Stop putting yourself in shell mode by with that initial "/opt/local/bin/port ; 
exit;"

Just type sudo port install cairo

-Al-

On Wed, Oct 18, 2017 at 06:07 PM, John wrote:
> Hi, 
> 
>    Thanks for your response, but...
>    It does not work.... 
> 
> 
> Last login: Wed Oct 18 18:03:28 on ttys000
> John-MacBook-Pro:~ miao$ /opt/local/bin/port ; exit;
> MacPorts 2.4.2
> Entering shell mode... ("help" for help, "quit" to quit)
> [Users/john] > sudo /opt/local/bin/port install cairo
> Error: Unrecognized action "port sudo"
> [Users/john] > 
> 
> 
> J
> 
> 2017-10-18 2:36 GMT-07:00 Al Varnell <alvarn...@mac.com 
> <mailto:alvarn...@mac.com>>:
> Type $PATH in Terminal to make certain that /opt/local/bin/ is included. If 
> not then you need to add it or just use: 
> 
> sudo /opt/local/bin/port install cairo.
> 
> -Al-
> 
> On Wed, Oct 18, 2017 at 02:25 AM, John wrote:
>> Hi, 
>> 
>>    I tried to install Cairo graphics 
>> 
>> https://www.cairographics.org/download/ 
>> <https://www.cairographics.org/download/>
>> 
>>    and I need to install Macports. 
>> 
>>    I tried to install Macports on my Mac OS Sierra 10.12.6, and type "sudo 
>> port install cairo", but it did not respond. I haven't seen any file name or 
>> app called Macports, but one file called "port" which is located at
>> 
>> loca/bin/port"
>> 
>>    How should I do it? 
>> 
>>    Thanks,
>> 
>> John

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