docker
Finally I got some chances to package one application using docker, here are some useful commands docker images: docker build –rm -t my_tag docker_dir ( with Dockerfile) docker images ,…
C++11 std::unique_ptr as semantic value in Bison C++ mode
Recently I spent some time to write a DSL ( domain specific Language) lexer and parser. Without double flex, bison (C++) will be used. Bison ( version 3.0.2/3.04) generally support…
Geocoding 40 millions US addresses totally free with PostGIS 2.1 on debian 8
Postgis 2.1 ( on debian 8) make geocoding US addresses ( about 40 Million ) quite easy, and it is totally free! Thanks for the PostGIS and PostGRESQL open source…
socat introduction
While searching a command line to write something into a UNIX Domain Socket, I found this great tool called socat which is similar to netcat/samplicator but has more features. The…
How to see all network traffic in (KVM) VM
if your NIC ( eth0) of the KVM (VM) is on the host device br0,and you want to see all the network traffics, what you can do is: on the…
systemctl cheatsheat
Systemd template and instance (@) from: https://wiki.archlinux.org/index.php/systemd Note: Some unit names contain an @ sign (e.g. name@string.service): this means that they are instances of a template unit, whose actual file…
how to update default session-manager for GDM3
I like to use gnome-flashback mode which is like old gnome2 desktop, but I keep on forgetting this how to set the default login session, so put notes here. sudo…
lxc /dev increased from 100k to 500k and some other minor issues
While using lxc container, one annoying thing is the disk size of /dev was limited to 100k by default, with some hardware ( with lxc.autodev=1), the /dev could go beyond…
what is application container, OS container , VM
Application container: docker OS containers: LXC, OpenVZ, Linux VServer, BSD Jails, Solaris Zones VM: KVM, VMware, VirtualBox Good images from https://blog.risingstack.com/operating-system-containers-vs-application-containers/ References https://blog.risingstack.com/operating-system-containers-vs-application-containers/ http://www.itworld.com/article/2915530/virtualization/containers-vs-virtual-machines-how-to-tell-which-is-the-right-choice-for-your-enterprise.html https://www.flockport.com/supercharge-lxc-with-btrfs/
Linux device driver: A fix for insmod invalid module format
How to fix “insmod invalid module format” for a out-of-tree linux device driver or kernel module? If your kernel source tree matched your run time kernel, it turns out that…