February 2023

February 2023

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Why Important to Keep Linux Server Updated

CentOS Server, Linux Server, Ubuntu Server, Website Load Balancer /

Keeping your server updated is an essential task for any system administrator. By installing security updates, bug fixes, and patches, you can help ensure the security and stability of your server. In this blog post, we’ll cover why it’s important to keep your server updated and some best practices to follow. Why Is It Important to Keep Linux Server Updated? There are several reasons why it’s important to keep your server updated: Best Practices for Keeping Your Server Updated Here are some best practices to follow when keeping your server updated: To ensure that your server is always up-to-date, you should set up automatic updates. Most Linux distributions come with built-in tools for automatic updates, such as Yum or Apt-Get. You can configure these tools to automatically download and install updates as soon as they become available. Before installing updates on your production server, you should test them on a development or staging server. This will help you identify any issues that may arise from the updates, such as compatibility issues with other software or configuration changes. Before installing updates, you should always check the release notes and changelogs. These documents provide information about the changes and bug fixes included in the updates, which can help you identify any potential issues. Some updates may require a server reboot or cause temporary downtime. To minimize the impact on your users, you should schedule downtime for updates during off-peak hours. Although updates are designed to improve your server, they can sometimes cause issues or data loss. To protect your data, you should keep regular backups of your server. This will allow you to quickly recover from any issues that may arise. In conclusion, keeping your server updated is an essential task for any system administrator. By installing security updates, bug fixes, and patches, you can help ensure the security, stability, and performance of your server. By following these best practices, you can ensure that your server is always up-to-date and running smoothly. Want to Hire a System Administrator? Please Contact: LinkedIn +971 5280 19445 +880 1911 343443 YouTube channel: https://www.youtube.com/@trainbrain007

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Securing Linux Server: Best Practices

CentOS Server, Linux Server, Ubuntu Server /

Securing a Linux server is a critical task for any system administrator. Without proper security measures, your server could be vulnerable to attacks, which can compromise your data and even your customers’ data. In this blog post, we’ll cover some of the best practices for securing Linux server. One of the most important steps in securing your Linux server is to keep it up-to-date. This includes installing security updates, bug fixes, and patches as soon as they become available. You can automate this process by using tools such as Yum or Apt-Get. Using strong passwords and SSH keys is crucial for securing your Linux server. Passwords should be at least 12 characters long and include a combination of upper and lower case letters, numbers, and symbols. You can use password managers like LastPass or KeePass to create and manage strong passwords. Additionally, you should use SSH keys for remote access to your server, which is more secure than using passwords. A firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. Configure a firewall to only allow traffic that is necessary for the services you need to run. You can use tools like IPTables or UFW to set up a firewall on your Linux server. Limiting access to your server is an important step in securing it. You should only allow access to users who need it and restrict access to everyone else. Use tools like SSH keys or VPNs to restrict access to your server. Encryption is the process of converting information into a code to prevent unauthorized access. Use encryption for data in transit and at rest. For data in transit, use SSL/TLS to encrypt data sent over the internet. For data at rest, use full disk encryption to encrypt the entire disk or file-level encryption to encrypt individual files. Use monitoring tools to keep an eye on your server and detect any suspicious activity. Tools like Nagios or Zabbix can be used to monitor server health and alert you in case of any issues. Additionally, you can use log monitoring tools like Logwatch or Logrotate to monitor system logs for any suspicious activity. In conclusion, securing your Linux server requires a combination of best practices, including keeping your server updated, using strong passwords and SSH keys, configuring a firewall, limiting access to your server, using encryption, and using monitoring tools. By following these best practices, you can help ensure the security and integrity of your Linux server. Want to Hire a System Administrator? Please Contact: LinkedIn +971 5280 19445 +880 1911 343443 YouTube channel: https://www.youtube.com/@trainbrain007

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How to install Jitsi on Ubuntu server

Linux Server, Ubuntu Server /

Jitsi is an open-source video conferencing application that you can install Jitsi on Ubuntu server. Here are the steps to install Jitsi on Ubuntu server: That’s it! You should now have Jitsi installed on your Ubuntu server. Instead of Domain How to Configure IP? If you don’t have a domain name, you can configure Jitsi with your server’s IP address. Here are the steps to do it: That’s it! You should now be able to use Jitsi on Ubuntu server with your IP address as the domain. How to Open Port in Order to Access Jitsi from a Web Browser? There are several ports that you need to open in order to access Jitsi from a web browser. By default, Jitsi uses the following ports: You need to open these ports in your server’s firewall to allow incoming traffic. Here’s how to do it: After opening the necessary ports, you should be able to access Jitsi using your server’s IP address in a web browser. Note that using an IP address instead of a domain name can cause issues with certificate validation and security warnings in the browser. To avoid these issues, it’s recommended to use a domain name with a valid SSL certificate for your Jitsi installation. Want to Hire a System Administrator? Please Contact: LinkedIn +971 5280 19445 +880 1911 343443 YouTube channel: https://www.youtube.com/@trainbrain007

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The Ultimate Guide to Spam Prevention on Your Email Server

aaPanel control Panel, CentOS Server, Control Panel, Linux Server, Ubuntu Server, WHM/cPanel control Panel /

Preventing spam is a crucial step in safeguarding your email servers from unwanted messages that clog up your inbox and create security risks. Whether you’re running a cPanel or Plesk server or managing your own email server, implementing effective spam prevention measures can save you time, improve productivity, and enhance your security posture. In this article, we’ll explore some of the best practices for preventing spam on your cPanel, Plesk, DirectAdminor email server, and provide you with the knowledge and tools you need to take action and protect your email accounts. Here are some steps you can take for spam prevention on your Email server: By implementing these measures, you can significantly reduce the amount of spam on your Email server. When enabling certain features, you may encounter issues with email delivery or email receive, such as messages being blocked due to blacklisted IP addresses. It is important to be aware of these potential problems and take steps to mitigate them to ensure that your email communication runs smoothly. While enabling graylisting can be an effective way to prevent spam, there are some potential issues to be aware of: To minimize these issues, it’s important to configure your graylisting settings appropriately, and to monitor your email logs to identify any issues or false positives. You can also use other anti-spam measures in conjunction with graylisting to provide a more robust anti-spam solution. While enabling RBL (Real-Time Blacklist) filtering can be an effective way to prevent spam, there are some potential issues to be aware of: To minimize these issues, it’s important to use a reputable and up-to-date RBL service, and to configure your RBL settings appropriately. You can also use other anti-spam measures in conjunction with RBL filtering to provide a more robust anti-spam solution. Enabling Email Rate Limiting can help prevent spam and reduce the load on your server, but there are some potential issues to be aware of: To minimize these issues, it’s important to configure your Email Rate Limiting settings appropriately based on the typical email traffic on your server. It’s also a good practice to monitor your email logs to identify any issues or false positives. By doing so, you can help prevent spam and maintain reliable email delivery for your users. Summary In summary, enabling anti-spam measures such as RBL filtering, graylisting, and Email Rate Limiting can help spam prevention on your Email server, but there are potential issues associated with each of these measures. It’s important to configure your settings appropriately based on your specific needs and to monitor your email logs to identify any issues or false positives. By taking a multi-layered approach to anti-spam measures and adjusting your settings as needed, you can provide a more robust anti-spam solution and maintain reliable email delivery for your users. YouTube channel: https://www.youtube.com/@trainbrain007

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Extend Linux root partition

CentOS Server, Linux Server, Proxmox VE, Ubuntu Server, Virtualization, Website Load Balancer /

This article lead you How to Extend Linux root Partition [root@62 ~]# parted /dev/sda GNU Parted 3.1 Using /dev/sda Welcome to GNU Parted! Type ‘help’ to view a list of commands. (parted) print Model: QEMU QEMU HARDDISK (scsi) Disk /dev/sda: 215GB Sector size (logical/physical): 512B/512B Partition Table: msdos Disk Flags: Number Start End Size Type File system Flags1 1049kB 1075MB 1074MB primary xfs boot2 1075MB 107GB 106GB primary lvm resizepart 2 100% print (parted) resizepart 2 100% (parted) print Model: QEMU QEMU HARDDISK (scsi) Disk /dev/sda: 215GB Sector size (logical/physical): 512B/512B Partition Table: msdos Disk Flags: Number Start End Size Type File system Flags1 1049kB 1075MB 1074MB primary xfs boot2 1075MB 215GB 214GB primary lvm (parted) quitInformation: You may need to update /etc/fstab. Show current disk at VM [root@62 ~]# df -h Filesystem Size Used Avail Use% Mounted ondevtmpfs 2.8G 0 2.8G 0% /devtmpfs 2.8G 0 2.8G 0% /dev/shmtmpfs 2.8G 273M 2.6G 10% /runtmpfs 2.8G 0 2.8G 0% /sys/fs/cgroup/dev/mapper/centos-root 93G 7.1G 86G 8% //dev/sda1 1014M 150M 865M 15% /boot/dev/loop0 3.9G 8.4M 3.7G 1% /tmptmpfs 571M 0 571M 0% /run/user/0 show current Phisycal Volume [root@62 ~]# pvdisplay — Physical volume — PV Name /dev/sda2 VG Name centos PV Size <98.76 GiB / not usable 3.00 MiB Allocatable yes PE Size 4.00 MiB Total PE 25281 Free PE 1 Allocated PE 25280 PV UUID lQWYWH-bMEf-QHpS-xEej-B9G0-su0v-Vj8as7 Resize Phisycal Volume [root@62 ~]# pvresize /dev/sda2 Physical volume “/dev/sda2” changed 1 physical volume(s) resized or updated / 0 physical volume(s) not resized [root@62 ~]# pvdisplay — Physical volume — PV Name /dev/sda2 VG Name centos PV Size <199.00 GiB / not usable 2.00 MiB Allocatable yes PE Size 4.00 MiB Total PE 50943 Free PE 25663 Allocated PE 25280 PV UUID lQWYWH-bMEf-QHpS-xEej-B9G0-su0v-Vj8as7 Resize Logical Volume [root@62 ~]# lvresize –extents +100%FREE –resizefs /dev/centos/root Size of logical volume centos/root changed from 93.00 GiB (23808 extents) to <193.25 GiB (49471 extents). Logical volume centos/root successfully resized. meta-data=/dev/mapper/centos-root isize=512 agcount=4, agsize=6094848 blks = sectsz=512 attr=2, projid32bit=1 = crc=1 finobt=0 spinodes=0 data = bsize=4096 blocks=24379392, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=1 log =internal bsize=4096 blocks=11904, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 data blocks changed from 24379392 to 50658304 Now check the updated extended disk space using this command.show current disk [root@62 ~]# df -Th Filesystem Type Size Used Avail Use% Mounted on devtmpfs devtmpfs 2.8G 0 2.8G 0% /dev tmpfs tmpfs 2.8G 0 2.8G 0% /dev/shm tmpfs tmpfs 2.8G 273M 2.6G 10% /run tmpfs tmpfs 2.8G 0 2.8G 0% /sys/fs/cgroup /dev/mapper/centos-root xfs 194G 7.1G 187G 4% / /dev/sda1 xfs 1014M 150M 865M 15% /boot /dev/loop0 ext4 3.9G 8.4M 3.7G 1% /tmp tmpfs tmpfs 571M 0 571M 0% /run/user/0 disk partition centos-root mapper now changed from 400 GB to 800 GB !!! Yahoo! You can watch this video tutorial for better understand.

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How to install sabnzbd on Ubuntu

Linux Server, Ubuntu Server /

These are the prerequisites to install Sabnzbd on the Ubuntu operating system. Step 1: Before install sabnzbd, add repository and update using this following command: #sudo apt-get install software-properties-common Make sure multiverse and universe are enabled: Press Enter once get confirm message Step 2: Now install SABnzbd on Ubuntu, use the following command: After SABnzbd installation on Ubuntu completes you can start it using the shortcut icon that was created in the menu or you could use the following command: Edit default file to configure IP and port. (I am using nano editor. If you do not have you can use vi or you can install nano) user=root (or username)config=host= xx.xxx.xx.xx (your ip address)port= 8080 (declare a port here) Now we configure sbnzbd.ini file. Declare IP address and Port. Find following line and change the line with required value. host= xx.xx.xx.xx (use your ip)port= 8080 (declare same port as before)user= admin (anything you can put here as username)password= password Reboot your server. Run sabnzbdplus Start the service using following line: Good luck! For better understanding watch the video tutorial. (If you need help you can contact me to install sabnzbd on your server) YouTube Channel: https://www.youtube.com/@trainbrain007

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