Delete a solr core

delete-core.sh

#!/bin/bash

clear
echo "*************************************************************************"
echo "*************************************************************************"
echo
echo "            You are about to *permanently* delete a core!"
echo "                      There is no going back"
echo
echo "*************************************************************************"
echo "*************************************************************************"
echo
echo -n "Type 'delete core' to continue or control-c to bail: "
read answer

if [ "$answer" != "delete core" ]; then
 exit
fi
# removes a Solr core
if [ "$1" = "" ]; then
 echo -n "Name of core to remove: "
 read name
else
 name=$1
fi

if [ ! -d /var/lib/solr/data/$name ] || [ $name = "" ]; then
 echo "Core doesn't exist"
 exit
fi

curl "http://127.0.0.1:8080/solr/admin/cores?action=UNLOAD&core=$name"
sleep 5
rm -rf /var/lib/solr/data/$name

rm -rf  /etc/solr/conf/$name

Actually according to this link https://wiki.apache.org/solr/CoreAdmin#UNLOAD you don't need to delete the folders manaually. Since Solr4.0 there are two more optional parameters are "deleteDataDir" and "deleteInstanceDir" on core unload.

deleteDataDir removes "data" and all sub-directories
deleteInstanceDir removes everything related to the core, the index directory, the configuration files, etc. This command would remove the directory core0 and all sub-directories.

So a curl command curl "http://127.0.0.1:8080/solr/admin/cores?action=UNLOAD&core=$name&deleteInstanceDir=true" will take care of the folder deleting automatically