A variety of scripts I find useful everywhere.
To install...
$ git clone git@github.com:alexmbird/misc-scripts.git /opt/mockyscriptsTo add to system-wide path:
$ sudo vi /etc/environment
# Append '/opt/mockyscripts' to PATH
$ source /etc/environment && export PATHTo make them work seamlessly under sudo:
$ sudo visudo -f /etc/sudoers.d/path
# Add something like:
Defaults secure_path="/opt/mockyscripts:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"Use ffmpeg to transcode a video to hevc, saving much disk space.
Use ImageMagick to batch-convert images to jpeg with options for scaling & noise reduction.
Run a command on every LXC container within a host.
Example:
$ on-all-lxc apt-get -y -qq update
container1 output...
container2 output...Convert individual flac files or a directory full of them into mp3s mp3 or opus using ffmpeg/avconv.
- Preserves tags & filesystem metadata
- Preserves cover art & other files
- ...but does not preserve
.curand.logfiles, since they belong in flac-land - Encoders are mostly singlethreaded, so uses a Python ThreadPool to run as many in parallel as you have cores for a huge speedup.
- Supports the new opus codec, giving better compression & higher quality than mp3.
- Invokes r128gain to add replaygain tags to the transcoded output.
Requires Python 3.4+.
Test flash media by writing & validating random files.
Counterfeit flash media typically fakes its size by overwriting existing blocks. This means writes succeed, and you only discover something is wrong when you later try to read your data. Flashtest fills your device with random files then uses checksums to validate the data can be re-read.
Also useful for detecting genuine-but-worn-out media.
NB: O_DIRECT is unavailable on OSX. Thus there's no way (without a sudo purge) to fully disable the OS's block cache. It is assumed that your flash media is sufficiently larger than ram for this not to matter :)
No warranty but it works for me. Be aware that repeatedly writing to your flash wears it out.
Requires Python 3+