pacman -Ss ca-certificates ca-certificates-utils ca-certificates-cacert ca-certificates-mozilla

/etc/ca-certificates
/usr/share/ca-certificates
/usr/share/ca-certificates/trust-source

ca-certificates-java
man update-ca-trust

centos-7:
ca-certs package
/etc/ssl/certs/
/etc/pki/tls/certs/
    ca-bundle.crt -> /etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem

~/.curlrc
cacert=/etc/ssl/certs/ca-bundle.crt