IT Featured Articles on cool technologies, focused on System Administration and Programming Languages
Bash scripting is very easy to setup. So we end up using it all the time for simple procedural script. Sometimes is it useful to have idempotent script, like Ansible and Saltstack teach use, this script should only do an action if needed. Some tima ago, I have the need to convert a bunch of …
I’d like to point you to this blog article about “cycle stepped” 6502 emulator. It is well described and can be a neat read for xmas vacation. Also author’s main project is all about A toolbox of 8-bit chip-emulators, helper code and complete embeddable system emulators in dependency-free C headers (a subset of C99 that …
Suppose you are developing a boring Jenkins pipline (like Jenkinsfile-s) with no time at all. You are forced to commit and then run the jenkins pipeline. Jenkins download the code from your LOCAL repository. To avoid commit& push roundtrip you are using the simple git daemon command to expose your local repository to jenkins. So …
Some co-workers started using Apache Kafka con a bunch of our Customers. Apache Kafka is a community distributed event streaming platform capable of handling trillions of events a day. Initially conceived as a messaging queue, Kafka is based on an abstraction of a distributed commit log[*]. To get this goal, Apache Kafka needs a complex …
Use docker in docker to drive docker from a container Working under windows, sometimes docker slow down. Sometimes you need to access to the MobyVM. With this line: docker run –rm -ti -v “/var/run/docker.sock:/var/run/docker.sock” -v /:/host docker sh you run a container which will removed upon exit. This container can access to docker daemon (via …
Some time ago I mentioned the Pyc64 project, a “differently emulated” C/64. There’s a much more ambitious project that’s going under pressure, it’s called Commander X 16. Commander X 16 has been started by David Murray and three other guys. David’s desire was to create an 8-bit computer similar to the C/64 but a little …
Ring – Cache interface as a programming language integrationRing provides function-oriented cache interface for various backends. Repository: https://github.com/youknowone/ring/ Source: Ring – Cache interface as a programming language integration — Ring 0.7.2 documentation
We just finished implementing a dev ops deploy toolchain able to compile,deploy, rollback all in automatic way. The objection of the dev team is “it is slow to deploy”. Yes, it is slower then manual copying file. But it is AUTOMATIC It provide a rollback procedure. It is rock solid. It works alone, at midnight. …
https://asciinema.org/
isync: free IMAP and MailDir mailbox synchronizerisync is a command line application which synchronizes mailboxes; currently Maildir and IMAP4 mailboxes are supported. New messages, message deletions and flag changes can be propagated both ways. isync is suitable for use in IMAP-disconnected mode.Synchronization is based on unique message identifiers (UIDs), so no identification conflicts can occur …
isync: free IMAP and MailDir mailbox synchronizer Read More »
On these days I decided to tune a bit my new shiny linux server box. I started to set up fail2ban. I think fail2ban is very imporant nowadays because it is a good example of a tool for slowing down attacks without closing your server too much. Fail2ban is a daemon: it wll monitor your …
I am studying Apache Kafka (a “distributed streaming platform”) and I stubled upon this conclusion: the “disk read fear” a lot of projects have in the past, is a fake. A lot of distributed database started tutorial with the statement “disk read are slow, write are fast” which is true to some extent, and accounted …
?FileSystem is faster than RAM [under your Operating System] Read More »
On this Christmas, a lot of us will pay more then $1000 for a new iPhone XY or for a similar Samsung one (twice the price of a netbook) and you will have in your hand a quite powerful machine: for instance iPhone used as Theorem Prover is faster then an Intel Workstation (!) It is …
Sometimes your windows’ HyperV Hypervisor will refuse to start. The problem is tricky because the services seems started if you check them. Also the installation is successful, virtualization is enabled and so on. So what is wrong?
To understand Angular 4, after the “Hero” tutorial you should start from the Template syntax. We highlighted some statement in red below: Data direction Syntax Type One-way from data source to view target {{expression}} [target]=”expression” bind-target=”expression” Interpolation Property Attribute Class Style One-way from view target to data source (target)=”statement” on-target=”statement” Event Two-way [(target)]=”expression” bindon-target=”expression” Two-way …
