In computers based on a Debian operating system that uses Linux kernel, error messages similar to NO_PUBKEY may appear. This happens while using the Apt-Get command line tool, and this error is associated with the tool's update feature. This problem can be solved by simply keying in the appropriate commands. To solve the Apt-get : NO_PUBKEY / GPG error in Debian, simply type the following commands
![How to fix Debian Apt-get : NO_PUBKEY / GPG error](https://cdn-ak-scissors.b.st-hatena.com/image/square/f2e0f2cf55e8e020325586e92c2a1e86271a43dd/height=288;version=1;width=512/https%3A%2F%2Fimg-19.ccm.net%2FA3susI-AU-BwcXNkQ8wXmc7kIIg%3D%2F1500x%2Fsmart%2F41f322197b684fb18a2156e6093e5ea6%2Fccmcms-enccm%2F32699346.jpg)