How to enable the ssh service for Ubuntu11.04 in vmwarevm

Virtual Machine System: ProductVMware@WorkstationVersion7.1.3build-324285 Virtual Machine System Ubuntu11.04 host system: MicrosoftWindowsXPProfessional version 2002ServicePack3Ubuntu in Beijing Jiao Tong University image download, fast http://mirror.bjtu.edu.cn/

Virtual Machine System:
Product VMware @ Workstation
Version 7.1.3 build-324285
Virtual Machine system Ubuntu 11.04
Host system: Microsoft Windows XP Professional 2002 Service Pack 3
Ubuntu image download at Beijing Jiao Tong University, fast http://mirror.bjtu.edu.cn/ubuntu-releases/
After Ubuntu 11.04 is installed on the VM, first update the source:
The source of Ubuntu 11.04 education network is as follows:

# University of Electronic Science and Technology

Deb http://ubuntu.uestc.edu.cn/ubuntu/ natty main restricted universe multiverse
Deb http://ubuntu.uestc.edu.cn/ubuntu/ natty-backports main restricted universe multiverse
Deb http://ubuntu.uestc.edu.cn/ubuntu/ natty-proposed main restricted universe multiverse
Deb http://ubuntu.uestc.edu.cn/ubuntu/ natty-security main restricted universe multiverse
Deb http://ubuntu.uestc.edu.cn/ubuntu/ natty-updates main restricted universe multiverse
The deb-src http://ubuntu.uestc.edu.cn/ubuntu/ natty main restricted universe multiverse
Deb-src http://ubuntu.uestc.edu.cn/ubuntu/ nat-backports main restricted universe multiverse
Deb-src http://ubuntu.uestc.edu.cn/ubuntu/ nat-proposed main restricted universe multiverse
Deb-src http://ubuntu.uestc.edu.cn/ubuntu/ natty-security main restricted universe multiverse
Deb-src http://ubuntu.uestc.edu.cn/ubuntu/ natty-updates main restricted universe multiverse

# Emy of Science and Technology

Deb http://debian.ustc.edu.cn/ubuntu/ natty main restricted universe multiverse
Deb http://debian.ustc.edu.cn/ubuntu/ natty-backports restricted universe multiverse
Deb http://debian.ustc.edu.cn/ubuntu/ natty-proposed main restricted universe multiverse
Deb http://debian.ustc.edu.cn/ubuntu/ natty-security main restricted universe multiverse
Deb http://debian.ustc.edu.cn/ubuntu/ natty-updates main restricted universe multiverse
The deb-src http://debian.ustc.edu.cn/ubuntu/ natty main restricted universe multiverse
Deb-src http://debian.ustc.edu.cn/ubuntu/ nat-backports main restricted universe multiverse
Deb-src http://debian.ustc.edu.cn/ubuntu/ nat-proposed main restricted universe multiverse
Deb-src http://debian.ustc.edu.cn/ubuntu/ natty-security main restricted universe multiverse
Deb-src http://debian.ustc.edu.cn/ubuntu/ natty-updates main restricted universe multiverse

# Beijing Institute of Technology

Deb http://mirror.bjtu.edu.cn/ubuntu/ natty main multiverse restricted universe
Deb http://mirror.bjtu.edu.cn/ubuntu/ natty-backports main multiverse restricted universe
Deb http://mirror.bjtu.edu.cn/ubuntu/ natty-proposed main multiverse restricted universe
Deb http://mirror.bjtu.edu.cn/ubuntu/ natty-security main multiverse restricted universe
Deb http://mirror.bjtu.edu.cn/ubuntu/ natty-updates main multiverse restricted universe
Deb-src http://mirror.bjtu.edu.cn/ubuntu/ natty main multiverse restricted universe
Deb-src http://mirror.bjtu.edu.cn/ubuntu/ nat-backports main multiverse restricted universe
Deb-src http://mirror.bjtu.edu.cn/ubuntu/ nat-proposed main multiverse restricted universe
Deb-src http://mirror.bjtu.edu.cn/ubuntu/ natty-security main multiverse restricted universe
Deb-src http://mirror.bjtu.edu.cn/ubuntu/ natty-updates main multiverse restricted universe

# Lanzhou University

Deb ftp://mirror.lzu.edu.cn/ubuntu/ natty main multiverse restricted universe
Deb ftp://mirror.lzu.edu.cn/ubuntu/ natty-backports main multiverse restricted universe
Deb ftp://mirror.lzu.edu.cn/ubuntu/ natty-proposed main multiverse restricted universe
Deb ftp://mirror.lzu.edu.cn/ubuntu/ natty-security main multiverse restricted universe
Deb ftp://mirror.lzu.edu.cn/ubuntu/ natty-updates main multiverse restricted universe
Deb ftp://mirror.lzu.edu.cn/ubuntu-cn/ natty main multiverse restricted universe

# Shanghai Jiao Tong University

Deb http://ftp.sjtu.edu.cn/ubuntu/ natty main multiverse restricted universe
Deb http://ftp.sjtu.edu.cn/ubuntu/ natty-backports main multiverse restricted universe
Deb http://ftp.sjtu.edu.cn/ubuntu/ natty-proposed main multiverse restricted universe
Deb http://ftp.sjtu.edu.cn/ubuntu/ natty-security main multiverse restricted universe
Deb http://ftp.sjtu.edu.cn/ubuntu/ natty-updates main multiverse restricted universe
Deb http://ftp.sjtu.edu.cn/ubuntu-cn/ natty main multiverse restricted universe
Deb-src http://ftp.sjtu.edu.cn/ubuntu/ natty main multiverse restricted universe
Deb-src http://ftp.sjtu.edu.cn/ubuntu/ nat-backports main multiverse restricted universe
Deb-src http://ftp.sjtu.edu.cn/ubuntu/ nat-proposed main multiverse restricted universe
Deb-src http://ftp.sjtu.edu.cn/ubuntu/ natty-security main multiverse restricted universe
Deb-src http://ftp.sjtu.edu.cn/ubuntu/ natty-updates main multiverse restricted universe

# Netease Resources

Deb http://mirrors.163.com/ubuntu/ natty main restricted universe multiverse
Deb http://mirrors.163.com/ubuntu/ natty-security main restricted universe multiverse
Deb http://mirrors.163.com/ubuntu/ natty-updates main restricted universe multiverse
Deb http://mirrors.163.com/ubuntu/ natty-proposed main restricted universe multiverse
Deb http://mirrors.163.com/ubuntu/ natty-backports main restricted universe multiverse
The deb-src http://mirrors.163.com/ubuntu/ natty main restricted universe multiverse
Deb-src http://mirrors.163.com/ubuntu/ natty-security main restricted universe multiverse
Deb-src http://mirrors.163.com/ubuntu/ natty-updates main restricted universe multiverse
Deb-src http://mirrors.163.com/ubuntu/ nat-proposed main restricted universe multiverse
Deb-src http://mirrors.163.com/ubuntu/ nat-backports main restricted universe multiverse