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Tutorials

How to Install and Use SSHFS on CentOS 7

SSHFS is a handy tool to share files securely. It is a filesystem based on the SSH File Transfer Protocol. As all Linux servers have already SSH installed, its very easy to configure and can be used to share files between two or more servers or desktops. You just have to mount the file system and it works like a charm. The idea of sshfs was taken from the SSHFS filesystem distributed with LUFS, which I found very useful. In this tutorial we will see how to install SSHFS with from the CentOS repository with the yum command and also how to compile it from Install SSHFS with yum Use the following command to install the SSHFS package with yum: When you installed the package with yum, proceed with the chapter "Mount a remote folder with SSHFS". Install SSHFS from source As an alternative (or when you want to get the latest SSHFS version) you can install SSHFS from source. To install SSHFS from source, you have to download the source files by using the following command which we will download from its official website: Now extract the folder by using the following command: You have to enter the folder with "cd" and then use configure and compile SSHFS: Now let's start using SSHFS as its successfully installed. Make a folder that you want to share with client end. Let's suppose we make a folder in /var/ with name "mnt" Mount a remote folder with SSHFS Now I will mount this folder from the remote server. In my case the remote server IP…

11/09/2020 0comments 2267hotness 1likes kyaky Read all
Tutorials

How To Add Swap on CentOS 7

Introduction One of the easiest ways to make your server more responsive, and guard against out-of-memory errors in your application, is to add some swap space. Swap is an area on a storage drive where the operating system can temporarily store data that it can no longer hold in memory. This gives you the ability to increase the amount of information that your server can keep in its working memory, with some caveats. Reading from and writing to swap is slower than using memory, but it can provide a good safety net for when your server is low on memory. Without swap, a server that runs out of memory may start killing applications to free up memory, or even crash. This can cause you to lose unsaved data or experience downtime. To ensure reliable data access, some applications require swap to function. In this guide, we will cover how to create and enable a swap file on a CentOS 7 server. Note Although swap is generally recommended for systems utilizing traditional spinning hard drives, using swap with SSDs can cause issues with hardware degradation over time. Due to this consideration, we do not recommend enabling swap on DigitalOcean or any other provider that utilizes SSD storage. Doing so can impact the reliability of the underlying hardware for you and your neighbors. If you need to improve the performance of your server, we recommend upgrading your Droplet. This will lead to better results in general and will decrease the likelihood of contributing to hardware issues that can affect your service. Prerequisites Before you…

11/09/2020 0comments 1371hotness 1likes kyaky Read all
Review

Mega.nz has server side speed limit which they never admit

Please keep walking if you never complain about their transfer speed. if you think what you paid for is good enough for 10mbytes/s then just ignore this review. I am a customer from Australia. I pick Mega because they are New Zealand company which I thought it could be very good. I've been with MEGA.NZ for 1 year for their business account. I can honestly tell you their service is going down. They never admit they have server-side transfer speed limit, instead they shift the problem to customers' internet issue. Sorry this trick might work for some standard customers with small plan, but I do not buy it. They asked me to open speedtest.net to choose Datacentre Luxembourg S.A for speed test where I assume their server is. I know our local server in Australia wouldn’t perform good to that location and they would say "that’s your network problem". So, I picked 2 dedicated 1G port servers in our Germany node and Finland Node and both give the result around 400Mbit download and 900Mbit upload, which is equal to 400/8=50Mbtye/s and 112Mbtye/s. which means the communication is very smooth between the datacentres where my servers are and their storage datacentre in Luxembourg. I opened web mega, transfer speed for a 5G file is like 10Mbtye/s , the other one is 8Mbtye/s. How could that be possible? ok. I picked another server of ours in Luxembourg a few kms away from their datacentre giving a speed test result 400Mbit D/ 400Mbit/U, guess what? using they server to transfer a 5G file…

11/09/2020 0comments 1356hotness 0likes kyaky Read all
Tutorials

How to install Aria2 + AriaNg on CentOS 7

Aria2 (https://github.com/aria2/aria2) aria2 is a lightweight multi-protocol & multi-source command-line download utility. It supports HTTP/HTTPS, FTP, SFTP, BitTorrent and Metalink. aria2 can be manipulated via built-in JSON-RPC and XML-RPC interfaces. Install Aria2 Install directly through yum, you might need to install an EPEL source first Configure Aria2 Taking an example, in this case we create necessary files under /root directory Save and modify the following code to create an aria2.conf file. Note that you need to modify the file save path and RPC authorization token for later use. Run Aria2 Run Method 1 This way to run Aria2 will not allow you to save settings modifed during this connected session Run Method 2 This will save all the changes during the connected session Run Aria2 when server boot add "aria2c --conf-path=/root/.aria2/aria2.conf -D &" to /etc/rc.d/rc.local AriaNG (https://github.com/mayswind/AriaNg) AriaNg is a modern web frontend making aria2 easier to use. AriaNg is written in pure html & javascript, thus it does not need any compilers or runtime environment. You can just put AriaNg in your web server and open it in your browser. AriaNg uses responsive layout, and supports any desktop or mobile devices. Install AriaNG check the latest release at: https://github.com/mayswind/AriaNg/releases unzip the release zip file into your webserver http folder. eg. Setting up AriaNg Open browser visit domain where the unzipped index.html is, you will see the web interface of AriaNg. Navigate to AriaNg Settings fill up the token we typed in conf file previously and you will see on bottom left bar showing connected. Everthing is sweet now.

07/09/2020 0comments 3757hotness 2likes kyaky Read all
Tips

rclone mount mega.nz cloud storage as local drive

 

06/09/2020 0comments 1831hotness 0likes kyaky Read all
QuickFix

rclone: Fatal error: failed to mount FUSE fs: fusermount: exec: "fusermount": executable file not found in $PATH

install fuse package

06/09/2020 0comments 1640hotness 0likes kyaky Read all
Tutorials

How to Create a Table of Content in WordPress Posts and Pages

Did you ever want to add a Wikipedia like table of content box on some of your long articles? A table of content makes it easier for users to jump to the section they want to read. In this article, we will show you how to create a table of content in WordPress posts and pages without writing any HTML or CSS. Why Add Table of Contents in WordPress Posts? You may have seen the table of contents on websites like Wikipedia. A table of contents makes it easier for users to jump to the section they want to read in long articles. It also helps with your WordPress SEO because Google automatically adds a jump to section link next to your site in search results. You can manually create a table of contents in WordPress by writing HTML code. However that is difficult for beginners because you have to manually create a list, add links, and add ID attribute through-out the article. But there’s an easy way. Let’s take a look on how to easily create a table of contents in WordPress posts and pages. If you don’t want to watch the video tutorial, then you can continue reading the text version below: Creating a Table of Contents in WordPress First thing you need to do is to install and activate the Easy Table of Contents plugin. Upon activation, you need to visit Settings » Table of Contents page. From here, you can manage general settings for the table of contents like selecting position, choosing a label for the container, etc. You can also…

06/09/2020 0comments 5336hotness 0likes kyaky Read all
Tutorials

How To Add Swap on CentOS 7

Introduction One of the easiest ways to make your server more responsive, and guard against out-of-memory errors in your application, is to add some swap space. Swap is an area on a storage drive where the operating system can temporarily store data that it can no longer hold in memory. This gives you the ability to increase the amount of information that your server can keep in its working memory, with some caveats. Reading from and writing to swap is slower than using memory, but it can provide a good safety net for when your server is low on memory. Without swap, a server that runs out of memory may start killing applications to free up memory, or even crash. This can cause you to lose unsaved data or experience downtime. To ensure reliable data access, some applications require swap to function. In this guide, we will cover how to create and enable a swap file on a CentOS 7 server. Note Although swap is generally recommended for systems utilizing traditional spinning hard drives, using swap with SSDs can cause issues with hardware degradation over time. Due to this consideration, we do not recommend enabling swap on DigitalOcean or any other provider that utilizes SSD storage. Doing so can impact the reliability of the underlying hardware for you and your neighbors. If you need to improve the performance of your server, we recommend upgrading your Droplet. This will lead to better results in general and will decrease the likelihood of contributing to hardware issues that can affect your service. Prerequisites Before you…

06/09/2020 0comments 849hotness 0likes kyaky Read all
Tips

Unix Create a Symbolic Link

How do I create a symbolic links under Linux or Unix like operating systems using command line options? You need to use the ln command. It is a standard Unix / Linux / BSD command to create links to files. There are two types of links under UNIX, hard and soft link: Hard link vs. Soft link in Linux or UNIX [a] Hard links cannot links directories ( cannot link /tmp with /home/you/tmp) [b] Hard links cannot cross file system boundaries ( cannot link /tmp mounted on/tmp to 2nd hard disk mounted on /harddisk2)  Symbolic links refer to a symbolic path indicating the abstract location of another file [d] Hard links, refer to the specific location of physical data. UNIX create a symbolic link command To create a symbolic link, enter: $ ln -s {/path/to/file-name} {link-name} $ ln -s /shared/sales/data/file.txt sales.data.txt $ vi sales.data.txt $ ls -l sales.data.txt How do I delete a symbolic link? To delete a link, enter: $ rm {link-name} $ rm sales.data.txt $ ls -l $ ls -l /shared/sales/data/file.txt If you delete the soft link itself (sales.data.txt) , the data file would still be there ( /shared/sales/data/file.txt ). However, if you delete /shared/sales/data/file.txt, sales.data.txt becomes a broken link and data is lost. UNIX create a hardlink command To create hard link, enter (without the -s option): $ ln {file.txt} {hard-link} $ ln /tmp/file link-here How do I delete a hard link? You can delete hard link with the rm command itself: $ rm {hard-link} $ rm link-here If you delete a hard link, your data would be there. If you delete /tmp/file your data still be accessible via link-here hard link file.

06/09/2020 0comments 884hotness 0likes kyaky Read all
Tutorials

How To Mount and Unmount Drives on Linux

After creating disk partitions and formatting them properly, you may want to mount or unmount your drives. On Linux, mounting drives is done via mountpoints on the virtual filesystem, allowing system users to navigate the filesystem as well as create and delete files on them. In this tutorial, we are going to see how you can mount and unmount drives on your Linux system. We are also going to see how you can amend the fstab file in order to make your mount settings permanent. Prerequisites In order to mount drives and filesystems on Linux, you need to have sudo privileges on your machine. To verify that you have sudo privileges, you can run the “sudo” command with the “-l” in order to list the privileges you currently own. $ sudo -l User <user> may run the following commands on schkn-ubuntu: (ALL : ALL) ALL If you are not sure how to give sudo rights to users on Debian/Ubuntu or CentOS/RHEL, make sure to check our dedicated guides on the subject. Mount Drives on Linux In order to mount drives on Linux, you have to use the “mount” command using the following syntax $ sudo mount <device> <dir> First of all, you need to check the disk partitions already created on your system that are not already mounted. To list partitions with filesystems types, use the “lsblk” command with the “-f” option. $ lsblk -f NAME FSTYPE LABEL UUID MOUNTPOINT sda ├─sda1 ext4 0935df16-40b0-4850-9d47-47cd2daf6e59 sdb ├─sdb1 ext4 b9df59e6-c806-4851-befa-12402bca5828 / Alternatively, you can use the “blkid” command in order to locate and list block devices on your system. Unfortunately, this command does not list the…

06/09/2020 0comments 1207hotness 0likes kyaky Read all
Tutorials

How to attach BuyVM/FranTech Block Storage Slabs to Linux

As system administrators, we would have got requirements wherein we need to configure raw hard disks to the existing servers as part of upgrading server capacity or sometimes disk replacement in case of disk failure. Attaching BuyVM/FranTech Block Storage Slabs to a Linux has the similar approach. In this article, I will take you through the steps by which we can add the new Block Storage Slabs to an existing Linux server such as RHEL/CentOS or Debian/Ubuntu. Important: Please note that the purpose of this article is to show only how to create a new partition and doesn’t include partition extension or any other switches. I am using fdisk utility to do this configuration. I have added a hard disk of 512GB capacity to be mounted as a /data partition. fdisk is a command line utility to view and manage hard disks and partitions on Linux systems. Firstly, you need to login BuyVM/FranTech Stallion control panel to attach your Block Storage Slabs to your VM. This will list the current partitions and configurations. After attaching the hard disk of 512GB capacity, the fdisk -l will give the below output. New disk added is shown as /dev/sda. Some will show as /dev/xvdcbased of the disk type. To partition a particular hard disk, for example /dev/sda. Type m to print command options Here since we are creating a partition use n option to create either primary/extended partitions. By default we can have upto 4 primary partitions. ive the partition number as desired. Recommended to go for the default value 1. Give the value of the first sector. If it is a new disk, always select default value. If you…

06/09/2020 2comments 5420hotness 1likes kyaky Read all
Tips

How to secure Nginx against all malicious web crawlers / bots

Protective measures for a server are very important and there are several ways to protect your websites and apps from malicious bots. You can just simply add this piece of code into Nginx Conf file server{} section:

05/09/2020 0comments 787hotness 0likes kyaky Read all
Offers

PacificRack Returns with Another Offer! (1GB for $1/mo on Annual Contract in Los Angeles)

PacificRack has returned with another outstanding offer based!  We’ve featured them before, and they are a sub-brand of Quadranet, familiar name in the community.  Quadranet itself is big time, based in the famous One Wilshire Building (aka “the world’s most connected building”). This offer is in LA, and looks pretty nice: KVM on Virtualizor riding on E5-2620 v2 or v4 with SSD RAID 10, coming in at 1GB of RAM per dollar per month.  That’s on an annual contract but some of the bigger offerings go down to quarterly.  For those prices, you’re not risking much and you’re with a well-known provider, so buy with confidence. In their own words: “PacificRack is a sub-brand of QuadraNet, all our business are managed under QuadraNet. QuadraNet was originally formed in 2001 as a telecommunications provider in Los Angeles and the surrounding areas. As our client base grew, we adapted to the evolving industries and expanded our service offerings over time to encompass a larger variety of Internet-based products and services.” Their WHOIS is public, they are a registered company in the USA, their legal docs can be found here, and they accept credit cards, PayPal, and Alipay. Network and host node info after the jump, but first, here are the offers: 1GB VPS 1GB RAM1GB Swap1x vCPU20GB SSD space2TB Transfer200Mbps uplink1x IPv4KVM/VirtualizorSetup Free: LEB$12/Year[ORDER] 2GB VPS2GB RAM2GB Swap2x vCPU40GB SSD space4TB Transfer200Mbps uplink1x IPv4KVM/VirtualizorSetup Free: LEB$24/Year[ORDER] 4GB VPS4GB RAM4GB Swap4x vCPU80GB SSD space8TB Transfer200Mbps uplink1x IPv4KVM/VirtualizorSetup Free: LEB$12/Quarterly$24/Semi-Annually$48/Annually[ORDER] 8GB VPS8GB RAM8GB Swap8x vCPU160GB SSD space16TB Transfer200Mbps uplink1x IPv4KVM/VirtualizorSetup Free: LEB$24/Quarterly$48/Semi-Annually$96/Annually[ORDER] Host node info and network details available…

04/09/2020 0comments 806hotness 0likes kyaky Read all
Offers

RackNerd Best Value x4 Cores Yearly Plan Revealed

4GB RAM KVM VPS 4x vCPU Cores55 GB SSD Cached RAID-10 Storage4 GB RAM8000GB Monthly Premium Bandwidth1Gbps Public Network PortFull Root Admin Access1 Dedicated IPv4 AddressKVM / SolusVM Control Panel - Reboot, Reinstall, Manage rDNS, & much moreLOCATION: Los AngelesJUST $39.89/YEAR or $77.78/2 YEARS ORDER NOW

01/09/2020 0comments 812hotness 0likes kyaky Read all
Offers

RackNerd Best Value Yearly Plan Revealed

NEW WEBSITE SPECIAL! 3.5GB KVM3x vCPU Core45GB SSD Cached RAID-10 Storage3.5GB RAM7000GB Monthly Premium Bandwidth1Gbps Public Network PortFull Root Admin Access1 Dedicated IPv4 AddressKVM / SolusVM Control Panel - Reboot, Reinstall, Manage rDNS, & much moreLOCATION: Los AngelesJUST $28.99/YEAR - WOW!! ORDER HERE

01/09/2020 0comments 617hotness 0likes kyaky Read all
Tutorials

How to change default kernel (boot with old kernel) – CentOS/RHEL/OEL 7

1. Check the current running Kernel Version 2. List the Kernel Entries as per GRUB2 file: 3. Let us modify the Kernel Version to "CentOS Linux (5.8.5-1.el7.elrepo.x86_64) 7 (Core)" which is at line number 2 but denoted as entry 1. 4. Changes to /etc/default/grub require rebuilding the grub.cfg file as follows: Reboot the Server and it will boot with Kernel Version 5.8.5-1.el7.elrepo.x86_64.

28/08/2020 0comments 840hotness 0likes kyaky Read all
Benchmark

RamNode-sea-skvm-2 Hypervisor Benchmark

RamNode ORDER HERE CPU Model : Intel Xeon E3-12xx v2 (Ivy Bridge, IBRS)CPU Cores : 1CPU Frequency : 2599.998 MHzCPU Cache : 16384 KBTotal Disk : 15.0 GB (3.3 GB Used)Total Mem : 487 MB (66 MB Used)Total Swap : 2047 MB (0 MB Used)System uptime : 0 days, 0 hour 2 minLoad average : 0.20, 0.20, 0.08OS : CentOS 7.6.1810Arch : x86_64 (64 Bit)Kernel : 3.10.0-957.21.3.el7.x86_64TCP CC : cubicVirtualization : KVMOrganization : AS3842 RamNode LLCLocation : Austin / US Region : Texas I/O Speed(1st run) : 719 MB/sI/O Speed(2nd run) : 722 MB/sI/O Speed(3rd run) : 754 MB/s Average I/O speed : 731.7 MB/s Processor: Intel Xeon E3-12xx v2 (Ivy Bridge, IBRS)CPU cores: 1Frequency: 2599.998 MHzRAM: 487MSwap: 2.0GKernel: Linux 3.10.0-957.21.3.el7.x86_64 x86_64 Disks:vda 15G HDD CPU: SHA256-hashing 500 MB2.660 secondsCPU: bzip2-compressing 500 MBCPU: AES-encrypting 500 MB2.197 seconds ioping: seek ratemin/avg/max/mdev = 121.9 us / 207.0 us / 11.8 ms / 214.9 usioping: sequential read speedgenerated 10.1 k requests in 5.00 s, 2.46 GiB, 2.01 k iops, 503.6 MiB/s dd: sequential write speed1st run: 775.34 MiB/s2nd run: 818.25 MiB/s3rd run: 790.60 MiB/saverage: 794.73 MiB/s IPv4 speedtestsyour IPv4: 192.184.90.xxxx IPv6 speedtestsyour IPv6: 2604:180:f2:xxxx OVH BHS (CA): 5.64 MiB/s RamNode ORDER HERE

27/08/2020 0comments 424hotness 0likes kyaky Read all
Benchmark

RamNode-sea-skvm-1 Hypervisor Benchmark

RamNode ORDER HERE CPU Model : AMD EPYC Processor (with IBPB)CPU Cores : 1CPU Frequency : 2100.000 MHzCPU Cache : 512 KBTotal Disk : 15.0 GB (3.3 GB Used)Total Mem : 487 MB (69 MB Used)Total Swap : 2047 MB (0 MB Used)System uptime : 0 days, 0 hour 3 minLoad average : 0.02, 0.06, 0.04OS : CentOS 7.6.1810Arch : x86_64 (64 Bit)Kernel : 3.10.0-957.21.3.el7.x86_64TCP CC : cubicVirtualization : KVMOrganization : AS3842 RamNode LLCLocation : Greenville / US Region : North Carolina I/O Speed(1st run) : 737 MB/sI/O Speed(2nd run) : 767 MB/sI/O Speed(3rd run) : 734 MB/s Average I/O speed : 746.0 MB/s Processor: AMD EPYC Processor (with IBPB)CPU cores: 1Frequency: 2100.000 MHzRAM: 487MSwap: 2.0GKernel: Linux 3.10.0-957.21.3.el7.x86_64 x86_64 Disks:vda 15G HDD CPU: SHA256-hashing 500 MB0.776 secondsCPU: bzip2-compressing 500 MBCPU: AES-encrypting 500 MB1.342 seconds ioping: seek ratemin/avg/max/mdev = 102.8 us / 219.3 us / 11.9 ms / 206.6 usioping: sequential read speedgenerated 10.0 k requests in 5.00 s, 2.45 GiB, 2.00 k iops, 501.4 MiB/s dd: sequential write speed1st run: 1049.04 MiB/s2nd run: 1049.04 MiB/s3rd run: 1144.41 MiB/saverage: 1080.83 MiB/s IPv4 speedtestsyour IPv4: 192.184.90.xxxx IPv6 speedtestsyour IPv6: 2604:180:f2:xxxx OVH BHS (CA): 10.08 MiB/s RamNode ORDER HERE

27/08/2020 0comments 434hotness 0likes kyaky Read all
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