Run these commands in terminal

#Update and Install R
sudo apt-get update
sudo apt-get install r-base r-base-dev
sudo apt-get upgrade

# Know R version
R --version

Run these commands in R terminal

# Know R version
sessionInfo()

# Know version of specific packages
packageVersion("ggplot2")

# check installed packages
installed.packages()

# list all packages where an update is available
old.packages()

# update all available packages
update.packages()

# update, without prompts for permission/clarification
update.packages(ask = FALSE)
 update.packages(checkBuilt = TRUE, ask = FALSE, repos = "https://cran.rstudio.com")

# update only a specific package use install.packages()
install.packages("ggplot2")


# install packages from bioconductor
source("https://bioconductor.org/biocLite.R")
biocLite("ComplexHeatmap")

# install multiple packages from bioconductor
source("https://bioconductor.org/biocLite.R")
biocLite("ComplexHeatmap", "ggplot2")


# install packages from github
library(devtools)
install_github("jokergoo/ComplexHeatmap")


# start library
library('ggplot2')