Setup Tomcat to run as a non-Root user on Ubuntu

setup-tomcat

USER_ID=1000

TOMCAT_VERSION=9.0.70

TOMCAT_FILENAME=apache-tomcat-${TOMCAT_VERSION}

SETUP_DIR=/var/local/tomcat

mkdir -p ${SETUP_DIR} && cd ${SETUP_DIR}

wget https://dlcdn.apache.org/tomcat/tomcat-9/v${TOMCAT_VERSION}/bin/${TOMCAT_FILENAME}.tar.gz
tar -xvf ${TOMCAT_FILENAME}.tar.gz
cd ${TOMCAT_FILENAME}

## create uid=1000(tomcat) gid=1000(tomcat)
useradd --uid ${USER_ID} --user-group --shell /bin/bash tomcat

## set group and group permissions to directories
chgrp -R tomcat .
chmod -R g+rX .
chmod -R g+w logs temp work

export CATALINA_HOME=${SETUP_DIR}/${TOMCAT_FILENAME}
export CATALINA_BASE=/srv/www/catalina-base

mkdir -p ${CATALINA_BASE}
chgrp -R tomcat ${CATALINA_BASE}
chmod -R g+srwX ${CATALINA_BASE}

su tomcat

bin/makebase.sh ${CATALINA_BASE}

echo "Hello Tomcat" > ${CATALINA_BASE}/webapps/ROOT/index.html

bin/catalina.sh run