How to install and configure tomcat 6 in ubuntu server

Tomcat is a well known and widely used java servlet container. These days I am planning a project, which needs a tomcat 6 in ubuntu server. I found that to make tomcat work in ubuntu is very easy, but you need have a little trick to change your server listening port from 8080 to 80. Here I give you the way that I make it work.

1. Install tomcat 6 in ubuntu
normally, you just need to type the following command to install it
sudo apt-get install tomcat6 tomcat6-admin tomcat6-common tomcat6-user tomcat6-docs tomcat6-examples

2. Start tomcat

sudo /etc/init.d/tomcat6 start
 
Now, you can use your browser to navigate this address:
http://<your ip>:8080
 
And you will see the tomcat It works! page
Usually, HTTP server works with the port 80, but the default port for tomcat is 8080, that is why we need specify 8080 after your ip address. To change the default port from 8080 to 80, type the following command in the terminal:

sudo vim /etc/tomcat6/server.xml

Find the line contains the following content:
<Connector port="8080"  protocol=...

Change it to
<Connector port="80"  protocol=...

Now restart your tomcat server, you will find the following error if you browse your tomcat log in /var/log/tomcat6/catalina_<your date>.log:
SEVERE: Error starting endpoint

java.net.BindException: Permission denied <null>:80

This is because you dont have the permission to use the port number lower than 1024 in ubuntu. To make it happen, open the /etc/default/tomcat6 file:
sudo vim /etc/default/tomcat6
Find the text:
# If you run Tomcat on port numbers that are all higher than 1023, then you 
# do not need authbind.  It is used for binding Tomcat to lower port numbers.
# NOTE: authbind works only with IPv4.  Do not enable it when using IPv6.
# (yes/no, default: no)
#AUTHBIND=no

uncomment the last line and change it to
AUTHBIND=yes

Save it, and restart your tomcat
sudo /etc/init.d/tomcat6 start

Now you can access your server with the address:
http://<your ip>

Bu blogdaki popüler yayınlar

About Android padding, margin, width, height, wrap_content, match_parent, R Class

Padding and Margin padding  and  layout_margin  are two very similar attributes. Both determine the space around a View. The difference is that  padding  determines space within the boundaries of the view, and  layout_margin  determines the space outside the boundaries of the view. Width and Height Some of the most important properties are the width property and height property - those must be defined for every view. Remember that all views occupy a rectangular area on the screen - the width and height are the width and height of that area. You can define this in pixels, or better yet dp (stands for density-independent pixels): android:layout_width="200dp" android:layout_height="300dp" For the sake of having a layout be responsive and adjust to different devices, two common values are not numbers at all, but  wrap_content  and  match_parent  used as shown here: android:layout_width="wrap_content" android:layout_height="match_parent"
Devamı

@SerializedName and @Expose annotations

The  @SerializedName  annotation is needed for Gson to map the JSON keys with our fields. In keeping with Java's camelCase naming convention for class member properties, it is not recommended to use underscores to separate words in a variable.  @SerializedName  helps translate between the two. @SerializedName ( "quota_remaining" ) @Expose private Integer quotaRemaining; In the example above, we are telling Gson that our JSON key  quota_remaining  should be mapped to the Java field  quotaRemaining .  If both of these values were the same, i.e. if our JSON key was  quotaRemaining  just like the Java field, then there would be no need for the  @SerializedName  annotation on the field because Gson would map them automatically. The  @Expose  annotation indicates that this member should be exposed for JSON serialization or deserialization. 
Devamı