ivalent of strchr() in C.
==== Substr ====
Shell uses zero-based indexing. When substring expansion of the form ${param:offset[:length} is used, an `offset' that evaluates to a number less tha... ram is unset or null, and $param otherwise.
To use negative offsets that begin with a minus sign, se... # ABC
===== Default =====
These operators can be used in a variety of ways. A good example would be to
<code>if [ "$a" != "$b" ]</code>
This operator uses pattern matching within a [[ ... ]] construct.
-... Still, it is better to quote it ("$string1"), because . . .
string1="a = b"
if [ $string1 ] # ... file!"
exit $E_NOTGZIP
fi
zcat $1 | more
# Uses the 'more' filter.
# May substitute 'less' if de... milar to the Bash comparison operators && and ||, used within double brackets.
<code>[[ condition1 &&
