I went looking around for bash scripting tips, especially secure coding of bash. Can't find much information, so decided to consolidate whatever I found here.

• Salt string comparisons of variables to increase security
  

  if [[ "a$?" == "a4" ]]; then
  

I am reading the the Today newspaper and there's an article on wireless security. "Go wireless, but keep intruders away", it says. All's well and good, till one reads the contents: