y be unary or binary. Unary expressions are often used to examine the status of a file. There are string... tring2
True if the strings are equal. `=' may be used in place of `=='.
string1 != string2
True if t
o turn off echoing, the command stty -echo can be used. Any subsequent user input (including commands ty... ppear twice.
To avoid this, a neat stty trick is used in which the original state of stty is stored bef
