pavlos55@pavlos55-SATELLITE-S50-B:~/myapp$ rails server
/home/pavlos55/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/app_rails_loader.rb:39: warning: Insecure world writable dir /home in PATH, mode 040777
/home/pavlos55/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/shared_helpers.rb:78: warning: Insecure world writable dir /home in PATH, mode 040777
=> Booting WEBrick
=> Rails 4.2.4 application starting in development on http://localhost:3000
=> Run `rails server -h` for more startup options
=> Ctrl-C to shutdown server
Rails Error: Unable to access log file. Please ensure that /home/pavlos55/myapp/log/development.log exists and is writable (ie, make it writable for user and group: chmod 0664 /home/pavlos55/myapp/log/development.log). The log level has been raised to WARN and the output directed to STDERR until the problem is fixed.
Exiting
/home/pavlos55/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/server.rb:354:in `initialize': Permission denied @ rb_sysopen - /home/pavlos55/myapp/tmp/pids/server.pid (Errno::EACCES)
	from /home/pavlos55/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/server.rb:354:in `open'
	from /home/pavlos55/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/server.rb:354:in `write_pid'
	from /home/pavlos55/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/server.rb:276:in `start'
	from /home/pavlos55/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/commands/server.rb:80:in `start'
	from /home/pavlos55/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:80:in `block in server'
	from /home/pavlos55/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:75:in `tap'
	from /home/pavlos55/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:75:in `server'
	from /home/pavlos55/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
	from /home/pavlos55/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/commands.rb:17:in `<top (required)>'
	from /home/pavlos55/myapp/bin/rails:8:in `require'
	from /home/pavlos55/myapp/bin/rails:8:in `<top (required)>'
	from /home/pavlos55/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/spring-1.4.0/lib/spring/client/rails.rb:28:in `load'
	from /home/pavlos55/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/spring-1.4.0/lib/spring/client/rails.rb:28:in `call'
	from /home/pavlos55/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/spring-1.4.0/lib/spring/client/command.rb:7:in `call'
	from /home/pavlos55/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/spring-1.4.0/lib/spring/client.rb:28:in `run'
	from /home/pavlos55/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/spring-1.4.0/bin/spring:49:in `<top (required)>'
	from /home/pavlos55/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/spring-1.4.0/lib/spring/binstub.rb:11:in `load'
	from /home/pavlos55/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/spring-1.4.0/lib/spring/binstub.rb:11:in `<top (required)>'
	from /home/pavlos55/.rbenv/versions/2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	from /home/pavlos55/.rbenv/versions/2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
	from /home/pavlos55/myapp/bin/spring:13:in `<top (required)>'
	from bin/rails:3:in `load'
	from bin/rails:3:in `<main>'