/bin/bash
X=""
if [ -n "$X" ]; then # -n tests to see if the argument is non empty
echo "th... s. It's by no means comprehensive, but its likely to be all you'll need to remember (if you need anything else, you can always check the bash manpage ... ... ntegers)
2
-ge
operand1 is greater than or equal to operand2 (both operands should be integers)
2
-l
======
Common practice for inputing passwords is to read the text without displaying it on the screen... luding whether or not characters should be echoed to the terminal. To turn off echoing, the command stty -echo can be used. Any subsequent user input (inc... ommands typed at the shell) will not be echoed.
To restore the echoing, use stty echo. However, it i