Howtos / Articles

Find what Linux kernel version you are running

To determine what version of the Linux kernel you are currently using, you can use the uname command as per the examples below. $ uname -a This will output the host name of the computer, Kernel version, and the CPU architecture. Example output: $ uname -a Linux localhost.localdomain 2.6.32-279.19.1.el6.x86_64 #1 SMP Wed Dec 19 07:05:20 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux $ localhost.localdomain being the host name of the computer 2.6.32 being the kernel version (the rest relates specifically to…

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Live Monitoring of Log Files on Linux

The tail command which is found on almost all Linux distributions is used to output the last part of files. There is a parameter for the tail command that allows you to monitor a file, and continually output new lines from the file as they are added. This is especially handy for monitoring log files that are constantly being updated. The commands below can be used to continuously monitor log files. Monitor a log file using tail: $ tail -f…

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List Folder and File Size and Sort By Size on Linux

A common requirement on any operating system is to be able to view the total size of a list of folders and files on the file system, and be able to sort the list by size. Generally this isn’t straight forward to do. The commands below can be used to do just that. Display folder sizes and sort in ascending order: $ du -sBM * | sort -n Example: $ du -sBM * | sort -n 0M man 1M etc…

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Apple Push Notification Firewall Ports

If you are writing an iOS application that needs to communication with the Apple APN (Apple Push Notification) servers, or if you are are an end user behind a strict firewall, the information below can be used to correctly configure the firewall rules to allow access.…

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Installing FreeNAS 8 to USB on Windows

This ‘how to’ guide will step you through the process of installing FreeNAS 8 to a USB memory stick using a Windows computer. This can be a handy too if you have a system that has crashed, and you just want to get it back up and running so you can copy files off of it. You can simply plug in a USB memory stick with FreeNAS installed to it, configure it to share out one or more of the…

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