curline = ""

file1 = fs.open("jobs", "r")
file2 = fs.open("temp", "w")
repeat
curline = file1.readLine()
if not curline == nill then
if fs.exists(curline) then
file2.writeLine(curline)
end
end
until curline == nill
file1.close()
file2.close()
shell.run("delete", "jobs")
shell.run("copy", "temp", "jobs")