更新R后，在CentOS上的R中安装软件包时遇到一些麻烦。这是当我尝试在R中安装软件包时发生的示例：
> install.packages("ggplot2")
Installing package into '/home/albers/R/x86_64-pc-linux-gnu-library/3.2'
(as 'lib' is unspecified)
--- Please select a CRAN mirror for use in this session ---
Error in download.file(url, destfile = f, quiet = TRUE) :
internet routines cannot be loaded
In addition: Warning message:
In download.file(url, destfile = f, quiet = TRUE) :
unable to load shared object '/usr/local/lib64/R/modules//internet.so':
/usr/local/lib64/R/modules//internet.so: undefined symbol: curl_multi_wait
HTTPS CRAN mirror
1: 0-Cloud [https] 2: Austria [https]
3: Chile [https] 4: China (Beijing 4) [https]
5: Colombia (Cali) [https] 6: France (Lyon 2) [https]
7: France (Paris 2) [https] 8: Germany (M▒nster) [https]
9: Iceland [https] 10: Mexico (Mexico City) [https]
11: Russia (Moscow) [https] 12: Spain (A Coru▒a) [https]
13: Switzerland [https] 14: UK (Bristol) [https]
15: UK (Cambridge) [https] 16: USA (CA 1) [https]
17: USA (KS) [https] 18: USA (MI 1) [https]
19: USA (TN) [https] 20: USA (TX) [https]
21: USA (WA) [https] 22: (HTTP mirrors)
Selection: 1
Warning: unable to access index for repository https://cran.rstudio.com/src/contrib:
internet routines cannot be loaded
Warning message:
package 'ggplot2' is not available (for R version 3.2.5)
因此，我花了一些时间搜索错误消息。我更新了curl的最新版本：
$ curl -V
curl 7.48.0 (x86_64-pc-linux-gnu) libcurl/7.48.0 zlib/1.2.8
Protocols: dict file ftp gopher http imap pop3 rtsp smtp telnet tftp
Features: IPv6 Largefile libz UnixSockets
仍然无法安装软件包，并且收到相同的错误消息。所以，我想下面的说明这个帖子，特别是添加下面的命令我.bash_profile：
export LD_LIBRARY_PATH=$TOOLS/curl-7.48.0/lib:$LD_LIBRARY_PATH
同样，我收到关于R无法加载共享对象的相同错误消息。最终，这也是一个下载问题，download.file同样也失败了。这是我的sessionInfo()：
R version 3.2.5 (2016-04-14)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: CentOS release 6.2 (Final)
locale:
[1] LC_CTYPE=en_US.iso885915 LC_NUMERIC=C
[3] LC_TIME=en_US.iso885915 LC_COLLATE=en_US.iso885915
[5] LC_MONETARY=en_US.iso885915 LC_MESSAGES=en_US.iso885915
[7] LC_PAPER=en_US.iso885915 LC_NAME=C
[9] LC_ADDRESS=C LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_US.iso885915 LC_IDENTIFICATION=C
attached base packages:
[1] stats graphics grDevices utils datasets methods base
我能够与下载文件wget和curl但只要我开始R，我无法下载任何东西。
有人对我如何解决此问题有任何建议吗？
这样尝试。
install.packages("ggplot2", repos="http://cran.cnr.berkeley.edu")
或在安装它之前，将下载工具更改为其他工具，即在Linux上，您可以尝试按以下方式尝试wget。
options(download.file.method = "wget")
请注意，我已经放弃了https的http。我有一个类似的错误...
Selection: 1
Warning: unable to access index for repository https://cran.rstudio.com/src/contrib:
unsupported URL scheme
Warning message:
package ‘ggplot2’ is not available (for R version 3.2.3)
如果您从问题中查看以下行的输出...
Yours
Protocols: dict file ftp gopher http imap pop3 rtsp smtp telnet tftp
Mine (Also Centos 6)
Protocols: tftp ftp telnet dict ldap ldaps http file https ftps scp sftp
您curl缺少https支持。curl_multi_wait您的输出中也存在错误。这是在7.28.0中添加的。
https://curl.haxx.se/libcurl/c/curl_multi_wait.html
如果您需要在本地构建curl，请执行此操作
mkdir -p $HOME/curl
cd $HOME/curl
git clone https://github.com/curl/curl.git
cd curl
bash buildconf
./configure --prefix=$HOME/libcurl
make
make install
此时，您需要在.bash_profile中设置LD_LIBRARY_PATH，即
export LD_LIBRARY_PATH=$HOME/libcurl/lib:$LD_LIBRARY_PATH
然后注销并再次登录或
source ~/.bash_profile
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