Windows7 remote login ubuntu12.04 (PuTTY implementation)

I have seen some information before that ubuntu installs ssh by default, and I installed an ssh myself, and after installation, I saw that the ssh service has started. In short, the purpose is to have an ssh service, and it has already started. If it is not installed, install one first. If the service is not started, start it. Since I have already started, I have not considered this problem. About starting the ssh service, the information I see on the Internet is:

wahaha@ubuntu-K55VD:~$ /etc/init.d/ssh start to install an ssh server, my approach is to enter ssh in the terminal , then press the Tab key to complete and choose to install the server. 
 
wahaha@ubuntu-K55VD:~$ sudo apt-get install sshssh ssh-contact-service ssh-krb5ssh-askpass sshfp sshmssh-askpass-fullscreen sshfs sshmenussh-askpass-gnome sshfs-dbg sshpassssh- Contact sshguard sshuttlessh-contact-client ssh-import-id wahaha@ubuntu-K55VD:~$ sudo apt-get install ssh-contact-service I enter the password to install. 
[sudo] password for wahaha: reading the list of packages... Completing the dependency tree for the parsing package is reading status information... The following additional packages will be installed: openssh-server ssh -import-id Suggested packages: rssh molly-guard openssh-blacklist openssh-blacklist-extra monkeysphere The following [new] packages will be installed: openssh-server ssh-contact-service ssh-import-id upgraded 0 The package has 3 new packages installed. To uninstall 0 packages, 0 packages have not been upgraded. Need to download the 352 kB package. After decompressing, it consumes 944 kB of extra space. Do you wish to continue? [Y/n]y get: 1 http://cn.archive.ubuntu.com/ubuntu/precise-updates/main openssh-server amd64 1:5.9p1-5ubuntu1.3 [338 kB]Get: 2 http://cn.archive.ubuntu.com/ubuntu/precision/universe ssh-contact-service amd64 0.6-1build1 [7,476 B]Get: 3 http://cn.archive.ubuntu.com/ubuntu/precise/main ssh-import -id all 2.10-0ubuntu1 [6,598 B]Download 352 kB, takes 1 second (314 kB/s) is pre-configured package...Selecting previously unselected package openssh-server.(Reading database... System There are currently 320267 files and directories installed.) The openssh-server is being decompressed (from.../openssh-server_1%3a5.9p1-5ubuntu1.3_amd64.deb)...Selecting previously unselected package ssh-contact-service. Unzipping ssh-contact-service (from.../ssh-contact-service_0.6-1build1_amd64.deb) ...Selecting previously unselected package ssh-import-id. Extracting ssh-import-id (from. ../ssh-import-id_2.10-0ubuntu1_all.deb) ...processing triggers for man-db... processing triggers for ureadahead ... is processing the trigger for ufw... setting openssh-server (1:5.9p1-5ubuntu1.3) ...Creating SSH2 RSA key; this may take some time ...Creating SSH2 DSA key; This may take some time ...Creating SSH2 ECDSA key; this may take some time ...ssh start/running, process 27543 is setting ssh-contact-service (0.6-1build1) ... is setting ssh-import-id (2.10-0ubuntu1) ...wahaha@ubuntu-K55VD:~$
 After I checked if the ssh service was started, according to the information displayed, I have already started. 
wahaha@ubuntu-K55VD:~$ ps -e