Running Java GUI application in Docker
This is a more specific use case of running GUI application with Docker, the procedure is pretty simple (and most option are common for most GUI application), You mount the UNIX socket for the...
Category: Linux
Setup NAT with iptables
The Setup Having this setup where Machine A like to connect the Internet via Machine B.
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+-------------------+ +-----------------+ | | | Machine B | | Machine A | | (the gateway) | | (the client) | | | | | | | | eth0 +----------+ eth0 eth1 | +-------------------+ +-------------+---+ | | .-~~~-. | .- ~ ~-( )_ _ | / ~ -. | | internet \<----+ \ .' ~- . _____________ . -~ |
Add the following lines to the iptables
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iptables -I FORWARD -o eth0 -m comment --comment "NAT" -j ACCEPT iptables -I FORWARD -i eth0 -m comment --comment "NAT" -j ACCEPT iptables -I POSTROUTING -o eth1 -m comment --comment "NAT" -j MASQUERADE -t nat |
and make sure to enable forwarding on Machine B
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sysctl -w net.ipv4.ip_forward=1 |
GitKraken not loading in Fedora (libcurl.so.4 issue)
GitKraken is a very nice tool to work with git, it really simplify some of the common tasks which most users need to work with git, and the nice GUI is another plus. Long...
Upgrading Fedora Installation on DigitalOcean
I found this method works for me,
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#Check if user is root if [[ $EUID -ne 0 ]]; then echo "Sudo privileges required!" exit 1; fi dnf update NEXT_VERSION=25 rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-${NEXT_VERSION}-$(uname -i) dnf update dnf dnf clean all dnf --releasever=${NEXT_VERSION} distro-sync # dnf remove firewalld-config-standard # dnf install system-release-server sync |
You may need to run restorecon -R / to fix any SELinux issues. Resource https://gist.github.com/kallisti5/01f6df3bfb77b978abfe
Visualize real-time data streams with Gnuplot
Some times when I need to troubleshoot a problem, adding some visualization to the process can help a lot, especially if one need to correlate between 2 (or more) metrics in the data. But...
Run Command Before Starting SSH Connection
This a quick hack I found while I was looking to run a knock script before connecting to servers which I have the SSH service protected with a knock sequence. In my setup I...
Building CinelerraCV for Fedora 22 under Docker
The Dockerfile
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#FROM 195a4b79eb1c #Version 0.4 FROM Fedora-Docker-Base-22-20150521.x86_64 MAINTAINER rabin@rabin.io RUN dnf update -y && dnf install -y mock rpmdevtools tmux htop && dnf clean all RUN ["dnf", "install", "-y", "http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-22.noarch.rpm", "http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-22.noarch.rpm"] RUN ["/usr/sbin/useradd", "-m", "builder"] #ENTRYPOINT ["/usr/bin/su", "-", "builder"] VOLUME ["/home/builder"] |
This Dockerfile will use Fedora Docker image (which you can download from any Fedora mirror server, and then use docker import to import the image) as the base for our builder image,...
[NetworkManager] Using dispatcher.d to run scripts based on network connectivity
This post is based on my personal need to mount/umount some network shares automatically when I’m switching between networks (e.g Homer/Office). Later on I was looking to make it more modular and came out...
Setup Xdebug for remote debug over SSH
If you have PHP application you need to debug, and there is a firewall between you and the hosting server, One can use SSH to tunnel the traffic from the remote site to the...
Toggle Audio Output Between Several Devices
With PulseAudio one can choose the output (in PA syntax, it’s called “sink-input”) device for each audio stream, for example, I can listen to my music on my headphone (USB sound card in my...
