diff --git a/cd.sh b/cd.sh
index 60e36e1..7ea99ee 100644
--- a/cd.sh
+++ b/cd.sh
@@ -18,7 +18,7 @@ cd_main () {
     cd_update_packages_catalog
     cd_install_packages_tools
     cd_install_ca
-    cd_copy_ca
+    cd_write_ca
     cd_update_ca
     cd_set_https_verification_on
     cd_update_packages_catalog
@@ -191,15 +191,23 @@ cd_install_ca () {
     cd_install_package "${CD_CA_PACKAGE}"
 }
 
-cd_copy_ca () {
+cd_write_ca () {
+local index
 local target
+local text
     cd_step "Copy CA"
     case "${CD_OS_NAME}" in
         "debian") target="/usr/local/share/ca-certificates" ;;
         "alma") target="/etc/pki/ca-trust/source/anchors" ;;
         *) cd_error_os "cd_copy_ca" ;;
     esac
-    echo "TODO"
+    index=1
+    eval "text=\${CD_CA_${index}}"
+    while [ "${text}" ] ; do
+        cd_write "${target}/${index}.crt" "${text}"
+        index=$((index+1))
+        eval "text=\${CD_CA_${index}}"
+    done
 }
 
 cd_update_ca () {