Installing on RedHat and CentOS

Preliminaries

Check disk size

Create a user named openkm

Check server configuration

$ sudo yum install pciutils

Increase ulimit

add the following lines to the end of the file (before the line # End of file)

Checking Java version

 If Java is correctly installed on your computer, the name and version of the Java virtual machine is displayed:

Install Java

Download from https://www.oracle.com/technetwork/java/javase/downloads/index.html 

Set JDK 1.8 as your default Java version

Installing database

Install MySQL if you do not have it already installed:

Configure it as service:

'SELINUX=disabled'

Change MySQL root password

Do it only If it's necessary to change the MySQL root password.

Method 1

Method 2

Method 3

Method 4

More information at MySQL : Reseting permissions.

Check InnoDB is default MySQL engine

If it not default, modify /etc/mysql/my.cnf

and under [mysqld] add

Create database

Installing OpenKM and Tomcat bundle

Configuring Tomcat as a service

Create a file with the script:

#!/bin/sh
 
### BEGIN INIT INFO
# Provides:          tomcat
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Start and stop Apache Tomcat
# Description:       Enable Apache Tomcat service provided by daemon.
### END INIT INFO
 
ECHO=/bin/echo
TEST=/usr/bin/test
TOMCAT_USER=openkm
TOMCAT_HOME=/home/openkm/tomcat
TOMCAT_START_SCRIPT=$TOMCAT_HOME/bin/startup.sh
TOMCAT_STOP_SCRIPT=$TOMCAT_HOME/bin/shutdown.sh
 
$TEST -x $TOMCAT_START_SCRIPT || exit 0
$TEST -x $TOMCAT_STOP_SCRIPT || exit 0
 
start() {
    $ECHO -n "Starting Tomcat"
    su - $TOMCAT_USER -c "$TOMCAT_START_SCRIPT &"
    $ECHO "."
}
 
stop() {
    $ECHO -n "Stopping Tomcat"
    su - $TOMCAT_USER -c "$TOMCAT_STOP_SCRIPT 60 -force &"
    while [ "$(ps -fu $TOMCAT_USER | grep java | grep tomcat | wc -l)" -gt "0" ]; do
        sleep 5; $ECHO -n "."
    done
    $ECHO "."
}
 
case "$1" in
    start)
        start
        ;;
    stop)
        stop
        ;;
    restart)
        stop
        sleep 30
        start
        ;;
    *)
        $ECHO "Usage: tomcat {start|stop|restart}"
        exit 1
esac
exit 0

Make it executable:

Update the run-levels:

Check the service

Start the service:

Stop the service:

Installing thirdparty software

Start application

Check OpenKM.cfg parameters

Your configuration should be something like this:

First time application start:

To check if the startup process can execute the command:

When the application is started you'll see in log file the lines:

2015-07-04 18:28:10,680 [main] INFO  org.apache.coyote.http11.Http11Protocol - Starting ProtocolHandler ["http-bio-0.0.0.0-8080"]
2015-07-04 18:28:10,688 [main] INFO  org.apache.coyote.ajp.AjpProtocol - Starting ProtocolHandler ["ajp-bio-127.0.0.1-8009"]
2015-07-04 18:28:10,692 [main] INFO  org.apache.catalina.startup.Catalina - Server startup in 41456 ms

The application will be accessible at http://YOUR_IP:8080/OpenKM by user:okmAdmin with password:admin. ( Do not forget to change it !). For more information please check: Manage users and roles.

Configure the default extensions:

Go to Administration > Database query and execute:

INSERT INTO OKM_EXTENSION (EXT_UUID, EXT_NAME) VALUES ('808e7a42-2e73-470c-ba23-e4c9d5c3a0f4', 'Live Edit');
INSERT INTO OKM_EXTENSION (EXT_UUID, EXT_NAME) VALUES ('58392af6-2131-413b-b188-1851aa7b651c', 'HTML Editor 4');
INSERT INTO OKM_PROFILE_MSC_EXTENSION (PEX_ID, PEX_EXTENSION) VALUES (1, '808e7a42-2e73-470c-ba23-e4c9d5c3a0f4');
INSERT INTO OKM_PROFILE_MSC_EXTENSION (PEX_ID, PEX_EXTENSION) VALUES (1, '58392af6-2131-413b-b188-1851aa7b651c');

Linux Oracle 7.X  Throubleshooting

The libreoffice and tesseract tools are not into the default repositories, you cal follow the steps described in the URL below for installing them:

Install libreoffice from RPM

Install Tesseract

#!/bin/sh

cd /opt

yum -y update 
yum -y install libstdc++ autoconf automake libtool autoconf-archive pkg-config gcc gcc-c++ make libjpeg-devel libpng-devel libtiff-devel zlib-devel

#Install AutoConf-Archive
wget ftp://mirror.switch.ch/pool/4/mirror/epel/7/ppc64/a/autoconf-archive-2016.09.16-1.el7.noarch.rpm
rpm -i autoconf-archive-2016.09.16-1.el7.noarch.rpm

#Install Leptonica from Source
wget http://www.leptonica.com/source/leptonica-1.75.3.tar.gz
tar -zxvf leptonica-1.75.3.tar.gz
cd leptonica-1.75.3
./autobuild
./configure
make
make install
cd ..

#!/bin/sh

#Install Tesseract from Source
wget https://github.com/tesseract-ocr/tesseract/archive/3.05.01.tar.gz
tar -zxvf 3.05.01.tar.gz
cd tesseract-3.05.01
./autogen.sh
PKG_CONFIG_PATH=/usr/local/lib/pkgconfig LIBLEPT_HEADERSDIR=/usr/local/include ./configure --with-extra-includes=/usr/local/include --with-extra-libraries=/usr/local/lib
LDFLAGS="-L/usr/local/lib" CFLAGS="-I/usr/local/include" make
make install
ldconfig
cd ..

#Download and install tesseract language files
wget https://github.com/tesseract-ocr/tessdata/raw/3.04.00/ben.traineddata
wget https://github.com/tesseract-ocr/tessdata/raw/3.04.00/eng.traineddata
wget https://github.com/tesseract-ocr/tessdata/raw/3.04.00/hin.traineddata
wget https://github.com/tesseract-ocr/tessdata/raw/3.04.00/tha.traineddata
wget https://github.com/tesseract-ocr/tessdata/raw/3.04.00/osd.traineddata
mv *.traineddata /usr/local/share/tessdata

#Download Hindi Cube data
wget https://github.com/tesseract-ocr/tessdata/raw/3.04.00/hin.cube.bigrams
wget https://github.com/tesseract-ocr/tessdata/raw/3.04.00/hin.cube.fold
wget https://github.com/tesseract-ocr/tessdata/raw/3.04.00/hin.cube.lm
wget https://github.com/tesseract-ocr/tessdata/raw/3.04.00/hin.cube.nn
wget https://github.com/tesseract-ocr/tessdata/raw/3.04.00/hin.cube.params
wget https://github.com/tesseract-ocr/tessdata/raw/3.04.00/hin.cube.word-freq
wget https://github.com/tesseract-ocr/tessdata/raw/3.04.00/hin.tesseract_cube.nn
mv hin.* /usr/local/share/tessdata

ln -s /opt/tesseract-3.05.01 /opt/tesseract-latest

Other common additional setup configurations 

OpenKM comes with a lot of configuration parameters we suggest taking a look at: Recommended configuration parameters.

• Configuring Apache HTTP Reverse-Proxy
• Configuring Tomcat mail
• Configuring Tomcat memory utilization 
• Configuring Tomcat port
• Configuring Tomcat SSL/TLS
• Configuring Tomcat timezone