azat@pc:~/.rvm$ rvm install ruby 2.2.3

Searching for binary rubies, this might take some time.
No binary rubies available for: ubuntu/15.04/x86_64/ruby-2.2.3.

Continuing with compilation. Please read 'rvm help mount' to get more information on binary rubies.
Checking requirements for ubuntu.

Installing requirements for ubuntu.
Updating system.....................................

Error running 'requirements_debian_update_system ruby-2.2.3',
showing last 15 lines of /home/azat/.rvm/log/1443102720_ruby-2.2.3/update_system.log
++ case "${TERM:-dumb}" in
++ case "$1" in
++ [[ -t 2 ]]
++ return 1
++ printf %b 'There has been error while updating '\''apt-get'\'', please give it some time and try again later.

404 errors should be fixed for rvm to proceed. Check your sources configured in:
    /etc/apt/sources.list
    /etc/apt/sources.list.d/*.list
\n'
There has been error while updating 'apt-get', please give it some time and try again later.

404 errors should be fixed for rvm to proceed. Check your sources configured in:
    /etc/apt/sources.list
    /etc/apt/sources.list.d/*.list

++ return 100
Requirements installation failed with status: 100.