LinuxQuestions.org - How to add an entry to a file?

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How to add an entry to a file?

I am new to linux and while installing Docker https://docs.docker.com/engine/insta...x/ubuntulinux/ I got stuck at step 7.

So I am trying to add deb https://apt.dockerproject.org/repo ubuntu-wily main to the docker.list file I created yet nothing seems to work the way it should.

I tried this: http://www.cyberciti.biz/faq/unix-li...ext-to-a-file/
and this: http://unix.stackexchange.com/questi...-the-last-line
and several more yet the closest I get is:

Code:

mitja@mitja-N73SV:/etc/apt/sources.list.d$ sudo echo 'deb https://apt.dockerproject.org/repo ubuntu-wily main' >>docker.list

bash: docker.list: Permission denied

are you trying to add an entry to a file?

Quote:

Open the file in your favorite editor.

$ sudo geany <or your favorite editor> /etc/apt/sources.list.d/docker.list
If the file doesn’t exist, create it.

Remove any existing entries.

Add an entry for your Ubuntu operating system.

Quote:

as you see here you have NO editor with root privileges
right here

Code:

mitja@mitja-N73SV:/etc/apt/sources.list.d$ sudo echo 'deb https://apt.dockerproject.org/repo ubuntu-wily main' >>docker.list

bash: docker.list: Permission denied