ApacheのMaxClientsをsedで変更する

sed -i -e "s/ServerLimit\( *\)\([0-9]\+\)/ServerLimit\1 64/g" /etc/httpd/conf/httpd.conf
sed -i -e "s/MaxClients\( *\)\([0-9]\+\)/MaxClients\1 64/g" /etc/httpd/conf/httpd.conf