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Linux and Unix tutorials for new and seasoned sysadmin

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    My cloud provider allows me to run a shell script when new Ubuntu Linux 16.04 LTS machine created. I want to install LXD service and create a one VM with specific private IP using a shell script? How do I create an LXD VM when the cloud server launches?

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    I have two VPS running in the cloud. The first one is the database, and another one is the web server. I want to secure traffic that flows between private network which is insecure by design and I do not want to use OpenVPN due to complex settings. How do I install and setup tinc VPN server and secure my traffic over VPN on Ubuntu Linux 16.04 LTS server?

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    How do I use Tinc to create a mesh network of two different VPN on the same server? Is it possible to create multiple VPN tunnels between two hosts using tinc VPN software?

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    I am a new Debian Linux version 9 server user. How do I setup an OpenVPN Server on Debian Linux version 9.x or 8.x server to shield my browsing activity from bad guys on public Wi-Fi, and more?

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    I have a three server replicated volume setup (scalable network filesystem for cloud and VMs). I need to add one more server. How do I add a new a new brick to an existing replicated volume on a Debian or Ubuntu/CentOS Linux?

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    I am a new Linux sysadmin. How do I install or update microcode firmware for Intel/AMD CPUs on Linux using the command line option?

    The post How to install/update Intel microcode firmware on Linux appeared first on nixCraft.


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    How do I install and configure KVM (Kernel-based Virtual Machine) on a CentOS 7 or RHEL (Red Hat Enterprise Linux) 7 server? How can I setup KMV on a CentOS 7 and use cloud images/cloud-init for installing guest VM?

    The post How to install KVM on CentOS 7 / RHEL 7 Headless Server appeared first on nixCraft.


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    I am using Debian Linux 9 “stretch” on the desktop. I would like to create network bridge with NetworkManager. But, I am unable to find the option to add br0. How can I create or add network bridge with nmcli for NetworkManager on Linux? A bridge is nothing but a device which joins two local … Continue reading "How to add network bridge with nmcli (NetworkManager) on Linux"

    The post How to add network bridge with nmcli (NetworkManager) on Linux appeared first on nixCraft.


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    All supported versions of FreeBSD affected by Meltdown (CVE-2017-5754), Spectre variant 1 (CVE-2017-5753), and Spectre variant 2 (CVE-2017-5715). How do I patch Meltdown and Spectre vulnerabilities on FreeBSD (speculative execution vulnerabilities) server powered by 64 bit Intel CPU?

    The post How to patch Meltdown and Spectre vulnerabilities on FreeBSD appeared first on nixCraft.


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    I am using Lenovo laptop. I want to update my BIOS but do not have Windows installed my system. How do I update Lenovo BIOS from Linux without using MS-Windows operating system with the help of a USB stick?

    The post How to update Lenovo BIOS from Linux without using Windows appeared first on nixCraft.


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    I recently added hard disk to my FreeBSD based server. How do I configure an encrypted ZFS pool to store data on this disk? How can I add encrypted ZFS pool on FreeBSD 11.x server?

    The post How to add encrypted ZFS pool on FreeBSD server appeared first on nixCraft.


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    How do I install and configure a FreeBSD jail with vnet? How do I create FreeBSD jail with /etc/jail.conf without using iocage command or ezjail command line tool?

    The post How to configure a FreeBSD Jail with vnet and ZFS appeared first on nixCraft.


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