Install CUDA 9.1 on Ubuntu 16.04 logfile command not found

When I run the installation the prompt reads, “The driver installation has failed due to an unkown error. Please consult the driver installation log”

Upon accessing the log file, it reads,
"
/var/log/nvidia-installer.log:1: nvidia-installer: command not found
/var/log/nvidia-installer.log:2: creation: command not found
/var/log/nvidia-installer.log:3: installer: command not found
/var/log/nvidia-installer.log:5: PATH:: command not found
/var/log/nvidia-installer.log:7: nvidia-installer: command not found
/var/log/nvidia-installer.log:8: ./nvidia-installer: No such file or directory
/var/log/nvidia-installer.log:9: --ui=none: command not found
/var/log/nvidia-installer.log:10: --no-questions: command not found
/var/log/nvidia-installer.log:11: --accept-license: command not found
/var/log/nvidia-installer.log:12: --disable-nouveau: command not found
/var/log/nvidia-installer.log:13: --run-nvidia-xconfig: command not found
/var/log/nvidia-installer.log:14: --dkms: command not found
/var/log/nvidia-installer.log:16: Using: command not found
/var/log/nvidia-installer.log:17: -: command not found
/var/log/nvidia-installer.log:17: setting: command not found
/var/log/nvidia-installer.log:18: -: command not found
/var/log/nvidia-installer.log:19: -: command not found
/var/log/nvidia-installer.log:20: -: command not found
/var/log/nvidia-installer.log:21: executing:: command not found
/var/log/nvidia-installer.log:22: -: command not found
/var/log/nvidia-installer.log:23: syntax error near unexpected token (' /var/log/nvidia-installer.log:23: -> The distribution-provided pre-install script failed! Are you sure you want to continue? (Answer: Continue installation)

"

Where am I going wrong?