gdal_translate
Convert raster data between different formats.
TLDR
Convert a raster dataset to JPEG format
$ gdal_translate -of [JPEG] [path/to/input.tif] [path/to/output.jpeg]
Assign a projection to a raster dataset
$ gdal_translate -a_srs [EPSG:4326] [path/to/input.tif] [path/to/output.tif]
Reduce the size of a raster dataset to a specific fraction
$ gdal_translate -outsize [40%] [40%] [path/to/input.tif] [path/to/output.tif]
Convert a GeoTiff to a Cloud Optimized GeoTiff
$ gdal_translate [path/to/input.tif] [path/to/output.tif] -of COG -co COMPRESS=LZW
