New to ros.

edit

I am trying to go through tutorial to create a new package in current directory which is i think ROS, but getting following mistake,can someone help me out in this

shailendraparihar@ubuntu:/opt/ros/electric/ros$ roscreate-pkg beginner_tutorials std_msgs rospy roscpp
Traceback (most recent call last):
  File "/opt/ros/electric/ros/bin/roscreate-pkg", line 35, in <module>
    roscreate.roscreatepkg.roscreatepkg_main()
  File "/opt/ros/electric/ros/tools/roscreate/src/roscreate/roscreatepkg.py", line 126, in roscreatepkg_main
    create_package(package, author_name(), depends, uses_roscpp=uses_roscpp, uses_rospy=uses_rospy)
  File "/opt/ros/electric/ros/tools/roscreate/src/roscreate/roscreatepkg.py", line 63, in create_package
    os.makedirs(p)
  File "/usr/lib/python2.6/os.py", line 157, in makedirs
    mkdir(name, mode)
OSError: [Errno 13] Permission denied: '/opt/ros/electric/ros/beginner_tutorials'