This code will give the first part, but how to remove it, and get the whole string without the first part?
echo \"first second third etc\"|cut -d \" \" -f1
Try doing this :
echo "first second third etc"|cut -d " " -f2-
It's explained in
man cut | less +/N-
N- from N'th byte, character or field, to end of line
As far of you have the bash tag, you can use bash parameter expansion like this :
x="first second third etc" echo ${x#* }