certwatch - generate SSL certificate expiry warnings
certwatch [OPTION...] filename
The certwatch program is used to issue warning mail when an SSL cer-
tificate is about to expire.
The program has two modes of operation: normal mode and quiet mode. In
normal mode, the certificate given by the filename argument is exam-
ined, and a warning email is issued to standard output if the certifi-
cate is outside its validity period, or approaching expiry. If the cer-
tificate cannot be found, or any errors occur whilst parsing the cer-
tificate, the certificate is ignored and no output is produced. In qui-
et mode, no output is given, but the exit status can still be used.
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
--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 root.
The exit code indicates the state of the certificate:
0 The certificate is outside its validity period, or approaching
1 The certificate is inside its validity period, or could not be
The certwatch program is run daily by crond from the file
/etc/cron.daily/certwatch to warn about the imminent expiry of SSL cer-
tificates configured for use in the Apache HTTP server. This warning
can be disabled by adding the line: NOCERTWATCH=yes to the file
/etc/sysconfig/httpd. Options to pass to certwatch can be specified in
that file in the CERTWATCH_OPTS environment variable.
crypto-utils April 2005 CERTWATCH(1)
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