我希望能够在apt-get upgrade没有提示的情况下无缝运行脚本，但在我的实验中，我无法让它停止显示提示，即使使用-y或--force yes。最近，当从头开始设置 RPis 时，这是一个示例，我只需点击q即可继续升级：
ca-certificates (20141019+deb8u2) stable; urgency=medium
Update Mozilla certificate authority bundle to version 2.9.
The following certificate authorities were added (+):
+ "Certplus Root CA G1"
+ "Certplus Root CA G2"
+ "Certum Trusted Network CA 2"
+ "Hellenic Academic and Research Institutions ECC RootCA 2015"
+ "Hellenic Academic and Research Institutions RootCA 2015"
+ "ISRG Root X1"
+ "OpenTrust Root CA G1"
+ "OpenTrust Root CA G2"
+ …