john@Betsy03-AsusK52F:~/chdkptp/chdkptp-r795$ ldd chdkptp
linux-gate.so.1 => (0xf7788000)
libusb-0.1.so.4 => /lib/i386-linux-gnu/libusb-0.1.so.4 (0xf7762000)
libm.so.6 => /lib/i386-linux-gnu/libm.so.6 (0xf770d000)
libdl.so.2 => /lib/i386-linux-gnu/libdl.so.2 (0xf7707000)
libreadline.so.6 => not found
libhistory.so.6 => not found
libc.so.6 => /lib/i386-linux-gnu/libc.so.6 (0xf7551000)
/lib/ld-linux.so.2 (0x565dc000)
john@Betsy03-AsusK52F:~/chdkptp/chdkptp-r795$ ls -l /lib/x86_64-linux-gnu/libusb*
lrwxrwxrwx 1 root root 19 Dec 23 11:58 /lib/x86_64-linux-gnu/libusb-0.1.so.4 -> libusb-0.1.so.4.4.4
-rw-r--r-- 1 root root 30944 Jan 8 2016 /lib/x86_64-linux-gnu/libusb-0.1.so.4.4.4
lrwxrwxrwx 1 root root 19 Dec 23 11:58 /lib/x86_64-linux-gnu/libusb-1.0.so.0 -> libusb-1.0.so.0.1.0
-rw-r--r-- 1 root root 97056 Oct 23 2015 /lib/x86_64-linux-gnu/libusb-1.0.so.0.1.0
As far as sudo goes. I am a bit new to Ubuntu so if something doesn't work it gets sudo at the front. Most of the time it helps.