CawOS 3.0 installer and updater

-- MONITOR was CHANGED in monitor.cfg
--optimal monitor size 5*4

local found = fs.exists("config/monitor.cfg")
if found == false then
print("Input Monitor Number:")
input = read()
local file = fs.open("config/monitor.cfg","w")
file.writeLine(input)
file.writeLine("peripheralspluplus_off")
file.writeLine("space")
file.writeLine("clear")
file.close()
end
file = fs.open("config/monitor.cfg","r")
local fileData = {}
local line = file.readLine()
repeat
table.insert(fileData,line)
line = file.readLine()
until line == nil
file.close()
monitor_number = fileData[1]

local programName = "Caw_OS"
local pasteIndex = "EZYiC6RV"
shell.run("rm"..programName)
shell.run("delete "..programName)
shell.run("pastebin get "..pasteIndex.." "..programName)
shell.run("monitor",monitor_number,programName)