graphic mode

hi im sachin

i have install ubuntu linux but i have faching some proamble

1) how to move text mode to graphic mode
i 'm using startx command,but getting remark
"apt-get install xinit"
2) using alt+cont+f7 cant gettting reply

ple

slove this query

thanks 7 regds
sachin
gajbhiye.sachin22@gmail.com