Count Apache errors by date

gistfile1.txt

date;
cd /var/log/apache2; mkdir combined_error_logs;
rsync -a -e ssh root@www1:/var/log/apache2/error* combined_error_logs/www1;
rsync -a -e ssh root@www2:/var/log/apache2/error* combined_error_logs/www2;
date;
cd combined_error_logs/www1; gunzip *.gz; cd ../..;
cd combined_error_logs/www2; gunzip *.gz; cd ../..;
date;
cat combined_error_logs/*/* | sed -r -n 's/^\[(\w+) (\w+ \w+) ..:..:.. (\w+).+/\3 \2 \1/p' | awk '{count[$1]++}END{for(j in count) print j" "count[j]}' FS=: | sort > errors_by_date.$(date +%Y-%m-%d).txt;
rm -rf combined_error_logs;
date;