sudo -u postgres not working in mac os x

Question

I have recently installed postgresql 9.1 after uninstalling postgres 9.3 as per the requirement of my project but I am not able to run basic sudo command with postgres user.

sudo -u postgres -h localhost createdb template_postgis

This gives me no error but shows the usage of sudo:

usage: sudo -h | -K | -k | -L | -V
usage: sudo -v [-AknS] [-g groupname|#gid] [-p prompt] [-u user name|#uid]
usage: sudo -l[l] [-AknS] [-g groupname|#gid] [-p prompt] [-U user name] [-u
        user name|#uid] [-g groupname|#gid] [command]
usage: sudo [-AbEHknPS] [-C fd] [-g groupname|#gid] [-p prompt] [-u user
        name|#uid] [-g groupname|#gid] [VAR=value] [-i|-s] [<command>]
usage: sudo -e [-AknS] [-C fd] [-g groupname|#gid] [-p prompt] [-u user
        name|#uid] file ...

Though sudo works for other projects and commands but not in this. It was working earlier perfectly. I will be really thankful if someone helps.

Answer 1

In the manual page for sudo (which you can view by running man sudo in the terminal), you can see that this is exactly what the -h option does:

   -h          The -h (help) option causes sudo to print a usage message and exit.

You should be able to run the command without that option:

sudo -u postgres createdb template_postgis