install R package after update R software

old.packages <- list.files("/R/x86_64-redhat-linux-gnu-library/3.3")
source("https://bioconductor.org/biocLite.R")
# Install packages in the previous version. 

# For each package p in previous version...
for (p in old.packages[!grepl("LOCK",old.packages)]) {
  # ... Only if p is not already installed
  if (!(p %in% installed.packages()[,"Package"])) {
    # Install p 
    # print(p)
    install.packages(p) 
    if(!library(p,character.only = T,logical.return = T)){
      biocLite(p)
    }
  }
}