This error appears to want to fix the error The following packages have been kept

To fix this error sudo: aptitude: command not found I decided to reinstall the application APTITUDE and then run SAFE-UPGRADE and thus see if the errors still appear dependency. I start to run in the terminal the following commands:

• sudo apt-get update
• sudo apt-get install aptitude
• sudo aptitude safe-upgrade

And then returned to ajecutar:

• sudo apt-get update
• sudo apt-get upgrade

With this check for errors