how to know whether to upgrade the debian GNU/linux ?

All of are interested to keep our system updated and secured.
There are many ways to update the system.
In order to update the system packages we run :

# aptitude update

In the output of the above command we can know whether system can be upgraded to install security or update packages. At the end of the execution command, you can view the following line :

current status : 1 update [+1].

If the above line is present, we can upgrade the system.
In the picture below, view the line highlighted in colour.

This is how we know whether system can be upgraded.

The End.
 
 

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