create customer accounts it contains a pretty frustrating bug:

When an mail forward in cPanel has multiple addresses, only one the first mail forward address is migrated to Plesk.

so, E.g.
on cPanel: is forwarded to,,

after migration to Plesk: is forwarded to only. The other addresses are not migrated.

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Plesk 11.x / Linux :: Access To CPanel - 502 Bad Gateway Error Nginx On Multiple Domain

Feb 18, 2015

Our server : [URL] .....
plesk v11 (64BITS)


We found 502 Bad Gateway error Nginx on multiple domain "currently is a wordpress site e-commerce" and also ecommerce wordpress, possibly to fix this problem we have followed this tutorial " [URL] ....

we perform the following operations:

sudo apt-get remove php5 php5-cgi php5-fpm
sudo apt-get install php5 php5-cgi php5-fpm

Following these operations we lost access to cpanel.

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Best Platform For IMAP Mail (Cpanel, Plesk Linux Or Plesk Windows)

Nov 17, 2008

Best platform for IMAP mail (Cpanel, Plesk Linux or Plesk Windows)

I need to setup 5 email accounts on my domain, each will use IMAP and store messages on server, so total space taken by each account will be 2-5 GB.

I have decided to go with as I'm close to them and ping is fast.

What is the best solution for IMAP and large email accounts: Linux Cpanel, Linux Plesk or Windows Plesk?

Each account will be accessed by 2 people differently by Thunderbird and occasionally by webmail, so nice webmail is a plus.

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CPanel Directory / Sub-Directory Protection (Linux Shared Hosting)

May 31, 2007

I have a situation like this:

There is a directory say, "Master" and inside, "Master" there is sub-directory, "Slave". A user who has access to, "Master" should be able to access, "Slave" automatically. However, a user who has access to, "Slave" should not have access to, "Master". Inside cPanel this type of protection is not possible.

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Plesk 12.x / Linux :: Installing Mcrypt On Linux Centos 5.5 PHP 5.3.3

Jun 20, 2014

I am trying to install Magento on my apache server. I am running into the dreaded mcrypt issue as Magento needs it to run. I have now been googling for the past few hours and have gotten nowhere.

Here are my details:

Centos 5.5
PHP 5.3.3
Plesk 12

I have tried installing all sorts of different repos and it just isn't working.

When I try to install using # yum install php-mcrypt I get the following:

Loaded plugins: fastestmirror
Package php-mysql is obsoleted by php-mysqlnd, trying to install php-mysqlnd-5.5.13-3.el5.remi.x86_64 instead
--> Processing Dependency: php53-gd for package: psa-php53-configurator
--> Processing Dependency: php53-imap for package: psa-php53-configurator


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Feb 25, 2015

Does Parallels support Plesk 12 being installed on a Linux VM that is provisioned on Microsoft Windows Server 2012 R2 Hyper-V?Is it fully supported?

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