diff --git a/src/freedombone-utils-setup b/src/freedombone-utils-setup
index e0fbe7f1..33833bf2 100755
--- a/src/freedombone-utils-setup
+++ b/src/freedombone-utils-setup
@@ -667,12 +667,45 @@ function setup_firewall {
 
 function setup_powerline {
     if [ -f ~/${PROJECT_NAME}/src/${PROJECT_NAME}-powerline ]; then
-        cp ~/${PROJECT_NAME}/src/${PROJECT_NAME}-powerline ~/.powerline.bash
-        cp ~/${PROJECT_NAME}/src/${PROJECT_NAME}-powerline /etc/skel/.powerline.bash
+        if [ ! -f ~/.powerline.bash ]; then
+            cp ~/${PROJECT_NAME}/src/${PROJECT_NAME}-powerline ~/.powerline.bash
+        else
+            HASH1=$(sha256sum ~/${PROJECT_NAME}/src/${PROJECT_NAME}-powerline | awk -F ' ' '{print $1}')
+            HASH2=$(sha256sum ~/.powerline.bash | awk -F ' ' '{print $1}')
+            if [[ "$HASH1" != "$HASH2" ]]; then
+                cp ~/${PROJECT_NAME}/src/${PROJECT_NAME}-powerline ~/.powerline.bash
+            fi
+        fi
+        if [ ! -f /etc/skel/.powerline.bash ]; then
+            cp ~/${PROJECT_NAME}/src/${PROJECT_NAME}-powerline /etc/skel/.powerline.bash
+        else
+            HASH1=$(sha256sum ~/${PROJECT_NAME}/src/${PROJECT_NAME}-powerline | awk -F ' ' '{print $1}')
+            HASH2=$(sha256sum /etc/skel/.powerline.bash | awk -F ' ' '{print $1}')
+            if [[ "$HASH1" != "$HASH2" ]]; then
+                cp ~/${PROJECT_NAME}/src/${PROJECT_NAME}-powerline /etc/skel/.powerline.bash
+            fi
+        fi
     else
         if [ -f /home/${MY_USERNAME}/${PROJECT_NAME}/src/${PROJECT_NAME}-powerline ]; then
-            cp /home/${MY_USERNAME}/${PROJECT_NAME}/src/${PROJECT_NAME}-powerline ~/.powerline.bash
-            cp /home/${MY_USERNAME}/${PROJECT_NAME}/src/${PROJECT_NAME}-powerline /etc/skel/.powerline.bash
+            if [ ! -f ~/.powerline.bash ]; then
+                cp /home/${MY_USERNAME}/${PROJECT_NAME}/src/${PROJECT_NAME}-powerline ~/.powerline.bash
+            else
+                HASH1=$(sha256sum /home/${MY_USERNAME}/${PROJECT_NAME}/src/${PROJECT_NAME}-powerline | awk -F ' ' '{print $1}')
+                HASH2=$(sha256sum ~/.powerline.bash | awk -F ' ' '{print $1}')
+                if [[ "$HASH1" != "$HASH2" ]]; then
+                    cp /home/${MY_USERNAME}/${PROJECT_NAME}/src/${PROJECT_NAME}-powerline ~/.powerline.bash
+                fi
+            fi
+
+            if [ ! -f /etc/skel/.powerline.bash ]; then
+                cp /home/${MY_USERNAME}/${PROJECT_NAME}/src/${PROJECT_NAME}-powerline /etc/skel/.powerline.bash
+            else
+                HASH1=$(sha256sum /home/${MY_USERNAME}/${PROJECT_NAME}/src/${PROJECT_NAME}-powerline | awk -F ' ' '{print $1}')
+                HASH2=$(sha256sum /etc/skel/.powerline.bash | awk -F ' ' '{print $1}')
+                if [[ "$HASH1" != "$HASH2" ]]; then
+                    cp /home/${MY_USERNAME}/${PROJECT_NAME}/src/${PROJECT_NAME}-powerline /etc/skel/.powerline.bash
+                fi
+            fi
         fi
     fi
     if ! grep -q "powerline" ~/.bashrc; then
@@ -689,9 +722,11 @@ function setup_powerline {
 
 function congestion_control {
     # see /proc/sys/net/ipv4/tcp_congestion_control
-    echo 'net.core.default_qdisc=fq' > /etc/sysctl.d/10-custom-kernel-bbr.conf
-    echo 'net.ipv4.tcp_congestion_control=bbr' >> /etc/sysctl.d/10-custom-kernel-bbr.conf
-    sysctl --system
+    if [ ! -f /etc/sysctl.d/10-custom-kernel-bbr.conf ]; then
+        echo 'net.core.default_qdisc=fq' > /etc/sysctl.d/10-custom-kernel-bbr.conf
+        echo 'net.ipv4.tcp_congestion_control=bbr' >> /etc/sysctl.d/10-custom-kernel-bbr.conf
+        sysctl --system
+    fi
 }
 
 function setup_utils {
diff --git a/src/freedombone-utils-web b/src/freedombone-utils-web
index 1aa1de9d..76399a90 100755
--- a/src/freedombone-utils-web
+++ b/src/freedombone-utils-web
@@ -789,11 +789,19 @@ function update_default_domain {
             cp /etc/ssl/certs/xmpp* /etc/prosody/certs
             if [ /etc/ssl/certs/${DEFAULT_DOMAIN_NAME}.pem ]; then
                 usermod -a -G ssl-cert prosody
-                sed -i "s|/etc/prosody/certs/xmpp.key|/etc/ssl/private/${DEFAULT_DOMAIN_NAME}.key|g" /etc/prosody/conf.avail/xmpp.cfg.lua
-                sed -i "s|/etc/prosody/certs/xmpp.crt|/etc/ssl/certs/${DEFAULT_DOMAIN_NAME}.pem|g" /etc/prosody/conf.avail/xmpp.cfg.lua
+                if grep -q "/etc/prosody/certs/xmpp.key" /etc/prosody/conf.avail/xmpp.cfg.lua; then
+                    sed -i "s|/etc/prosody/certs/xmpp.key|/etc/ssl/private/${DEFAULT_DOMAIN_NAME}.key|g" /etc/prosody/conf.avail/xmpp.cfg.lua
+                fi
+                if grep -q "/etc/prosody/certs/xmpp.crt" /etc/prosody/conf.avail/xmpp.cfg.lua; then
+                    sed -i "s|/etc/prosody/certs/xmpp.crt|/etc/ssl/certs/${DEFAULT_DOMAIN_NAME}.pem|g" /etc/prosody/conf.avail/xmpp.cfg.lua
+                fi
 
-                sed -i "s|/etc/prosody/certs/xmpp.key|/etc/ssl/private/${DEFAULT_DOMAIN_NAME}.key|g" /etc/prosody/prosody.cfg.lua
-                sed -i "s|/etc/prosody/certs/xmpp.crt|/etc/ssl/certs/${DEFAULT_DOMAIN_NAME}.pem|g" /etc/prosody/prosody.cfg.lua
+                if grep -q "/etc/prosody/certs/xmpp.key" /etc/prosody/prosody.cfg.lua; then
+                    sed -i "s|/etc/prosody/certs/xmpp.key|/etc/ssl/private/${DEFAULT_DOMAIN_NAME}.key|g" /etc/prosody/prosody.cfg.lua
+                fi
+                if grep -q "/etc/prosody/certs/xmpp.crt" /etc/prosody/prosody.cfg.lua; then
+                    sed -i "s|/etc/prosody/certs/xmpp.crt|/etc/ssl/certs/${DEFAULT_DOMAIN_NAME}.pem|g" /etc/prosody/prosody.cfg.lua
+                fi
             fi
 
             if grep -q "/etc/prosody/certs/${DEFAULT_DOMAIN_NAME}.key" /etc/prosody/conf.avail/xmpp.cfg.lua; then