Search Maven package
apt-cache search maven
Install it
sudo apt-get install maven
Verification
mvn -version
Where is Maven installed
The command apt-get install the Maven in /usr/share/maven
The Maven configuration files are stored in /etc/maven
Installation Tomcat using apt-get
sudo apt-get install tomcat7
Install the package using apt-get
sudo apt-get install tomcat7-docs
sudo apt-get install tomcat7-examples
sudo apt-get install tomcat7-admin
The above instruction is more than enough to install the tomcat. If any error happened please follow the below the instructions.
Setup the JDK path for Tomcat
sudo nano /etc/default/tomcat7 : add the JDK path inside the file
Set the path
sudo nano ~/.bashrc
export CATALINA_HOME=/usr/share/tomcat7
Stop Server:
sudo /etc/init.d/tomcat7 stop
Start Server:
sudo /etc/init.d/tomcat7 start
Folder locations of tomcat :
Tomcat bin and lib file location :
/usr/share/tomcat7
Tomcat xml file :
/etc/tomcat7
Tomcat config and webapp files:
/var/lib/tomcat7/
Tomcat JDK and Path Setup
sudo nano /etc/default/tomcat7
To Run Tomcat on port 80
<Connector port="8080" protocol="HTTP/1.1"
connectionTimeout="20000" redirectPort=
"8443" />
Change 8080 to 80 in /config/server.xml file
AND
Remove the comment using :
sudo nano /etc/default/tomcat7 and
change #AUTHBIND=no
as AUTHBIND=yes
To remove all the files
sudo apt-get purge libtomcat7-java tomcat6 tomcat6-admin tomcat6-docs tomcat6-examples tomcat7 tomcat7-admin tomcat7-common tomcat7-docs tomcat7-examples tomcat7-user
To check what are the process running on port 80
netstat -tulpn | grep :80
Server.XML user name and password
<role rolename="manager-gui"/>
<user username="Dhanu" password="" roles="manager-gui"/>
<role rolename="admin-gui"/>
<user username="Dhanu" password="" roles="admin-gui"/>
NOTE:
Change the Heap memory in tomcat :
sudo nano /etc/default/tomcat7 and change the line on -Xms value
JAVA_OPTS="-Djava.awt.headless=true -Xmx2048m -XX:+UseConcMarkSweepGC"
In Default It’s limited to 128MB.
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
public class test {
public static void main(String[] args) throws IOException {
test t = new test();
t.getCropImage();
}
public void getCropImage() throws IOException {
int widthOfNewImage = 100;
int heightOfNewImage = 100;
int offsetFromLeft = 10;
int offsetFromTop = 100;
String path = "input.gif";
String newPath = "newImage.png";
String imageFormat = "png";
BufferedImage image = ImageIO.read(new File(path));
int height = image.getHeight();
int width = image.getWidth();
System.out.println("Height : " + height + "\nWidth : " + width);
BufferedImage out = image.getSubimage(offsetFromLeft, offsetFromTop,
widthOfNewImage, heightOfNewImage);
ImageIO.write(out, imageFormat, new File(newPath));
}
}
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link type="text/css" rel="stylesheet"href="${pageContext.request.contextPath}/css/bootstrap.min.css" />
<script type="text/javascript"src="//ajax.googleapis.com/ajax/libs/jquery/2.0.2/jquery.min.js"></script>
<title>Concept Extractor</title>
<script type="text/javascript">
$(document).ready(function() {
alert("asdf");
});
</script>
Before Installation Check your java Jdk installed or not.
Step 1:
Download the Apache tomcat 7 from the bellow link,
Step2:
md5sum apache-tomcat-[#].tar.gz
Next, extract the package:
tar xvzf apache-tomcat-[#].tar.gz
And move the extracted folder into a dedicated directory:
sudo mv apache-tomcat-[#] /usr/local/apache
Step3: Set the path
vi ~/.bashrc
export CATALINA_HOME=/usr/local/apache
Log out and log back into bash to have your changes take effect.
Step4: Start tomcat
sudo /usr/local/apache/bin/startup.sh
Step 5 : Check
Go to web browser and type ,
http://localhost:8080