sir thanks for your concern. obviously i am new on linux but i did study to know more. the first link- i kno abt all these a bit.2nd link- i hav no idea what is in there. . i kno how to run yamas with ettercap and arpspoof and how to sniif passwords and website information (as shown in the video by torpedo). i kno these things are very easy for you guys but i really got surprised when i saw that a phone could do all these. i then heard about dnsspoof. all i kno is that dnsspoof can redirect hosts to another website and can even block users from visiting particular sites. i need this for my office due to security purpose. its a small institution and thats why i dont want to hire linux professionals. in this process i will get to learn also. maybe i couldnt edit the etter.dns file. maybe i need more help on how to edit that file. this is what i did:

1) found the ip address of the website with nslookup www.google.com. and entered the ip in the /usr/share/ettercap/etter.dns. (below where its written microsoft.com) : i followed few youtube videos.
2) opened yamas with yamas-e since i dont kno how to run ettercap seperately. i guess thats okay.
3) then i typed in another xterm window. - ettercap -T -q -M arp:remote -P dns_spoof.
i got activating dnsspoof plugin. thats it. but the redirecting dint happen. i thing i messed it up in editing the /usr/share/ettercap/etter.dns file.

so a step by step guide would be helpful if there is no problem. . thnx in advance