diff --git a/lib.sh b/lib.sh
index f4138aff34..5b50e09cf8 100644
--- a/lib.sh
+++ b/lib.sh
@@ -86,8 +86,9 @@ HTTPS_CONF="/etc/apache2/sites-available/$SUBDOMAIN.conf"
 HTTP2_CONF="/etc/apache2/mods-available/http2.conf"
 # PHP-FPM
 PHPVER=7.2
-PHP_INI=/etc/php/$PHPVER/fpm/php.ini
-PHP_POOL_DIR=/etc/php/$PHPVER/fpm/pool.d
+PHP_FPM_DIR=/etc/php/$PHPVER/fpm
+PHP_INI=$PHP_FPM/php.ini
+PHP_POOL_DIR=$PHP_FPM/pool.d
 # Adminer
 ADMINERDIR=/usr/share/adminer
 ADMINER_CONF=/etc/apache2/conf-available/adminer.conf
@@ -297,9 +298,9 @@ min_start_servers=20
 min_max_spare_servers=35
 
 # Calculate the sum of the current values
-CURRENT_START="$(grep pm.start_servers $PHP_POOL_DIR/nextcloud.conf | awk '{ print $3}')"
-CURRENT_MAX="$(grep pm.max_spare_servers $PHP_POOL_DIR/nextcloud.conf | awk '{ print $3}')"
-CURRENT_MIN="$(grep pm.min_spare_servers $PHP_POOL_DIR/nextcloud.conf | awk '{ print $3}')"
+CURRENT_START="$(grep pm.start_servers "$PHP_POOL_DIR"/nextcloud.conf | awk '{ print $3}')"
+CURRENT_MAX="$(grep pm.max_spare_servers "$PHP_POOL_DIR"/nextcloud.conf | awk '{ print $3}')"
+CURRENT_MIN="$(grep pm.min_spare_servers "$PHP_POOL_DIR"/nextcloud.conf | awk '{ print $3}')"
 CURRENT_SUM="$((CURRENT_START + CURRENT_MAX + CURRENT_MIN))"
 
 # Calculate max_children depending on RAM
@@ -331,7 +332,7 @@ The installation was not successful, sorry for the inconvenience.
 If you think this is a bug, please report it to $ISSUES"
 exit 1
 else
-    check_command sed -i "s|pm.max_children.*|pm.max_children = $PHP_FPM_MAX_CHILDREN|g" $PHP_POOL_DIR/nextcloud.conf
+    check_command sed -i "s|pm.max_children.*|pm.max_children = $PHP_FPM_MAX_CHILDREN|g" "$PHP_POOL_DIR"/nextcloud.conf
     print_text_in_color "$IGreen" "pm.max_children was set to $PHP_FPM_MAX_CHILDREN"
     # Check if the sum of all the current values are more than $PHP_FPM_MAX_CHILDREN and only continue it is
     if [ $PHP_FPM_MAX_CHILDREN -gt $CURRENT_SUM ]
@@ -339,9 +340,9 @@ else
         # Set pm.max_spare_servers
         if [ $PHP_FPM_MAX_CHILDREN -ge $min_max_spare_servers ]
         then
-            if [ "$(grep pm.start_servers $PHP_POOL_DIR/nextcloud.conf | awk '{ print $3}')" -lt $min_start_servers ]
+            if [ "$(grep pm.start_servers "$PHP_POOL_DIR"/nextcloud.conf | awk '{ print $3}')" -lt $min_start_servers ]
             then
-                check_command sed -i "s|pm.max_spare_servers.*|pm.max_spare_servers = $((PHP_FPM_MAX_CHILDREN - 30))|g" $PHP_POOL_DIR/nextcloud.conf
+                check_command sed -i "s|pm.max_spare_servers.*|pm.max_spare_servers = $((PHP_FPM_MAX_CHILDREN - 30))|g" "$PHP_POOL_DIR"/nextcloud.conf
                 print_text_in_color "$IGreen" "pm.max_spare_servers was set to $((PHP_FPM_MAX_CHILDREN - 30))"
             fi
         fi
@@ -351,10 +352,10 @@ fi
 # If $PHP_FPM_MAX_CHILDREN is lower than the current sum of all values, revert to default settings
 if [ $PHP_FPM_MAX_CHILDREN -lt $CURRENT_SUM ]
 then
-    check_command sed -i "s|pm.max_children.*|pm.max_children = $PHP_FPM_MAX_CHILDREN|g" $PHP_POOL_DIR/nextcloud.conf
-    check_command sed -i "s|pm.start_servers.*|pm.start_servers = 3|g" $PHP_POOL_DIR/nextcloud.conf
-    check_command sed -i "s|pm.min_spare_servers.*|pm.min_spare_servers = 2|g" $PHP_POOL_DIR/nextcloud.conf
-    check_command sed -i "s|pm.max_spare_servers.*|pm.max_spare_servers = 3|g" $PHP_POOL_DIR/nextcloud.conf
+    check_command sed -i "s|pm.max_children.*|pm.max_children = $PHP_FPM_MAX_CHILDREN|g" "$PHP_POOL_DIR"/nextcloud.conf
+    check_command sed -i "s|pm.start_servers.*|pm.start_servers = 3|g" "$PHP_POOL_DIR"/nextcloud.conf
+    check_command sed -i "s|pm.min_spare_servers.*|pm.min_spare_servers = 2|g" "$PHP_POOL_DIR"/nextcloud.conf
+    check_command sed -i "s|pm.max_spare_servers.*|pm.max_spare_servers = 3|g" "$PHP_POOL_DIR"/nextcloud.conf
     print_text_in_color "$ICyan" "All PHP-INI values were set back to default values as the value for pm.max_children ($PHP_FPM_MAX_CHILDREN) was lower than the sum of all the current values ($CURRENT_SUM)"
     print_text_in_color "$ICyan" "Please run this again to set optimal values"
 fi
diff --git a/nextcloud-startup-script.sh b/nextcloud-startup-script.sh
index 79bf914328..93786123f3 100644
--- a/nextcloud-startup-script.sh
+++ b/nextcloud-startup-script.sh
@@ -537,10 +537,10 @@ restart_webserver
 if home_sme_server
 then
     # Add specific values to PHP-FPM based on 16 GB RAM
-    check_command sed -i "s|pm.max_children.*|pm.max_children = 307|g" $PHP_POOL_DIR/nextcloud.conf
-    check_command sed -i "s|pm.start_servers.*|pm.start_servers = 30|g" $PHP_POOL_DIR/nextcloud.conf
-    check_command sed -i "s|pm.min_spare_servers.*|pm.min_spare_servers = 20|g" $PHP_POOL_DIR/nextcloud.conf
-    check_command sed -i "s|pm.max_spare_servers.*|pm.max_spare_servers = 257|g" $PHP_POOL_DIR/nextcloud.conf
+    check_command sed -i "s|pm.max_children.*|pm.max_children = 307|g" "$PHP_POOL_DIR"/nextcloud.conf
+    check_command sed -i "s|pm.start_servers.*|pm.start_servers = 30|g" "$PHP_POOL_DIR"/nextcloud.conf
+    check_command sed -i "s|pm.min_spare_servers.*|pm.min_spare_servers = 20|g" "$PHP_POOL_DIR"/nextcloud.conf
+    check_command sed -i "s|pm.max_spare_servers.*|pm.max_spare_servers = 257|g" "$PHP_POOL_DIR"/nextcloud.conf
     restart_webserver
 else
     # Calculate the values of PHP-FPM based on the amount of RAM available (minimum 2 GB or 8 children)
diff --git a/nextcloud_install_production.sh b/nextcloud_install_production.sh
index 8ab04d42a9..98955bc6ad 100644
--- a/nextcloud_install_production.sh
+++ b/nextcloud_install_production.sh
@@ -295,7 +295,7 @@ a2enmod http2
 restart_webserver
 
 # Set up a php-fpm pool with a unixsocket
-cat << POOL_CONF > "$PHP_POOL_DIR/nextcloud.conf"
+cat << POOL_CONF > "$PHP_POOL_DIR"/nextcloud.conf
 [Nextcloud]
 user = www-data
 group = www-data
@@ -321,7 +321,7 @@ php_admin_value [cgi.fix_pathinfo] = 1
 POOL_CONF
 
 # Disable the idling example pool.
-mv $PHP_POOL_DIR/www.conf $PHP_POOL_DIR/www.conf.backup
+mv "$PHP_POOL_DIR"/www.conf "$PHP_POOL_DIR"/www.conf.backup
 
 # Enable the new php-fpm config
 restart_webserver
@@ -375,15 +375,15 @@ crontab -u www-data -l | { cat; echo "*/5  *  *  *  * php -f $NCPATH/cron.php >
 
 # Change values in php.ini (increase max file size)
 # max_execution_time
-sed -i "s|max_execution_time =.*|max_execution_time = 3500|g" $PHP_INI
+sed -i "s|max_execution_time =.*|max_execution_time = 3500|g" "$PHP_INI"
 # max_input_time
-sed -i "s|max_input_time =.*|max_input_time = 3600|g" $PHP_INI
+sed -i "s|max_input_time =.*|max_input_time = 3600|g" "$PHP_INI"
 # memory_limit
-sed -i "s|memory_limit =.*|memory_limit = 512M|g" $PHP_INI
+sed -i "s|memory_limit =.*|memory_limit = 512M|g" "$PHP_INI"
 # post_max
-sed -i "s|post_max_size =.*|post_max_size = 1100M|g" $PHP_INI
+sed -i "s|post_max_size =.*|post_max_size = 1100M|g" "$PHP_INI"
 # upload_max
-sed -i "s|upload_max_filesize =.*|upload_max_filesize = 1000M|g" $PHP_INI
+sed -i "s|upload_max_filesize =.*|upload_max_filesize = 1000M|g" "$PHP_INI"
 
 # Set loggging
 occ_command config:system:set log_type --value=file
@@ -424,7 +424,7 @@ echo "opcache.memory_consumption=256"
 echo "opcache.save_comments=1"
 echo "opcache.revalidate_freq=1"
 echo "opcache.validate_timestamps=1"
-} >> $PHP_INI
+} >> "$PHP_INI"
 
 # PHP-FPM optimization
 # https://geekflare.com/php-fpm-optimization/
@@ -442,7 +442,7 @@ echo "pgsql.max_persistent = -1"
 echo "pgsql.max_links = -1"
 echo "pgsql.ignore_notice = 0"
 echo "pgsql.log_notice = 0"
-} >> /etc/php/$PHPVER/fpm/conf.d/20-pdo_pgsql.ini
+} >> "$PHP_FPM_DIR"/conf.d/20-pdo_pgsql.ini
 
 # Install Redis (distrubuted cache)
 run_static_script redis-server-ubuntu
@@ -463,7 +463,7 @@ echo "# igbinary for PHP"
 echo "extension=igbinary.so"
 echo "session.serialize_handler=igbinary"
 echo "igbinary.compact_strings=On"
-} >> $PHP_INI
+} >> "$PHP_INI"
 restart_webserver
 fi
 
@@ -494,7 +494,7 @@ echo "apc.use_request_time=1"
 echo "apc.serializer=igbinary"
 echo "apc.coredump_unmap=0"
 echo "apc.preload_path"
-} >> $PHP_INI
+} >> "$PHP_INI"
 restart_webserver
 fi
 
diff --git a/static/redis-server-ubuntu.sh b/static/redis-server-ubuntu.sh
index 6e5bbea03e..3af674faa8 100644
--- a/static/redis-server-ubuntu.sh
+++ b/static/redis-server-ubuntu.sh
@@ -38,7 +38,7 @@ install_if_not redis-server
 
 # Setting direct to PHP-FPM as it's installed with PECL (globally doesn't work)
 print_text_in_color "$ICyan" "Adding extension=redis.so to $PHP_INI..."
-echo 'extension=redis.so' >> $PHP_INI
+echo 'extension=redis.so' >> "$PHP_INI"
 
 # Prepare for adding redis configuration
 sed -i "s|);||g" $NCPATH/config/config.php