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IN this tutorial I’ll show you how you can easily clear ram cache and swap memory to speed up the Linux server. You all are familiar with word CACHE which usually represents performance benefits like cache can improve website’s loading speed and similarly cache will improve Linux server performance too in some places. Normally cache are managed by Linux Kernel efficiently and will be cleaned overtime when not in use. Cache cleaning is necessary to refresh and free up the system memory so a new version of cache can be built by eliminating old cache. In result it will help your Server to run even faster with fresh cache. Let’s get started with the tutorial : …

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leisegang replied February 16Feb 16

In this tutorial we’ll check if SMTP port 25 is open for email sending out via Telnet on your Linux machine. Today most of the cloud provider disable the SMTP port 25 to prevent spamming issues. Remember Port 25 is needed to send emails out if it is closed you can’t send email out of the server via any ports despite it is open for you. Here are the steps to check the SMTP port: Open the Terminal or ssh on your server. Type the following command to install telnet if it’s not already installed: For centos/EL :- yum install telnet or for ubuntu/debian :- apt install telnet Type the following command and press Enter: telnet server.alph…

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leisegang replied February 16Feb 16

SSH keys provide a more secure way of logging in compared to using a password alone. While a password can eventually be cracked with a brute-force attack, SSH keys are nearly impossible to decipher by brute force alone. With public key authentication, every computer has (i) a public and (ii) a private “key” (two mathematically-linked algorithms that are effectively impossible to crack). Setup SSH Keys on your Windows computer/laptop using PuttyGEN Step 1 Download PuttyGEN from the Homepage website. Scroll down until you find puttygen.exe and download either 32 or 64bit version. Step 2 Start PuttyGEN by double clicking on its icon Step 3 From top m…

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EdwardPaymn replied February 9Feb 9

CSF (ConfigServer Security & Firewall) is a popular firewall and security tool for Linux servers. CSF is full featured firewall which contains many features and works on Linux out of the box. Its a Stateful Packet Inspection (SPI) firewall, Login/Intrusion Detection and Security application for Linux servers. Here are some common commands that you can use with CSF: Start CSF: To start CSF, use the following command: csf -s you can also use systemctl to restart csf and lfd server systemctl start csf lfd Stop CSF: To stop CSF, use the following command: csf -x you can also use systemctl to restart csf and lfd server syst…

systemctl is a command-line tool used to manage and control the systemd system and service manager in various Linux distributions. It enables administrators to manage the OS and control the status of services. Further, systemctl is useful for troubleshooting and basic performance tuning. Here are some Commands which need admin/root privilege service_name is the name of the service you want to perform the action for. Start a service: To start a service, use the following command: systemctl start service_name Stop a service: To stop a service, use the following command: systemctl stop service_name Restart a service: To restart…

In this tutorial we'll learn how you can disable dangerous PHP functions. Disabling dangerous PHP functions can help improve the security of your web application by preventing potential exploits and attacks. However, it's important to be cautious when disabling functions, as it may impact the functionality of your application. Only disable functions that are truly unnecessary and represent a significant security risk. Here are some steps you can take to disable dangerous PHP functions: Use PHP Configuration (php.ini): Many PHP functions can be disabled or restricted through the PHP configuration file (php.ini). Access to this file is usually restricted to server admi…

In this tutorial we’ll test and check the server network connection speed via speedtest-cli (Speedtest by Ookla), the best thing is you can directly install the speedtest python package to your Linux distro and run the test via terminal command isn’t is awesome. This will also help you to determine that what exactly network speed your server provider is providing. Without waiting lets get started. Difficulty level : super easy For Centos/EL 7/centos 8 stream/centos 9 stream curl -s https://packagecloud.io/install/repositories/ookla/speedtest-cli/script.rpm.sh | sudo bash yum install speedtest to run the speedtest type below command : speedtest **acc…

In this tutorial we’ll learn how to install MSSQL express server in centos/EL 7/8 stream OS easily. Microsoft SQL Server Express is a version of Microsoft’s SQL Server relational database management system that is free to download, distribute and use. It comprises a database specifically targeted for embedded and smaller-scale applications. To install MSSQL express edition follow the below steps : First install some dependencies :- yum install python2 compat-openssl10 openssl-devel Second make python 2 default alternative interpreter : alternatives --config python Third Microsoft MSSQL repo : For Centos 7/EL7 : curl -o /etc/yum.repos.d/mssql-…

Maldet is a malware scanner for Linux servers. It detects varieties of infections and malwares within your scripts (php and etc) and in server. To scan for viruses with Maldet, follow these steps: Log in to your Linux server as the root user. Install Maldet by running the following command: wget http://www.rfxn.com/downloads/maldetect-current.tar.gz tar -xzf maldetect-current.tar.gz cd maldetect-*/ sh install.sh Update Maldet with the latest malware definitions by running the following command: maldet -u To scan a specific directory, run the following command: maldet -a /path/to/directory Replace “/path/to/directory” with the path to t…

In this tutorial we’ll install WDDX php extension in php 7.4. This extension is DEPRECATED and REMOVED as of PHP 7.4. Lets find what is WDDX ? – WDDX (Web Distributed Data eXchange) is a programming language-, platform- and transport-neutral data interchange mechanism designed to pass data between different environments and different computers. No worry we can still install WDDX extension in php 7.4 follow this easy guide to this :Step 1 : Building and installing WDDX php extension : Step 1 : wget https://github.com/php/pecl-text-wddx/archive/master.zip -O wddx.zip unzip wddx.zip cd pecl-text-wddx-master phpize ./configure make make install …

This topic is about the mail sending from different dedicated/static IP in CWP Postfix and Linux server using postfix MTA. Suppose you've two or more dedicated static IP and you want to host websites in One Ip and use the second Ip to send Emails only for this you need to make changes to Postfix config like Below : Step 1 : Edit postfix master config /etc/postfix/master.conf : nano /etc/postfix/master.conf Step 2 : Find this lines and add this config : and and below this two lines add this config : -o smtp_bind_address=124.12.12.12 replace the ip with your second IP or the Ip you want to send email from so the conf…

in this tutorial I’ll show you how you can assign user account ip for mail sending under postfix mail server. It will be good if you’re providing mail services to your use. Suppose you’ve one ip configured for mail server and a user who sends lots of spam or his/her website got infected and sending spam from the infected scripts this leads to main mail ip for email sending will quickly get into blacklisted and all other genuine users who are using safe practices for mail sending will suffer because of that bad user. To cope with this situation you need to have per ip basis configuration for user if one user ip get blacklisted then other users will not be affected and…

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torettos replied June 22, 20231 yr

Now a days who doesn’t want speedy websites, for this you need a good server configuration whether it is VPS or dedicated server all servers have DISK attached to hold your website’s files and data and the Disk I/O (Input/Output) is one of the main requirement for speedy websites i.e. how quickly server can read and write data to it. Most server provider now a days provides SSD or SSD cached disk space even some provider also dealing with old magnetic HDD Disk to there clients which can hold data of 100-500 GBs (even TBs), hold on is that worth it? In this article we’ll check DISK I/O speed of your server (VPS/Dedicated) via this simple commands. Command…

In this tutorial we’ll learn how to install open source openvpn on linux server and run your own VPN server. This is OpenVPN script installer for Debian, Ubuntu, Fedora, CentOS and Arch Linux. This script will let you setup your own VPN server in just a few minutes. OpenVPN provides flexible VPN solutions to secure your data communications, whether it’s for Internet privacy, remote access for employees, securing IoT, or for networking Cloud data centers. OpenVPN Server software solution can be deployed on-premises using standard servers or virtual server, or on the cloud server. Why Use Our VPN? Uses the public Internet to create an economical, isolated,…

This is short tutorial for clearing and deleting the mail queue from command line. Postfix is the mail server which is used to send mails, time to time there will increase in mail queue which contains failed email in order to check and clear the mail queue just run this following command from terminal/ssh. To check mail queue: mailq To remove all mail from the queue: postsuper -d ALL To remove all mails in the deferred queue: postsuper -d ALL deferred EXTRA : To delete or remove maildrop queues run this command : find /var/spool/postfix/maildrop/ -type f | xargs rm -rf SCRIPT : Also you can use this script to delete mail que…

In this tutorial we’ll install latest version of FFmpeg 6.0 "Von Neumann", in Centos/linux/ubuntu/debian server also it will work in CWP, Cpanel and ispconfig and other centos supported control panel. I’ve gotten many requests and mails upon how to install ffmpeg and here is the guide. FFmpeg is the leading multimedia framework, able to decode, encode, transcode, mux, demux, stream, filter and play pretty much anything that humans and machines have created. It supports the most obscure ancient formats up to the cutting edge. Its pretty simple to Install Latest version of FFMPEG Just follow this steps : Ensure you’re running kernel 3.2.x and above. Check ker…

Install composer quickly and learn how to update composer and use different php version paths with composer, Composer is a tool for dependency management in PHP. It allows you to declare the libraries your project depends on and it will manage (install/update) them for you. Composer can be installed in your server quickly and its very easy to install :- Installation of Composer Switch into the /usr/local/bin directory. cd /usr/local/bin Download and installing Stable version of Composer by using cURL : curl https://getcomposer.org/composer-stable.phar -o composer Fix the permission also this will create global access to composer i.e. user hav…

In this tutorial I’ll show you how you can upgrade PostgreSQL from older version to latest version at the time of writing 13 is the latest version, This is tested in CWP and other servers running centos 7 and 8 i.e. el7/el8. The upgrade procedure is little bit complicated and you need to follow the below steps one by one : Step 1 : Backup all the data mkdir /home/pgsql chown -R postgres:postgres /home/pgsql su - postgres pg_dumpall > /home/pgsql/backup exit Step 2 : Uninstalling/removing the current version of PostgreSQL : systemctl stop postgresql mv /var/lib/pgsql/data/ /home/pgsql/data.old rpm -e --nodeps postgresql postgresql-devel p…

In this Topic we’re going to add Swap space to Linux OS (RHEL, CentOS, Ubuntu) to prevent memory full issues. Swap is important when your server frequently going out of memory and got hanged (OOM) this can cause MySQL database corruption and many issues with the server. Before we get started I like to inform that this tutorial is only valid for KVM/XEN/VMWARE/Dedicated type servers. For Openvz and other container based servers this tutorial will not work. Swap space in Linux is used when the amount of physical memory (RAM) is full. If the system needs more memory resources and the RAM is full, inactive pages in memory are moved to the swap space. While swap space can…

In this tutorial we’ll learn how to find big files in Linux, you can use the find command with the du command to search for the files. Here’s how to do it: Open a terminal/ssh window. Navigate to the directory where you want to search for big files. For example, to search for big files in your server root / directory, type: cd / Type the following command to list all files in the current directory and its subdirectories, sorted by size: du -ah . | sort -rh | head -n 30 This command uses the du command to calculate the size of each file and the sort command to sort the results in reverse order. The head command is used to show only the first 30 …