edu/~elflord/unix/bash-tute.html:
A brief summary of test operators
Here's a quick list of test operators. It's by no means comprehensive, but its likel... page ... )
operator
produces true if...
number of operands
-n
operand non zero length
1
-z
operan... integers and they are equal
2
-neq
the opposite of -eq
2
=
the operands are equal (as strings)
2
!
his functionality as a command, but a combination of commands will make this work.
The stty command s... ssumption that echo is on. In some cases, echoing of characters is done at the local terminal (in whic... cannot prevent echoing passwords) and the result of the second command will be that every character t... at stty trick is used in which the original state of stty is stored before the stty change and restore
