Tech

Oracle Java in Ubuntu

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add-apt-repository -y ppa:webupd8team/java apt-get update apt-get install oracle-java8-installer apt-get install oracle-java8-unlimited-jce-policy ln -s /usr/lib/jvm/java-8-oracle /usr/lib/jvm/default-java

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Verbose boot for Centos 7

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To disable graphical booting in CentOS 7, some suggest that we need to edit file /etc/default/grub as follows: # vi /etc/default/grub Remove “rhgb quiet” from the line beginning with “GRUB_CMDLINE_LINUX”, as shown below: GRUB_CMDLINE_LINUX="crashkernel=auto rd.lvm.lv=centos/root rd.lvm.lv=centos/swap" However, this does not work. THE RIGHT WAY: The following will produce the results we are looking for: Step […]

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Remove unused Kernels in Centos

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The command package-cleanup remove older kernel. Use –count=1 to keep just the latest. The program will never remove the kernel currently used (“Not removing kernel 3.10.0-327.el7 because it is the running kernel”), so you may end-up with two kernels in /boot… until you reboot and re-run the command. So the command is package-cleanup –oldkernels –count=1 […]

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AmigaOS 3.9 Emergency Boot Floppy ADF

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Image with CD0 removed for UAE as it has its own CD driver Emeboot-UAE Image as built by the AmigaOS 3.9 Installer for use with real Amigas Emeboot-Real_Amiga Note both images have had the System font size reduced to 11 so it will fit the default screen res You may have to alter the CD0 […]

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Amiga UAE write to floppies

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UAE by default does not write to ADF files, but makes an overlay file located in ~/Documents/FS-UAE/Save States This is fine but it you want to alter an ADF to take back to a real Amiga this is useless as the overlays cannot be used. However toy can tell UAE to write to the ADF […]

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Show Hidden Files in Mac OS X Dialog Boxes

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Need to reveal hidden files and folders while opening or saving a file on the Mac? You can show them immediately with nothing but a quick keystroke. To instantly show hidden files and directories in the Mac OS X “Open” and “Save” dialog boxes, all you need to do is hit Command+Shift+Period together and those […]

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OS X’s Hidden Bluetooth Debug Menu: Reset Devices and More

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If you’re having serious issues with a connected peripheral device like a Bluetooth keyboard or mouse, you should know that there’s a special menu option buried beneath the Bluetooth symbol near the top-right of your screen. f you’re missing that icon, you can get it to appear there by visiting System Preferences > Bluetooth and […]

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Connecting Docker Containers, Part Two

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This post is part two of a miniseries looking at how to connect Docker containers. In part one, we looked at the bridge network driver that allows us to connect containers that all live on the same Docker host. Specifically, we looked at three basic, older uses of this network driver: port exposure, port binding, […]

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Connecting Docker Containers, Part One

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Docker containers are self-contained, isolated environments. However, they’re often only useful if they can talk to each other. There are many ways to connect containers. And we won’t attempt to cover them all. But in this miniseries, we will look at some common ways. This topic seems elementary, but grasping these techniques and the underlying […]