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Knowledgebase Articles: CentOS / Ubuntu
Learn to enable SSH for account to perform the basic tasks through the terminal. Follow VPSBlocks to learn in detail. ACCESSING SSH FROM WINDOWS To access your machine using SSH (all Linux variants) we recommend downloading the program 'Putty'. This...
All related questions & answer on installing zPanel for Ubuntu server. A self help guide to solve issues. zPanel is a free alternative to cPanel. It's very easy to setup if you follow the below instructions: 1. Login to your server via SSH (see: https...
Installed Vesta Control Panel and want to modify the config? Learn how to find vesta config file location. If you have installed Vesta Control Panel and want to modify the config such as the php.ini to change the max file upload size, the file locations...
Your VPS may attack against other networks while running open DNS resolver. Follow instructions on resolving problem. PLEASE NOTE: IF YOU ARE ADVISED YOU ARE RUNNING AN OPEN DNS RESOLVER YOU MUST TAKE ACTION AS YOUR VPS IS MOST LIKELY BEING USED IN ATTA...
If there isn't enough memory allocated on a server tasks may hang on the server. Find step by step tips to solve it. Find excellent tutorial on restart on task hang. Know how to setup the server so it restarts if this occurs automatically. Sometimes o...
Change hostname or server name of a Linux system. Learn following step by step tips to do it yourself. To change the hostname on your actual VPS, you need to login via SSH (see: https://www.vpsblocks.com.au/support/Knowledgebase/Article/View/41/0/how-do...
You may have broken grub. Know how to fix grub error 15: file not found issue on CentOS & Ubuntu. If you have updated your system and rebooted it without copying grub.conf to the boot directory, you may have broken grub. To fix this you need to firstl...
Complete tutorials about installing & using free control panel on a VPS. Do it yourself by following VPSBlocks. NOTE: VESTACP IS UNVAILABLE FOR UBUNTU 16.04 AT THE MOMENT. cPanel is great as a complete hosting package. But if you don't need features l...
A complete guide on how to install Memcache on a cPanel/WHM server with root access. Follow step by step tutorial to learn fast. Memcached is a free & open source, high-performance, distributed memory object caching system, generic in nature, but intend...
SLOW access via an IPV6 from a VPS in Australia? Here is the solution to solve slowness accessing through your VPS. Due to the way most operating systems work, IPv6 is preferred before IPv4 when available - however the world isn't fully IPv6 ready even ...
This guide provides instruction to check your server kernel information & upgrade your server to latest kernel. Read & learn. To update the kernel in CentOS, cPanel or Fedora is very simple. However, there are a few tricks to ensure you don't run into t...
Learn the easiest way to manually generate a Certificate Signing Request (CSR) for your SSL certificate. _Please note: This article is for Linux servers NOT running cPanel_ PREREQUISITES What you'll need first is to install OPENSSL on your server, th...
Time drifting when running a Linux guest under VMware ESX server, knows the way to solve time drifting problem easily. THE FINAL WORKING SOLUTION AS OF 27/03/2015: NOTE: THIS METHOD IS NOW DEPRECATED, CORRECT SETTINGS IN GRUB.CONF AND CORRECT NTPD SET...
Step by step tutorial on how to fix the PHP invoked OOM killer error. Read steps to fix yourself. If your linux server does not have enough memory, it may crash due to trying to overcommit memory for application requests. If your server becomes unresp...
Learn how to import a large MySQL database today online. An exceptional online selfhelp tutorial. Learn Step by Step. If you have a large MySQL database you need to import, you cannot import it via PHPMyAdmin as there is a 2MB limit. Upload your datab...
Excellent guidelines on how to resize or expand a tmp partition. Learn step by step to do it yourself. The default tmp folder size for lunix operating systems is often 512mb (including cPanel installations). To check the size of the tmp partition use ...
Learn steps on how to install servers Apache or MySQL through Webmin. An easy tutorial for any new learners. To use Webmin to install various servers and modules: * Go to http://YOURIPADDRESS:10000/ [https://YOURIPADDRESS:10000/] * Accept the cert...
This step by step method will will teach how to inatall redis caching for Wordpress. Follow to learn fast. Our users have reported approximately 30% increase in page loading speed by installing the Redis Caching module for Wordpress. This can easily b...
Know the method to reset your root password from the console. This guide tells how to reset a forgotten root password. Don't know how to reset your root password from the console? Here is the excellent full guidelines to do it yourself. Firstly, you n...
Time drift is a major issue with Linux systems running under virtualisation platforms. To fix this issue follow instructions. Time drift is a major issue with Linux systems running under virtualisation platforms. Using ntpdate to update your clock regul...
Are you running out of space in your up/tmp directory? To fix this you need to change the cache directory that eAccelerator uses. THIS ARTICLE IS FOR THOSE RUNNING EACCELERATOR (COMMON AND RECOMMENDED IN CPANEL FOR FASTER WEBSERVING). YOU MAY FIND YOU A...
Webmin is a web based application that should be access through browser. Learn how to access Webmin following easy steps. Webmin is automatically installed on all Linux variants at https://YOURIPADDRESS:10000/ [https://203.143.82.4:10000/] Go there, a...
Learn how to check free disk space in Linux operating system. An easier way on 'how to' free guidelines for learners. TO FIND YOUR CURRENT DISK SPACE USAGE Login to SSH [https://www.vpsblocks.com.au/support/Knowledgebase/Article/View/41/0/how-do-i-use...
Need a swap partition on your VPS? you should use a file based swap partition. Learn the simple steps & do it yourself USE A FILE AS A SWAP PARTITION If you require a swap partition on your VPS, it's recommended to use a file based swap partition. To a...
Stop hackers attempting to login on wordpress website. A quick guide for self learners on Wordpress security. The WordPress Security tips can protect you against an attack and prevent hackers from continually attempting to login. Wordpress installatio...
Great tutorial available on setting up a webserver using webmin without cPanel. A step by step tutorial for new learners. If you want to host websites and are happy to do without the friendly cPanel interface, there is a great tutorial available here: ...
There is a couple of great guides on installing Asterisk on both CentOS 6 & Ubuntu 12. Follow the tutorial & do yourself. CentOS: http://blogs.digium.com/2012/11/05/how-to-install-asterisk-11-on-centos-6/ [http://blogs.digium.com/2012/11/05/how-to-insta...
This article gives a step by step guide on how you can install HTTP (Apache) and PHP. Follow the tutorial & do yourself. Login via SSH Type the following commands: * install httpd mod_ssl * chkconfig httpd on * yum install php-common php-gd ph...
Find steps on How to mount a disk in Linux on VPSBlocks tutorial. An excellent tutorial guide for self learners. If you have added SATA space to your VPS, the new drive will not be mounted automatically. To add your new SATA hard disk login to SSH [http...
Know the easiest way to install mcrypt in Plesk for Linux. Just follow the steps or visit VPSBlocks Support for your help. If you have Plesk installed and require mcrypt you need to do the following: Login via SSH [https://www.vpsblocks.com.au/support...
Receiving 'Got a packet bigger than max_allowed_packet bytes' error? Follow our instructions to fix such issues. If you receive an error from your MySQL server (or website with mySQL backend) stating 'Got a packet bigger than "max_allowed_packet" bytes'...
After you have ordered an extra IP Address through the cPanel, you will need to assign the new IP to the NIC in VPS. SETTING UP MULTIPLE IPS IN UBUNTU After you have ordered an extra IP Address through the control panel (see http://www.vpsblocks.com.au...
Waiting too longer to log into your VPS with ssh for the session to authenticate? Fix this issue by follow our easy tips. If you are trying to log into your VPS with ssh and found you have to wait much longer than reasonable for the session to authentic...
Cannot write to tmp directory file corruption even if there is space available? Follow step by step to solve such issues. Sometimes particularly if the /tmp directory gets full on your server, the underlying tmpDSK file can get corrupted. If this occurs...
A linux based VPS need to allow iptables to respond to ping requests. Follow instructions to create an iptables rule. If you would like your linux based VPS to respond to ping requests you will need to allow them in iptables. To do this create an iptabl...
Guidelines to determine which IP addresses are hitting your web site the most. A quick learning tutorials for self learners. If your webserver has started to come under increased load and you want to see which IPs have been most actively hitting your we...
NetHogs is a utility which allows you to see what bandwidth each process on your system is using at a given time. * Please note this article contains extracts from: http://www.cyberciti.biz/faq/linux-find-out-what-process-is-using-bandwidth/ [http://www...
Learn to solve issues with MySQL crashing occasionally on your VPS. Follow step by step tutorial to learn and apply. If you are having issues with MySQL crashing occasionally (or frequently) on your VPS, the most likely reason is it is hitting the open ...
Know the all tricks that extend or expand a SATA partition. This method is only valid for Linux systems where you have purchased SATA space. _This article is only valid for Linux systems where you have purchased SATA space, and then increased the SATA s...
The current version of the Vesta control panel supports has gzip compiled into NGinx, however, the gzip types are listed incorrectly. To enable compression for NGinx (which if switched on is serving your website rather than Apache) you need to: 1. SSH [...
Learn what to do if MySql.sock file is missing. A self learning guidelines for any learners. Some programs require mysql.sock to be located at /tmp/mysql.sock However, cPanel setups and some others now put the mysql.sock file into /var/lib/mysql The...
Learn to block a specific country known exploited IPs. Step by step tutorial will help you learn fast and apply. If you want to block a specific country known exploited IPs you can do so quite easily by running the below script on a daily basis in a cro...
Get a benefit to your MySQL performance by using the MySQL Tuner. A complete tutorial on MySQL tuning on linux hosts. MYSQL TUNER Sometimes you can find that default MySQL settings are not ideal for your installations. In most cases you can get a benef...
Here is the instructions that extend a regular ext3 or ext4 partition in your VPS without needing a boot CD. Follow the steps. * Note: Our VPSs generally use LVM and as such as NOT regular ext3/4 partitions. THIS ARTICLE SHOULD NOT BE USED FOR RESIZIN...
Find out what IP address has been hitting your webserver for traffic details. An effective guidelines for self learners. If your server has started getting a lot more traffic and you want to find out what IP address has been hitting your webserver there...
If your partition is GPT it should expand automatically upon ordering your disk upgrade. Know how to expand Linux Partition Note: This article is NOT for expanding SATA space. To expand SATA space please click here [https://www.vpsblocks.com.au/support/...
If you are adding a second NIC in Ubuntu, It requires some reconfiguration of network settings within Ubuntu. If you are adding a second NIC in Ubuntu, it's most likely that it will not automatically pick up the settings properly when you boot up the VP...
If you have forgotten your root password to any of the above operating systems, you will need to boot into single user mode and reset the root password. To do this you need to access the web based console through the portal, see: https://www.vpsblocks.c...
With Ubuntu it's important to know how to set your iptables configuration to work at startup. Know the Ubuntu & Firewall Rules. With Ubuntu it's important to know how to set your iptables configuration to work at startup. To do this first create your ip...
If you have chosen a CentOS distribution of Linux, you can easily install Apache, PHP and MySQL through SSH. If you have chosen a CentOS distribution of Linux (not cPanel as it automatically installs everything), you can easily install Apache, PHP and M...
You may also build ClamAV from sources to benefit from better scanning. Find ste by step tutorial to do it yourself. If you need to scan particular location(s) on your VPS using ClamAV, please use following: 1. logon to the VPS via SSH [https://www.vp...
Get the detail procedure to mount a Windows or cifs share on a Linux account. Visit us to know more! THINGS YOU NEED TO KNOW FIRST: YOUR VPS NAME: E.G. VPS.YOURVPSNAME.COM YOUR USERNAME: E.G. VPSYOURVPS YOUR PASSWORD THE SHARE LOCATION: E.G. //S...
When update your kernel using yum & receive an error that there is no space in/boot, you need to remove old kernels. If you are trying to update your kernel using yum and receive an error that there is no space in /boot then you will need to remove old ...
Read the complete article and know the simple steps to update the kernel in CentOS 7 easily. To update the kernel in CentOS 7 is very simple. Note: This article applies to CentOS 7. Clients with CentOS 6 or cPanel installed should read this article [h...
This article explains how to track down a SPAMming script or breached SMTP account if your server is sending SPAM. Parallels have provided an article with a full explanation of how to track down a SPAMming script or breached SMTP account if your server ...
Check the error log to see why the MySQL server does not start. Visit us to solve the problems. If MySQL won't start, sometimes this can occur due to corruption in tables or in logs. The first thing to try would be a MySQL repair, to do this: 1. Log...
If your server is having difficulty completing boot cycle, determine what service is causing issues by booting interactively. If your server is having difficulty completing the boot cycle, you can determine what service is causing issues by booting inte...
Visit us today and know the easiest way to search for text inside files on Linux. Follow the steps and do it yourself. To search for text inside files on Linux the easiest way is to type: grep -H -r "texttofind" /home/ 2>/dev/null grep : The command...
Know the command to find all files modified in the last 24 hours in a particular specific directory & sub-directories. TO FIND ALL FILES MODIFIED IN THE LAST 24 HOURS (LAST FULL DAY) IN A PARTICULAR SPECIFIC DIRECTORY AND ITS SUB-DIRECTORIES: _find /d...
After successful cloning of existing Linux based VPS, inaccessible SSH may occur. In that case we have to regenerate keys After successful cloning of existing Linux based VPS it may happen of inaccessible SSH. The reason might be old ssh host keys, co...
Finding a file in a Linux system can be difficult if you don't know how. Know the best way by reading this steps. The easiest way to find a file on Linux is to: * SSH to your linux server * Install mlocate (assuming it's not already installed): ...
Know the command to delete an unlimited number of files in the fastest manner. In SSH [https://www.vpsblocks.com.au/support/Knowledgebase/Article/View/41/0/how-do-i-use-ssh] you may find a circumstance where you want to delete more than the allowed numb...
To tar/gzip all PHP files within a folder recursively read the following command and do it yourself. To tar/gzip all PHP files within a folder recursively you would enter the root directory you want to recurse, and issue the following command in SSH to ...
From this article you will learn the simple steps to update the kernel in Debian or Ubuntu. To update the kernel in Debian or Ubuntu is very simple. 1. UPDATE THE KERNEL * Type: apt-get update && apt-get upgrade linux-image linux-headers (note, yo...
TESTED CONFIG FOR UBUNTU 12/14/16 RUNNING UNDER HYPER-V WITH NO TIME DRIFT 1. KERNEL BOOT OPTIONS Ensure that cmdline has no other time/clock related parameters, but only "clock=pit". To check/modify: - open the file /etc/default/grub - find the l...
If you have a DHCP based second NIC on Ubuntu, it will have two gateways. You may find when you reboot the server sometimes it takes the incorrect gateway and makes it default meaning that your system has no internet access. You can find out what the de...
THE ARTICLE COVERS REDHAT BASED OPERATING SYSTEMS OS will have NIC config files as: /etc/sysconfig/network-scripts/ifcfg-ethX where X is the interface number. Typical content of ifcfg-eth0 (usually it is a PUBLIC NIC on the VPS): DEVICE=eth0 BOOT...