Passing parameters with Command Link

create a command link and pass arguements. In the apex class you can get the parameters and use the value in your code.

Visual Force Page:

<apex:page controller="showCammand">
<apex:form>
<apex:commandLink id="commandLink" action="{!displayName}" value="Show my name">
<apex:param name="Name" value="myName"/>
</apex:commandLink>
<br/>
My name: {!name}
</apex:form>
</apex:page>

Apex Class:

public class showCammand()
{
public String name {get; set;}
public void displayName()
{
name = ApexPages.CurrentPage().getParameters().get('Name');
}
}