This manual page documents briefly the update-ca-certificates command.
update-ca-certificates is a program that updates the directory
/etc/ssl/certs to hold SSL certificates and generates certificates.crt,
a concatenated single-file list of certificates.
It reads the file /etc/ca-certificates.conf. Each line gives a pathname
of a CA certificate under /usr/share/ca-certificates that should be
trusted. Lines that begin with "#" are comment lines and thus ignored.
Lines that begin with "!" are deselected, causing the deactivation of
the CA certificate in question. Certificates must have a .crt extension
in order to be included by update-ca-certificates.
Furthermore all certificates with a .crt extension found below
/usr/local/share/ca-certificates are also included as implicitly
Before terminating, update-ca-certificates invokes run-parts on
/etc/ca-certificates/update.d and calls each hook with a list of cer-
tificates: those added are prefixed with a +, those removed are pre-
fixed with a -.
A summary of options is included below.
Show summary of options.
Be verbose. Output c_rehash.
Fresh updates. Remove symlinks in /etc/ssl/certs directory.
A configuration file.
A single-file version of CA certificates. This holds all CA
certificates that you activated in /etc/ca-certificates.conf.
Directory of CA certificates.
Directory of local CA certificates (with .crt extension).
Man Pages Copyright Respective Owners. Site Copyright (C) 1994 - 2017
All Rights Reserved.