diff --git a/.templates/00-banner.sh b/.templates/00-banner.sh
index 33409469b..e62c33b9f 100644
--- a/.templates/00-banner.sh
+++ b/.templates/00-banner.sh
@@ -4,7 +4,6 @@
 # ==============================================================================
 # Displays a simple add-on banner on startup
 # ==============================================================================
-echo "hello"
 if bashio::supervisor.ping; then
     bashio::log.blue \
         '-----------------------------------------------------------'
diff --git a/enedisgateway2mqtt_dev/rootfs/etc/cont-init.d/99-run.sh b/enedisgateway2mqtt_dev/rootfs/etc/cont-init.d/99-run.sh
index 29dd49554..c3f1c2c06 100644
--- a/enedisgateway2mqtt_dev/rootfs/etc/cont-init.d/99-run.sh
+++ b/enedisgateway2mqtt_dev/rootfs/etc/cont-init.d/99-run.sh
@@ -19,14 +19,14 @@ if [ -f /data/config.yaml ] && [ ! -L /data/config.yaml ]; then
 fi
 
 # Check if config file is there, or create one from template
-if [ -f $CONFIGSOURCE ]; then
+if [ -f "$CONFIGSOURCE" ]; then
   # Create symlink if not existing yet
-  [ ! -L /data/config.yaml ] && ln -sf $CONFIGSOURCE /data
+  [ ! -L /data/config.yaml ] && ln -sf "$CONFIGSOURCE" /data
   bashio::log.info "Using config file found in $CONFIGSOURCE"
 
   # Check if yaml is valid
   EXIT_CODE=0
-  yamllint -d relaxed $CONFIGSOURCE &>ERROR || EXIT_CODE=$?
+  yamllint -d relaxed "$CONFIGSOURCE" &>ERROR || EXIT_CODE=$?
   if [ $EXIT_CODE = 0 ]; then
     echo "Config file is a valid yaml"
   else
@@ -37,10 +37,10 @@ if [ -f $CONFIGSOURCE ]; then
 else
   # Create symlink for addon to create config
   touch ${CONFIGSOURCE}
-  ln -sf $CONFIGSOURCE /data
+  ln -sf "$CONFIGSOURCE" /data
   rm $CONFIGSOURCE
   # Need to restart
-  bashio::log.fatal "Config file not found. The addon will create a new one, then stop. Please customize the file in $CONFIGSOURCE before restarting."
+  bashio::log.fatal "Config file not found. The addon will create a new one, then stop. Please customize the file in "$CONFIGSOURCE" before restarting."
 fi
 
 # Remove previous link or file
diff --git a/fireflyiii_data_importer/rootfs/etc/cont-init.d/20-folders.sh b/fireflyiii_data_importer/rootfs/etc/cont-init.d/20-folders.sh
index 4e144d1dd..5145bd129 100644
--- a/fireflyiii_data_importer/rootfs/etc/cont-init.d/20-folders.sh
+++ b/fireflyiii_data_importer/rootfs/etc/cont-init.d/20-folders.sh
@@ -9,4 +9,4 @@ mkdir -p "$CONFIGSOURCE/import_files" || true
 mkdir -p "$CONFIGSOURCE/configurations" || true
 
 # Make sure permissions are right
-chown -R $(id -u):$(id -g) "$CONFIGSOURCE"
+chown -R "$(id -u):$(id -g)" "$CONFIGSOURCE"
diff --git a/gazpar2mqtt/rootfs/etc/cont-init.d/90-config_yaml.sh b/gazpar2mqtt/rootfs/etc/cont-init.d/90-config_yaml.sh
index f53d45e74..de758c579 100644
--- a/gazpar2mqtt/rootfs/etc/cont-init.d/90-config_yaml.sh
+++ b/gazpar2mqtt/rootfs/etc/cont-init.d/90-config_yaml.sh
@@ -10,7 +10,7 @@ CONFIGSOURCE=$(bashio::config "CONFIG_LOCATION")
 chmod 755 $CONFIGSOURCE
 
 # Check if config file is there, or create one from template
-if [ -f $CONFIGSOURCE ]; then
+if [ -f "$CONFIGSOURCE" ]; then
     echo "Using config file found in $CONFIGSOURCE"
 else
     echo "No config file, creating one from template"
@@ -26,13 +26,13 @@ else
         curl -L -f -s $TEMPLATESOURCE --output $CONFIGSOURCE
     fi
     # Need to restart
-    bashio::log.fatal "Config file not found, creating a new one. Please customize the file in $CONFIGSOURCE before restarting."
+    bashio::log.fatal "Config file not found, creating a new one. Please customize the file in "$CONFIGSOURCE" before restarting."
     # bashio::exit.nok
 fi
 
 # Check if yaml is valid
 EXIT_CODE=0
-yamllint -d relaxed $CONFIGSOURCE &>ERROR || EXIT_CODE=$?
+yamllint -d relaxed "$CONFIGSOURCE" &>ERROR || EXIT_CODE=$?
 if [ $EXIT_CODE = 0 ]; then
     echo "Config file is a valid yaml"
 else
diff --git a/joal/Dockerfile b/joal/Dockerfile
index db4cf0929..e13611bc5 100644
--- a/joal/Dockerfile
+++ b/joal/Dockerfile
@@ -31,7 +31,7 @@ RUN \
     && curl -s -S -J -L -o /tmp/joal.tar.gz $(curl -s https://api.github.com/repos/anthonyraymond/joal/releases/latest | grep -o "http.*joal.tar.gz") >/dev/null \
     && mkdir -p /data/joal \
     && tar zxvf /tmp/joal.tar.gz -C /data/joal >/dev/null \
-    && chown -R $(id -u):$(id -g) /data/joal \
+    && chown -R "$(id -u):$(id -g)" /data/joal \
     && rm /data/joal/jack-of* || true
 
 ##################
diff --git a/joal/rootfs/etc/cont-init.d/99-run.sh b/joal/rootfs/etc/cont-init.d/99-run.sh
index 2fa95b25a..45e04158d 100644
--- a/joal/rootfs/etc/cont-init.d/99-run.sh
+++ b/joal/rootfs/etc/cont-init.d/99-run.sh
@@ -16,14 +16,14 @@ fi
 
 # download latest version
 
-if [ $VERBOSE = true ]; then
+if [ "$VERBOSE" = true ]; then
   curl -J -L -o /tmp/joal.tar.gz $(curl -s https://api.github.com/repos/anthonyraymond/joal/releases/latest | grep -o "http.*joal.tar.gz")
 else
   curl -s -S -J -L -o /tmp/joal.tar.gz $(curl -s https://api.github.com/repos/anthonyraymond/joal/releases/latest | grep -o "http.*joal.tar.gz") >/dev/null
 fi
 mkdir -p /data/joal
 tar zxvf /tmp/joal.tar.gz -C /data/joal >/dev/null
-chown -R $(id -u):$(id -g) /data/joal
+chown -R "$(id -u):$(id -g)" /data/joal
 rm /data/joal/jack-of*
 bashio::log.info "Joal updated"
 
@@ -84,7 +84,7 @@ mkdir -p /var/log/nginx && touch /var/log/nginx/error.log
 # LAUNCH APPS #
 ###############
 
-if [ $VERBOSE = true ]; then
+if [ "$VERBOSE" = true ]; then
   nohup java -jar /joal/joal.jar --joal-conf=/data/joal --spring.main.web-environment=true --server.port="8081" --joal.ui.path.prefix=${UIPATH} --joal.ui.secret-token=$TOKEN
 else
   nohup java -jar /joal/joal.jar --joal-conf=/data/joal --spring.main.web-environment=true --server.port="8081" --joal.ui.path.prefix=${UIPATH} --joal.ui.secret-token=$TOKEN >/dev/null
diff --git a/papermerge/rootfs/etc/cont-init.d/00-folders.sh b/papermerge/rootfs/etc/cont-init.d/00-folders.sh
index fb0956277..56d26fd77 100644
--- a/papermerge/rootfs/etc/cont-init.d/00-folders.sh
+++ b/papermerge/rootfs/etc/cont-init.d/00-folders.sh
@@ -17,4 +17,4 @@ if [ -d /data/config ]; then
 fi
 
 # Make sure permissions are right
-chown -R $(id -u):$(id -g) $CONFIGLOCATION
+chown -R "$(id -u):$(id -g)" $CONFIGLOCATION
diff --git a/transmission/rootfs/etc/cont-init.d/19-json_repair.sh b/transmission/rootfs/etc/cont-init.d/19-json_repair.sh
index 1c86b4a3a..e6ed80a4d 100644
--- a/transmission/rootfs/etc/cont-init.d/19-json_repair.sh
+++ b/transmission/rootfs/etc/cont-init.d/19-json_repair.sh
@@ -5,39 +5,39 @@ JSONTOCHECK='/config/transmission/settings.json'
 JSONSOURCE='/defaults/settings.json'
 
 # If json already exists
-if [ -f ${JSONTOCHECK} ]; then
+if [ -f "${JSONTOCHECK}" ]; then
     # Variables
     echo "Checking settings.json format"
 
     # Check if json file valid or not
-    jq . -S ${JSONTOCHECK} &>/dev/null && ERROR=false || ERROR=true
+    jq . -S "${JSONTOCHECK}" &>/dev/null && ERROR=false || ERROR=true
     if [ $ERROR = true ]; then
         bashio::log.fatal "Settings.json structure is abnormal, restoring options from scratch. Your old file is renamed as settings.json_old"
-        mv ${JSONSOURCE} ${JSONSOURCE}_old
-        cp ${JSONSOURCE} ${JSONTOCHECK}
+        mv "${JSONSOURCE}" "${JSONSOURCE}"_old
+        cp "${JSONSOURCE}" "${JSONTOCHECK}"
         exit 0
     fi
 
     # Get the default keys from the original file
-    mapfile -t arr < <(jq -r 'keys[]' ${JSONSOURCE})
+    mapfile -t arr < <(jq -r 'keys[]' "${JSONSOURCE}")
 
     # Check if all keys are still there, or add them
-    # spellcheck disable=SC2068
+    # shellcheck disable=SC2086
     for KEYS in "${arr[@]}"; do
         # Check if key exists
-        KEYSTHERE=$(jq "has(\"${KEYS}\")" ${JSONTOCHECK})
+        KEYSTHERE=$(jq "has(\"${KEYS}\")" "${JSONTOCHECK}")
         if [ "$KEYSTHERE" != "true" ]; then
             #Fetch initial value
-            JSONSOURCEVALUE=$(jq -r ".\"$KEYS\"" ${JSONSOURCE})
+            JSONSOURCEVALUE=$(jq -r ".\"$KEYS\"" "${JSONSOURCE}")
             #Add key
-            sed -i "3 i\"${KEYS}\": \"${JSONSOURCEVALUE}\"," ${JSONTOCHECK}
+            sed -i "3 i\"${KEYS}\": \"${JSONSOURCEVALUE}\"," "${JSONTOCHECK}"
             # Message
             bashio::log.warning "${KEYS} was missing from your settings.json, it was added with the default value ${JSONSOURCEVALUE}"
         fi
     done
 
     # Show structure in a nice way
-    jq . -S ${JSONTOCHECK} | cat >temp.json && mv temp.json ${JSONTOCHECK}
+    jq . -S "${JSONTOCHECK}" | cat >temp.json && mv temp.json "${JSONTOCHECK}"
 
     # Message
     bashio::log.info "Your settings.json was checked and seems perfectly normal!"