/opt/bin # ldd /opt/bin/opkg
        linux-vdso.so.1 (0x0000007fae9c2000)
        libgcc_s.so.1 => /opt/lib/libgcc_s.so.1 (0x0000007fae971000)
        libc.so.6 => /opt/lib/libc.so.6 (0x0000007fae816000)
        /opt/lib/ld-linux-aarch64.so.1 (0x0000007fae996000)
/opt/bin # cp /opt/bin/opkg /opt/bin/opkg1
/opt/bin # opkg install --force-reinstall opkg
Removing package opkg from root...
Installing opkg (2019-01-31-d4ba162b-1) to root...
Downloading http://bin.entware.net/aarch64-k3.10/opkg_2019-01-31-d4ba162b-1_aarch64-3.10.ipk
Configuring opkg.
/opt/bin # ldd /opt/bin/opkg
        linux-vdso.so.1 (0x0000007f85135000)
        libpthread.so.0 => /opt/lib/libpthread.so.0 (0x0000007f850dc000)
        libgcc_s.so.1 => /opt/lib/libgcc_s.so.1 (0x0000007f850b7000)
        libc.so.6 => /opt/lib/libc.so.6 (0x0000007f84f5c000)
        /opt/lib/ld-linux-aarch64.so.1 (0x0000007f85109000)
/opt/bin # cp -f cp /opt/bin/opkg1 /opt/bin/opkg
cp: can't stat '/opt/bin/opkg/cp': Not a directory
cp: can't stat '/opt/bin/opkg/opkg1': Not a directory
/opt/bin # cp -f /opt/bin/opkg1 /opt/bin/opkg
/opt/bin # rm /opt/bin/opkg1
/opt/bin #