Updated: April 2005
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certwatch - generate SSL certificate expiry warnings
certwatch [OPTION...] filename
program is used to issue warning mail when an SSL certificate is about to expire.
The program has two modes of operation: normal mode and quiet mode. In normal mode, the certificate given by the
argument is examined, and a warning email is issued to standard output if the certificate is outside its validity period, or approaching expiry. If the certificate cannot be found, or any errors occur whilst parsing the certificate, the certificate is ignored and no output is produced. In quiet mode, no output is given, but the exit status can still be used.
- --quiet, -q
Enable quiet mode; no output is produced whether the certificate is expired or not
- --period days, -p days
Specify the number of days within which an expiry warning will be produced; default is 30. Expiry warnings are always produced if, on the day of invocation, the certificate is not yet valid, has already expired, or is due to expire either that day or the following day.
- --address address, -a address
Specify the address used in the To field of the warning e-mail issued if quiet mode is not enabled. The default is
The exit code indicates the state of the certificate:
The certificate is outside its validity period, or approaching expiry
The certificate is inside its validity period, or could not be parsed
program is run daily by
from the file
to warn about the imminent expiry of SSL certificates configured for use in the Apache HTTP server. This warning can be disabled by adding the line:
to the file
/etc/sysconfig/httpd. Options to pass to certwatch can be specified in that file in the
- SEE ALSO
linux.jgfs.net manual pages