Hi, dwarf007
>[root@TYJ rpm packages]# rpm -ivh libgd-devel-1.3-4.i386.rpm
>Preparing... (100########################################### [100%]
>package libgd-devel-1.3-4 is already installed
u can check whether that package is installed or not.
# rpm -qa | grep
package-name
For example:
# rpm -qa | grep libgd
>[root@TYJ rpm packages]# rpm -e libgd-devel-1.3-4.i386.rpm
>error: package libgd-devel-1.3-4.i386.rpm is not installed
>
>Why it still shows not install after i installed the package??
Maybe, "rpm -e" argument is wrong

When rpm package is removed, cpu-architecrure and extension are not necessary.
In this case, the following command is correct:
# rpm -e libgd-devel-1.3-4
Good luck!!