getwd() #get working directory            
setwd("~/Desktop/") #set working directory
#setwd works with linux absolute or relative pathnames:

# ~/ returns you to your login directory 

# /home/ takes you to the home directory 
#where user login directories are usually stored

# ../  moves you up one directory

# ./my_sub_dir  moves you down to the subdirectory 
  #named "my_sub_dir"

getwd() #get working directory
dir() #list of directory files
ls() #list of R objects