root@host [/home1]# cp -f hello /home3
cp: omitting directory `hello'
root@host [/home1]# cp -rf hello /home3
cp: overwrite `/home3/hello/.buildpath'? y
cp: overwrite `/home3/hello/.bash_logout'? y
cp: overwrite `/home3/hello/.project'? ^C

root@host [/home1]# cp -rf hello /home3
cp: overwrite `/home3/hello/.buildpath'? y
cp: overwrite `/home3/hello/.bash_logout'? y
cp: overwrite `/home3/hello/.project'? ^C
root@host [/home1]# cp -force hello /home3
cp: invalid option -- 'o'
Try `cp --help' for more information.
root@host [/home1]# cp --remove-destination hello /home4
cp: omitting directory `hello'
root@host [/home1]# cp --remove-destination hello /home3
cp: omitting directory `hello'
root@host [/home1]# cp --remove-destination -r hello /home3
cp: overwrite `/home3/hello/.buildpath'? ^C
root@host [/home1]#

unalias cp
unset -f cp

command cp [...]