Just run this from your Mac terminal and it'll drop you in a container with full permissions on the Docker VM. This also works for Docker for Windows for getting in Moby Linux VM (doesn't work for Windows Containers).
docker run -it --rm --privileged --pid=host justincormack/nsenter1
more info: https://github.com/justincormack/nsenter1
In the poppler-utils packages there is the utility pdftoppm capable of converting pages from a pdf file to ppm, png or jpeg format:
pdftoppm -png file.pdf prefix
will produce prefix-01.png etc. for each page. By default the resolution is 150dpi. Increase the resolution (for higher quality output) as follows:
pdftoppm -rx 300 -ry 300 -png file.pdf prefix
source: http://askubuntu.com/a/50180
| // derived from http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance#Parallel_algorithm | |
| function map() { | |
| emit(1, // Or put a GROUP BY key here | |
| {sum: this.value, // the field you want stats for | |
| min: this.value, | |
| max: this.value, | |
| count:1, | |
| diff: 0, // M2,n: sum((val-mean)^2) | |
| }); |