# Linux Cert Management The easy way to manage certificates is navigate to chrome://settings/certificates. Then click on the "Manage Certificates" button. This will load a built-in interface for managing certificates. On Linux, Chromium uses the [NSS Shared DB](https://wiki.mozilla.org/NSS_Shared_DB_And_LINUX). If the built-in manager does not work for you then you can configure certificates with the [NSS command line tools](http://www.mozilla.org/projects/security/pki/nss/tools/). ## Details ### Get the tools * Debian/Ubuntu: `sudo apt-get install libnss3-tools` * Fedora: `su -c "yum install nss-tools"` * Gentoo: `su -c "echo 'dev-libs/nss utils' >> /etc/portage/package.use && emerge dev-libs/nss"` (You need to launch all commands below with the `nss` prefix, e.g., `nsscertutil`.) * Opensuse: `sudo zypper install mozilla-nss-tools` ### List all certificates certutil -d sql:$HOME/.pki/nssdb -L #### Ubuntu Jaunty error Above (and most commands) gives: certutil: function failed: security library: invalid arguments. Package version 3.12.3.1-0ubuntu0.9.04.2 ### List details of a certificate certutil -d sql:$HOME/.pki/nssdb -L -n ### Add a certificate ```shell certutil -d sql:$HOME/.pki/nssdb -A -t -n \ -i ``` The TRUSTARGS are three strings of zero or more alphabetic characters, separated by commas. They define how the certificate should be trusted for SSL, email, and object signing, and are explained in the [certutil docs](http://www.mozilla.org/projects/security/pki/nss/tools/certutil.html#1034193) or [Meena's blog post on trust flags](https://blogs.oracle.com/meena/entry/notes_about_trust_flags). For example, to trust a root CA certificate for issuing SSL server certificates, use ```shell certutil -d sql:$HOME/.pki/nssdb -A -t "C,," -n \ -i ``` To import an intermediate CA certificate, use ```shell certutil -d sql:$HOME/.pki/nssdb -A -t ",," -n \ -i ``` Note: to trust a self-signed server certificate, we should use ``` certutil -d sql:$HOME/.pki/nssdb -A -t "P,," -n \ -i ``` This should work now, because [NSS bug 531160](https://bugzilla.mozilla.org/show_bug.cgi?id=531160) is claimed to be fixed in a related bug report. If it doesn't work, then to work around the NSS bug, you have to trust it as a CA using the "C,," trust flags. #### Add a personal certificate and private key for SSL client authentication Use the command: pk12util -d sql:$HOME/.pki/nssdb -i PKCS12_file.p12 to import a personal certificate and private key stored in a PKCS #12 file. The TRUSTARGS of the personal certificate will be set to "u,u,u". ### Delete a certificate certutil -d sql:$HOME/.pki/nssdb -D -n