#!/bin/bash
DPATH=$(mktemp)
cat - > $DPATH

set -x

k=$(grep -o 'shard-1' $DPATH) # shard ends by a number#
i=$(grep -o 'shard-1' $DPATH | cut -c7)
m=$((i+1))
n="shard-$m"
sed -i "s|${k}|${n}|g" $DPATH