Simple bash script to extract and clean a Wikipedia dump. Adapted from: https://github.com/facebookresearch/XLM/blob/master/get-data-wiki.sh

extract_and_clean_wiki_dump.sh

#!/bin/sh
set -e

WIKI_DUMP_FILE_IN=$1
WIKI_DUMP_FILE_OUT=${WIKI_DUMP_FILE_IN%%.*}.txt

# clone the WikiExtractor repository
git clone https://github.com/attardi/wikiextractor.git

# extract and clean the chosen Wikipedia dump
echo "Extracting and cleaning $WIKI_DUMP_FILE_IN to $WIKI_DUMP_FILE_OUT..."
python3 -m wikiextractor.WikiExtractor  $WIKI_DUMP_FILE_IN --processes 8 -q -o - \
| sed "/^\s*\$/d" \
| grep -v "^<doc id=" \
| grep -v "</doc>\$" \
> $WIKI_DUMP_FILE_OUT
echo "Succesfully extracted and cleaned $WIKI_DUMP_FILE_IN to $WIKI_DUMP_FILE_OUT"

As commented on my other Gist, it is a .xml.bz2 file. For a complete guide on how to download, extract, clean and pre-process a Wikipedia dump, see this Medium post.