[CMake] Installing CMake in Ubuntu Linux from command-line via wget

[Ian Cullen]

If you want to stick to your original method you need to add some 
command line arguments to tar to tell it that is is extracting a 
compressed file.

The binary is then available within the extracted directory.

Original command becomes:

RUN wget https://cmake.org/files/v3.12/cmake-3.12.3-Linux-x86_64.tar.gz  \
    && tar xzf cmake-3.12.3-Linux-x86_64.tar.gz  \
    && rm -rf cmake-3.12.3-Linux-x86_64.tar.gz  \
    && cd cmake-3.12.3-Linux-x86_64  \
    && ./bin/cmake --version


tar options:
x - Extract
z - Archive type is gzip (may be optional, depending on version of tar)
f - The file to extract (tar will try and open whatever follows this 
argument so it MUST come last in this case)



On 30/10/2018 09:27, Mateusz Loskot wrote:
> On Tue, 30 Oct 2018 at 10:22, Osman Zakir <osmanzakir90 at hotmail.com> wrote:
>> I want to install the latest release version of CMake in my Ubuntu Docker image (from the Dockerfile), but I'm having trouble.  I have this command:
>>
>> "
>> RUN wget https://cmake.org/files/v3.12/cmake-3.12.3-Linux-x86_64.tar.gz  \
>>     && tar cmake-3.12.3-Linux-x86_64.tar.gz  \
>>     && rm -rf cmake-3.12.3-Linux-x86_64.tar.gz  \
>>     && cd cmake-3.12.3-Linux-x86_64  \
>>     && apt-get install
> Hmm, are you cerctain apt-get is capable of installing from .tar.gz?
>
> wget -O cmake-linux.sh
> https://cmake.org/files/v3.12/cmake-3.12.3-Linux-x86_64.sh
> sudo sh cmake-linux.sh -- --skip-license --prefix=/usr/local
> cmake --version
>
> I guess, it may be a good idea to update https://cmake.org/install/
>
> Best regards,,