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How to configure Wi-fi+Lan bridged access point in pfSense firewall...
I have installed wireless mini-PCIe card for my pfSense firewall. How do I configure a bridged LAN wifi access point (AP) network and setup pfSense?
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Ubuntu 16.04 Create a cron.log File To Log crontab LogsnixCraft
I am a new Ubuntu Linux 16.04 user. How do I verify that my cron job is executing? I am unable to find /var/log/cron.log file. Where is the cron log file on Ubuntu 16.04 LTS server?
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cron Error: bad username; while reading /etc/cron.d file on LinuxnixCraft
I am getting the following error in my cron job log file /var/log/cron.log: Aug 22 01:59:01 server2 cron[7510]: Error: bad username; while reading /etc/cron.d/backups I have job entry as follows...
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How to configure Postfix relayhost (smarthost) to send eMail using an...
How do I configure Postfix MTA to send eMail using an external cloud-based SMTP server (with username: password) from a web server on Linux or Unix-like system? How do I configure an Ubuntu server and...
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How to install KVM on Ubuntu 16.04 LTS Headless ServernixCraft
Kernel-based Virtual Machine (KVM) is a virtualization module for the Linux kernel that turns it into a hypervisor. How can I install KVM with bridged networking, setup guest operating system as the...
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How to force users to use secure passwords on Ubuntu/Debian LinuxnixCraft
My Linux shell user can modify their password using the passwd command. How can I force users to choose the secure password that will prevent users from using stupid passwords like "abc123",...
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How to apply patches on OpenBSD system/kernel and packages easilynixCraft
I am a regular Linux system user. In Linux (especially CentOS), I am used to applying updates a few times a week using yum command, but how do I do that on my OpenBSD severer? How do I apply updates on...
View ArticleHow to create snapshot in Linux KVM VM/DomainnixCraft
Before upgrading my virtual machine, I would like to make a snapshot. I want to revert a domain/VM to a snapshot if something goes wrong with my upgrade. Is there a command to create a snapshot of...
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How to live patch Ubuntu Linux Kernel without rebooting the servernixCraft
Kernel live patching enables runtime correction of critical security issues in running kernel without rebooting. How do I enable or patch my Ubuntu Linux 16.04 LTS server without rebooting the box?
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How To Patch and Protect Linux Kernel Zero Day Local Privilege Escalation...
A very serious security problem has been found in the Linux kernel. A 0-day local privilege escalation vulnerability has existed for eleven years since 2005. This bug affects all sort of of Android or...
View ArticleHow to install PHP 7 on Debian Linux 8.6/7.x [jessie/wheezy]nixCraft
I wanted to use PHP 7 on Debian 8.x. How do I install and configure PHP 7 on Debian Linux 8.x server? How do I install PHP 7 on Debian Linux 7.x “wheezy” VPS server hosted in cloud? PHP 7 is a dynamic...
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How to forcefully mark down pfSense Gateway as downnixCraft
I have two internet connections (fiber and 4G LTE) configured in load balanced mode using pfSense FreeBSD based firewall. One of my connection is running out of bandwidth quota. How can I force and...
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How to delete KVM VM guest using virsh commandnixCraft
I am a new Linux and KVM user. How do I delete a VM guest with virsh command line on Linux operating system? How do I delete a virtual machine called vps42 on Ubuntu or CentOS Linux server?
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How to automatically mount zfs file system on Linux/Unix/FreeBSDnixCraft
I have created a zfs file system called data/vm_guests on Ubuntu Linux server. After the server reboot, zpools do not automatically mount at /data/vm_guests. It is failing my KVM guest machines. How...
View ArticleHow to run commands on Linux Container (LXD) instance at provision launch...
I would like to perform common automated configuration tasks and run commands/scripts after the LXD instance starts. How to use cloud-init to run commands on my Linux Container (LXD) instance at launch...
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How to use curl command with http/2 on MacOS XnixCraft
I am using a MacOS sierra (version 10.12.1). How do I use curl command with http2/ protocol? I am getting an error that read as follows:
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How to install LXD container hypervisor on Ubuntu 16.04 LTS servernixCraft
How do I install LXD container "hypervisor" to runs unmodified Debian/Ubuntu/CentOS Linux operating systems VM at incredible speed on a Ubuntu Linux 16.04 LTS server?
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How to remove all old and outdated brew packages on MacOSnixCraft
I am using Homebrew to install packages on MacOS Sierra or Mac OS X. I noticed multiple version of bash or curl installed in /usr/local/Cellar/bash/. How can I delete an outdated version of brew...
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Linux kvm exit from a virsh console commandnixCraft
I installed KVM on Ubuntu server as described here. However, I am unable to get out of a 'virsh console domain' command. How can I exit from a "virsh console" connection over ssh based session?
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How to check if port is in use on Linux or UnixnixCraft
How do I determine if a port is in use under Linux or Unix-like system? How can I verify which ports are listening on Linux server?
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