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How To Install Apache Tomcat 9 on CentOS 7
# Apache Tomcat 9.x instructions for installation on CentOS Linux 7
# Apache needs JDK 8 installed on environment (we prefer Oracle JVM HotSpot!)
# find out instructions how to install :D
# A | create tomcat user :: should be run as an unprivileged user
# 1. create a new tomcat group
sudo groupadd tomcat
# 2. create a tomcat user ::
# member of the tomcat group, home directory of /opt/tomcat (install), shell of /bin/false (nobody login)
sudo useradd -M -s /sbin/nologin -g tomcat -d /opt/tomcat tomcat
# B | installation
cd ~
mkdir development
wget []
# install tomcat to the /opt/tomcat directory
sudo mkdir /opt/tomcat
sudo tar xvf apache-tomcat-8*tar.gz -C /opt/tomcat --strip-components=1
# C | update permissions :: proper access to the tomcat installation
cd /opt/tomcat
# tomcat group ownership over the entire installation directory
sudo chgrp -R tomcat /opt/tomcat
# tomcat group read access to the conf directory, and execute access to the directory
sudo chmod -R g+r conf
sudo chmod g+x conf
# make the tomcat user the owner of the directories
sudo chown -R tomcat webapps/ work/ temp/ logs/
# D | install systemd unit file
# create and open unit file service
sudo vim /etc/systemd/system/tomcat.service
# paste the content of tomcat.service []
# reload Systemd to load the tomcat unit file
sudo systemctl daemon-reload
# start tomcat service
sudo systemctl start tomcat
sudo systemctl status tomcat
# enable the tomcat service start on server boot (optional)
sudo systemctl enable tomcat
# Created symlink from /etc/systemd/system/ to /etc/systemd/system/tomcat.service.
# change de port of tomcat webserver in conflicts
# search for <Connector port="8080" ...
sudo vim /opt/tomcat/conf/server.xml
# E | tomcat web management interface
# edit tomcat-users.xml file
sudo vim /opt/tomcat/conf/tomcat-users.xml
# add line <user username="admin" password="password" roles="manager-gui,admin-gui"/>
# remove restrict access to the tomcat manager :: comment ip address (loopback)
# 1. manager app
sudo vim /opt/tomcat/webapps/manager/META-INF/context.xml
# 2. host-manager app
sudo vi /opt/tomcat/webapps/host-manager/META-INF/context.xml
# restart the service!
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