I have installed liferay-portal-tomcat-6.1.2-ce-ga3-20130816114619181.zip and liferay-plugins-sdk-6.1.1-20130816114619181.zip in same path say "/home/sim/Desktop/LR". And tried to install SDK plugin from http://www.liferay.com/documentation/liferay-portal/6.1/development/-/ai/installing-the-sdk
When i tried to create portlet
 /Desktop/LR/liferay-plugins-sdk-6.1.1/portlets$ ./create.sh newportlet "My New Portlet" 
   Buildfile: /home/sim/Desktop/LR/liferay-plugins-sdk-6.1.1/portlets/build.xml
   [get] Getting: http://repo2.maven.org/maven2/org/apache/ivy/ivy/2.3.0/ivy-2.3.0.jar
 [get] To: /home/sim/Desktop/LR/liferay-plugins-sdk-6.1.1/.ivy/ivy-2.3.0.jar
then i manually dowloded file ivy-2.3.0.jar
  wget  http://repo2.maven.org/maven2/org/apache/ivy/ivy/2.3.0/ivy-2.3.0.jar--2013-09-25 15:15:00--  http://repo2.maven.org/maven2/org/apache/ivy/ivy/2.3.0/ivy-2.3.0.jar
  Resolving www-proxy.ericsson.se (www-proxy.ericsson.se)... 153.88.253.150
  Connecting to www-proxy.ericsson.se (www-proxy.ericsson.se)|153.88.253.150|:8080... connected.
  Proxy request sent, awaiting response... 200 OK
  Length: 1222059 (1.2M) [application/java-archive]
  Saving to: `ivy-2.3.0.jar'
    100%[=====================================================================================================>] 1,222,059    204K/s   in 5.9s    
  2013-09-25 15:15:06 (203 KB/s) - `ivy-2.3.0.jar' saved [1222059/1222059]
Then i again ran
 /Desktop/LR/liferay-plugins-sdk-6.1.1/portlets$ ./create.sh newportlet "My New Portlet"
Getting No error... It got stuck here..
  Buildfile: /home/sim/Desktop/LR/liferay-plugins-sdk-6.1.1/portlets/build.xml
  [ivy:resolve] :: Apache Ivy 2.3.0 - 20130110142753 :: http://ant.apache.org/ivy/ ::
  [ivy:resolve] :: loading settings :: file = /home/sim/Desktop/LR/liferay-plugins-sdk-6.1.1/ivy-settings.xml
Anyone help me to resolve this issue.