Ubuntu 14.04 我收到一个错误
sudo apt-get update
###other stuff###
Err https://cran.mtu.edu trusty/ Packages
server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none
gpg --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys E084DAB9
gpg: requesting key E084DAB9 from hkp server keyserver.ubuntu.com
gpg: key E084DAB9: "Michael Rutter <[email protected]>" not changed
gpg: Total number processed: 1
gpg: unchanged: 1
gpg -a --export E084DAB9 | sudo apt-key add -
OK
sudo apt-get install r-base
Reading package lists... Done
Building dependency tree
Reading state information... Done
r-base is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 152 not upgraded.
但....
~$ R
R version 3.0.2 (2013-09-25) -- "Frisbee Sailing"
Copyright (C) 2013 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)
这些似乎是https://cran.r-project.org/bin/linux/ubuntu/README以及各种博客文章
答案1
我用于更新 R 和 CRAN 包的方法是添加 Michael Rutter 的 PPA（CI-Travis 也使用）：
sudo add-apt-repository ppa:marutter/rrutter
sudo add-apt-repository ppa:marutter/c2d4u
sudo apt-get update
sudo apt-get upgrade