Installing WSP file using STSADM

 First open command prompt "run as administrator"

cd "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\BIN"

 Then we can execute these commands....

1. Add the solution
stsadm -o addsolution -filename {WSPFILENAME}
2. Deploy the solution
stsadm -o deploysolution -name {WSPFILENAME} -url {SITEURL}
3. Install the feature
stsadm -o installfeature -filename {FeatureFolder}\feature.xml
4. Activate the feature
stsadm -o activatefeature -id {FEATUREID} -url {SITEURL} -force
5. Deactive the feature
Stsadm.exe -o deactivatefeature -filename “C:\Program Files\Common Files\Microsoft Shared\web server extensions\12\TEMPLATE\FEATURES\ViewFormPagesLockDown\feature.xml” -ur http://servername/
6.Uninstall the feature
stsadm -o uninstallfeature -filename
7.Retract Solution
stsadm -o retractsolution
-name
[-url]
[-allcontenturls]
[-time]
[-immediate]
8.Delete Solution
stsadm -o deletesolution
-name

Web Part / Solution Deployment

There are may ways to deploy the Sharepoint solutions depending on the environment. if you have .wsp package ready and you want to deploy it to some sharepoint Server where visual studio is not availabe to deploy it, the following Power shell script can be useful....
follow the steps bellow.

go to START==>>All Programs==>>Microsoft SharePoint 2010 Products==>>SahrePoint 2010 management Shell.(Run it as Administrator)
to deploy particular solution run the following power shell command

Add-SPSolution "D:\WebPartZone\Eventproject_SO.wsp"
3.after deploying the solution to enable it to particular Web Application run the following command with proper web app URL.
Install-SPSolution –Identity "Eventproject_SO.wsp" –WebApplication "Url" -GACDeployment