The output ls -l /bin/aws
shows:
-rw-r--r--. 1 root root 814 Oct 22 18:09 /bin/aws
This means that you have read / write permissions but no execute permissions. To fix this, you should run chmod as follows:
chmod 755 /bin/aws
After that, the output ls -l /bin/aws
should show:
-rwxr-xr-x. 1 root root 814 Oct 22 18:09 /bin/aws
x
, . . , .