' UNION SELECT name, type, id FROM sysobjects;--' or '1'='1' or '1'='1' -- '' or '1'='1' ({ '' or '1'='1' /* '[root]# service sendmail status
Configuring Linux Mail Servers
http://www.linuxhomenetworking.com/wiki/index.php/Quick_HOWTO_:_Ch21_:_Configuring_Linux_Mail_Servers#Starting_Sendmail
[agk] matches any one a, g, or k
[a-z] matches any one character from a to z
[^z] matches any character other than z
[\\(\\)] matches ( or ) (in javascript, the escape slash must be escaped!)
. any character except \n
\w any word character, same as [a-zA-Z0-9_]
\W any non-word character
\s any whitespace character, same as [ \t\n\r\f\v]
\S any non-whitespace character
\d any digit
\D any non-digit
\/ literal /
\\ literal \
\. literal .
\* literal *
\+ literal +
\? literal ?
\| literal |
\( literal (
\) literal )
\[ literal [
\] literal ]
\- the - must be escaped inside brackets: [a-z0-9 _.\-\?!]
{n,m} match previous item n to m times
{n,} match previous item n or more times
{n} match exactly n times
? match zero or once, same as {0,1}, also makes + and * "lazy"
+ match one or more
* match zero or more
| or
(x|y) match x or y, inclusive (all x and y will be replaced)
( ) grouping and reference
\1 reference to first grouping, used in the expression
$1 reference to first grouping, used in the replacement string
$$ literal $ used in the replacement string
^ anchor to the beginning of the string
$ anchor to the end of the string
\b match a word boundary (does not include the boundary)
\B match a non word boundary (does not include the boundary)
q(?=u) match q only before u (does not match the u)
q(?!u) match q except before u
i case-insensitive search, used like /expression/i
g global replacement, used like /expression/g