.TH LINKCHECKER 1 "10 March 2001"
.SH NAME
linkchecker \- check your HTML documents for broken links
.SH SYNOPSIS
.B linkchecker
[
.I options
]
[
.I file-or-url
]
.SH DESCRIPTION
.LP
LinkChecker features
recursive checking,
multithreading,
output in colored or normal text, HTML, SQL, CSV or a sitemap
graph in GML or XML,
support for HTTP/1.1, HTTPS, FTP, mailto:, news:, nntp:, 
Gopher, Telnet and local file links, 
restriction of link checking with regular expression filters for URLs,
proxy support,
username/password authorization for HTTP and FTP,
robots.txt exclusion protocol support,
i18n support,
a command line interface and
a (Fast)CGI web interface (requires HTTP server)
.SH EXAMPLES
The most common use checks the given domain recursively, plus any
single URL pointing outside of the domain:
  \fBlinkchecker http://treasure.calvinsplayground.de/\fP

Beware that this checks the whole site which can have several hundred
thousands URLs. Use the -r option to restrict the recursion depth.

Don't connect to mailto: hosts, only check their URL syntax. All other
links are checked as usual:
  \fBlinkchecker --intern='!^mailto:' --extern-strict-all www.mysite.org\fP

Checking a local HTML file on Unix:
  \fBlinkchecker ../bla.html\fP

Checking a local HTML file on Windows:
  \fBlinkchecker c:\\temp\\test.html\fP

You can skip the \fBhttp://\fP url part if the domain starts with \fBwww.\fP:
  \fBlinkchecker www.myhomepage.de\fP

You can skip the \fBftp://\fP url part if the domain starts with \fBftp.\fP:
  \fBlinkchecker -r0 ftp.linux.org\fP
.SH OPTIONS
For single-letter option arguments the space is not a necessity.
So \fB-o colored\fP is the same as \fB-ocolored\fP.
.TP
\fB-a\fP, \fB--anchors\fP
Check HTTP anchor references.  This option applies to both internal
and external urls. Default is don't check anchors.
This option implies -w because anchor errors are always warnings.
.TP
\fB-C\fP, \fB--cookies\fP
Accept and send HTTP cookies according to RFC 2109. Only cookies
which are sent back to the originating server are accepted.
Sent and accepted cookies are provided as additional logging
information.
.TP
\fB-d\fP, \fB--denyallow\fP
Swap checking order to external/internal. Default checking order is
internal/external.
.TP
\fB-D\fP, \fB--debug\fP
Print debugging information. Provide this option multiple times
for even more debugging information. Enabling debug will also
disable threading.
.TP
\fB-e\fP \fIregex\fP, \fB--extern=\fP\fIregex\fP
Assume urls that match the given regular expression as external.
Only internal HTML links are checked recursively.
.TP
\fB--extern-strict=\fP\fIregex\fP
Assume urls that match the given regular expression as strict external.
Only internal HTML links are checked recursively.
.TP
\fB-f\fP \fIfile\fP, \fB--config=\fP\fIfile\fP
Use \fIfile\fP as configuration file. As default LinkChecker first searches
/etc/linkcheckerrc and then ~/.linkcheckerrc.
.TP
\fB-F\fP \fItype\fP[\fB/\fP\fIfilename\fP], \fB--file-output=\fP\fItype\fP[\fB/\fP\fIfilename\fP]
Output to a file \fBlinkchecker-out.\fP\fItype\fP,
\fB$HOME/.linkchecker_blacklist\fP for
\fBblacklist\fP output, or \fIfilename\fP if specified.
The \fIfilename\fP part of the \fBnone\fP output type will be ignored,
else if the file already exists, it will be overwritten.
You can specify this option more than once. Valid file output types
are \fBtext\fP, \fBcolored\fP, \fBhtml\fP, \fBsql\fP,
\fBcsv\fP, \fBgml\fP, \fBxml\fP, \fBnone\fP or \fBblacklist\fP
Default is no file output. If console output is not specified with
\fB-o\fP, this option suppresses all console output by implying
\fB-o none\fP.
.TP
\fB-I\fP, \fB--interactive\fP
Ask for url if none are given on the commandline.
.TP
\fB-i\fP \fIregex\fP, \fB--intern=\fIregex\fP
Assume URLs that match the given regular expression as internal.
LinkChecker descends recursively only to internal URLs, not to external.
.TP
\fB-h\fP, \fB--help\fP
Help me! Print usage information for this program.
.TP
\fB-N\fP \fIserver\fP, \fB--nntp-server=\fP\fIserver\fP
Specify an NNTP server for 'news:...' links. Default is the
environment variable NNTP_SERVER. If no host is given,
only the syntax of the link is checked.
.TP
\fB--no-anchor-caching\fP
Treat url#anchora and url#anchorb as equal on caching. This
is the default browser behaviour, but it's not specified in
the URI specification. Use with care.
.TP
\fB-o\fP \fItype\fP, \fB--output=\fP\fItype\fP
Specify output type as \fBtext\fP, \fBcolored\fP, \fBhtml\fP, \fBsql\fP,
\fBcsv\fP, \fBgml\fP, \fBxml\fP, \fBnone\fP or \fBblacklist\fP.
Default type is \fBtext\fP.
.TP
\fB-p\fP \fIpwd\fP, \fB--password=\fP\fIpwd\fP
Try the password \fIpwd\fP for HTTP and FTP authorization.
For FTP the default password is \fBanonymous@\fP. See also \fB-u\fP.
.TP
\fB-P\fP \fIsecs\fP, \fB--pause=\fP\fIsecs\fP
Pause \fIsecs\fP seconds between each url check. This option
implies \fB-t0\fP.
Default is no pause between requests.
.TP
\fB-q\fP, \fB--quiet\fP
Quiet operation. This is only useful with \fB-F\fP.
.TP
\fB-r\fP \fIdepth\fP, \fB--recursion-level=\fP\fIdepth\fP
Check recursively all links up to given \fIdepth\fP.
A negative depth will enable inifinite recursion.
Default depth is inifinite.
.TP
\fB-s\fP, \fB--extern-strict-all\fP
Check only the syntax of external links, do not try to connect to them.
For local file urls, only local files are internal. For
http and ftp urls, all urls at the same domain name are internal.
.TP
\fB--no-status\fP
Do not print check status every 5 seconds to stderr. Does not work with the
\fB--debug\fP option.
.TP
\fB-t\fP \fInum\fP, \fB--threads=\fP\fInum\fP
Generate no more than \fInum\fP threads. Default number of threads is 10.
To disable threading specify a non-positive number.
.TP
\fB--timeout=\fP\fIsecs\fP
Set the timeout for connection attempts in seconds. The default timeout
is 30 seconds.
.TP
\fB-u\fP \fIname\fP, \fB--user=\fP\fIname\fP
Try username \fIname\fP for HTTP and FTP authorization.
For FTP the default username is \fBanonymous\fP. See also \fB-p\fP.
.TP
\fB-V\fP, \fB--version\fP
Print version and exit.
.TP
\fB-v\fP, \fB--verbose\fP
Log all checked URLs (implies \fB-w\fP). Default is to log only invalid
URLs.
.TP
\fB-w\fP, \fB--warnings\fP
Log warnings.
.TP
\fB-W\fP \fIregex\fP, \fB--warning-regex=\fIregex\fP
Define a regular expression which prints a warning if it matches any
content of the checked link.
This applies of course only to pages which are valid, so we can get
their content.
Use this to check for pages that contain some form of error, for example
'This page has moved' or 'Oracle Application Server error'.
This option implies \fB-w\fP.
.TP
\fB--warning-size-bytes=\fP\fIbytes\fP
Print a warning if content size is available and exceeds the given
number of \fIbytes\fP.
This option implies \fB-w\fP.
.SH NOTES
A \fB!\fP before any regex negates it. So \fB'!^mailto:'\fP matches
everything but a mailto link.

LinkCheckers commandline parser treats \fBftp.\fP links like \fBftp://ftp.\fP
and \fBwww.\fP links like \fBhttp://www.\fP.
You can also give local files as arguments.

If you have your system configured to automatically establish a
connection to the internet (e.g. with diald), it will connect when
checking links not pointing to your local host.
Use the -s and -i options to prevent this.

Javascript links are currently ignored.

If your platform does not support threading, LinkChecker uses
\fB-t0\fP.

You can supply multiple user/password pairs in a configuration file.

To use proxies set $http_proxy, $https_proxy on Unix or Windows.
On a Mac use the Internet Config.

When checking 'news:' links the given NNTP host doesn't need to be the
same as the host of the user browsing your pages!
.SH AUTHOR
Bastian Kleineidam <calvin@debian.org>