TheJoe.it Into the (open) source

29Mar/130

Crontab: planned actions with Linux

cronometro_300

The program we are discussing today is cron, a lightweight Linux daemon that deals with launch command at user defined intervals. It is often confused with "crontab", which in reality is nothing but its configuration file, containing the commands to launch and the time intervals. Someone will remember crontab (we used in the tutorial on "time lapse" to take pictures in automatic). In today's article we see an overview of working with cron, accompanied by examples of use, and modify the crontab file.

10Jul/123

Photography: “time lapse” con gPhoto2

20d_time_lapse

Today I raised the issue of "time lapse", a particular photographic technique that through the sequence of shots allows the creation of small animations. To get an idea of ​​what the time lapse, I refer you to spectacular video easily available on youtube, or rather those dedicated of this page.

For the good time lapse is necessary to automate the process of shooting, in practice less personal things are entrusted to the skill, the better the end result.

1Jul/102

Stream images from the webcam every minute with GNU / Linux

webcam_streaming

Recently I was asked how he could do to organize a stream webcam that may control the Weather Conditions of a given area. The images of the stream must then be placed on a dedicated page of a site. Unfortunately, (or fortunately) I had to run into a big problem that at first seemed insurmountable: la webcam is locally attached, the server that hosts the site è remote.

This small detail was going to make me give up, when I remembered the existence of "Curlftpfs" (where there we have already discussed) to mount the remote FTP seen by the system as if it were a local. A real godsend.