ubuntu makinenizde disk kullanımını görmek istediğiniz zaman df -h sudo apt-get install pydf pydf  

Directory does not exist: /usr/include/x86_64-linux-gnu/ Directory does not exist: /usr/include/c++/ Directory does not exist: /usr/include/x86_64-linux-gnu/c++/ sudo apt-get install –reinstall g++  

sudo firewall-cmd --zone=public --add-port=55555/tcp --permanent