diff --git a/administration/bash.sh b/administration/bash.sh
index f1c142d..bcb1b7f 100644
--- a/administration/bash.sh
+++ b/administration/bash.sh
@@ -1,2 +1,3 @@
 #!/bin/bash
-(cd $(dirname $(readlink -f ${0}))/../docker-symfony/ && docker-compose exec php /bin/bash)
+cd "$(dirname "$(readlink -f "${0}")")/../docker-symfony/" || exit 1
+docker-compose exec php /bin/bash
diff --git a/administration/build.sh b/administration/build.sh
index 326f9c7..d9a2581 100644
--- a/administration/build.sh
+++ b/administration/build.sh
@@ -1,8 +1,6 @@
 #!/bin/bash
-(
-cd $(dirname $(readlink -f ${0}))/;
-bash ./copy-configuration.sh
-cd ../docker-symfony;
-docker-compose build;
-docker-compose up -d;
-)
+cd "$(dirname "$(readlink -f "${0}")")/" &&
+bash ./copy-configuration.sh &&
+cd ../docker-symfony &&
+docker-compose build &&
+docker-compose up -d
diff --git a/administration/cleanup-ignored.sh b/administration/cleanup-ignored.sh
index da1d05a..fb7cc98 100644
--- a/administration/cleanup-ignored.sh
+++ b/administration/cleanup-ignored.sh
@@ -1,3 +1,4 @@
 #!/bin/bash
 echo "Untracked and ignored files will be deleted..."
-(cd $(dirname $(readlink -f ${0}))/../ && git clean -fXd)
+cd "$(dirname "$(readlink -f "${0}")")/../" &&
+git clean -fXd
diff --git a/administration/clear.sh b/administration/clear.sh
index f76c395..89393d7 100644
--- a/administration/clear.sh
+++ b/administration/clear.sh
@@ -1,2 +1,6 @@
 #!/bin/bash
-(cd $(dirname $(readlink -f ${0}))/../docker-symfony/ && docker-compose exec php php /var/www/symfony/bin/console cache:clear && docker-compose exec php php /var/www/symfony/bin/console cache:clear --env=prod)
+(
+cd "$(dirname "$(readlink -f "${0}")")/../docker-symfony/" && 
+docker-compose exec php php /var/www/symfony/bin/console cache:clear &&
+docker-compose exec php php /var/www/symfony/bin/console cache:clear --env=prod
+)
diff --git a/administration/composer-update.sh b/administration/composer-update.sh
index 3c0b213..e4f9188 100644
--- a/administration/composer-update.sh
+++ b/administration/composer-update.sh
@@ -1,2 +1,6 @@
 #!/bin/bash
-(cd $(dirname $(readlink -f ${0}))/../docker-symfony/&& docker-compose exec php composer install && docker-compose exec php composer update)
+(
+cd "$(dirname "$(readlink -f "${0}")")/../docker-symfony/" && 
+docker-compose exec php composer install &&
+docker-compose exec php composer update
+)
diff --git a/administration/copy-configuration.sh b/administration/copy-configuration.sh
index 355cd98..f6285f7 100644
--- a/administration/copy-configuration.sh
+++ b/administration/copy-configuration.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
 # Copies the configuration files
-cd $(dirname $(readlink -f ${0}))/../;
-cp -v .env.dist docker-symfony/.env;
-cp -v ./application/phpunit.xml.dist ./application/phpunit.xml;
+cd "$(dirname "$(readlink -f "${0}")")/../" || exit 1
+cp -v .env.dist docker-symfony/.env
+cp -v ./application/phpunit.xml.dist ./application/phpunit.xml
diff --git a/administration/format-code.sh b/administration/format-code.sh
index 811505a..309d3a2 100644
--- a/administration/format-code.sh
+++ b/administration/format-code.sh
@@ -1,2 +1,3 @@
 #!/bin/bash
-(cd $(dirname $(readlink -f ${0}))/../docker-symfony/ && docker-compose exec php php vendor/bin/php-cs-fixer fix .)
+cd "$(dirname "$(readlink -f "${0}")")/../docker-symfony/" || exit 1
+docker-compose exec php php vendor/bin/php-cs-fixer fix .
diff --git a/administration/generate-coverage-report.sh b/administration/generate-coverage-report.sh
index b0d3908..860d748 100644
--- a/administration/generate-coverage-report.sh
+++ b/administration/generate-coverage-report.sh
@@ -1,2 +1,3 @@
 #!/bin/bash
-(cd $(dirname $(readlink -f ${0}))/../docker-symfony/ && docker-compose exec php php -d memory_limit=128M /var/www/symfony/vendor/bin/phpunit --coverage-html var/test-coverage-report)
+cd "$(dirname "$(readlink -f "${0}")")/../docker-symfony/" || exit 1
+docker-compose exec php php -d memory_limit=128M /var/www/symfony/vendor/bin/phpunit --coverage-html var/test-coverage-report
diff --git a/administration/init.sh b/administration/init.sh
index 2540ca8..f0acd26 100644
--- a/administration/init.sh
+++ b/administration/init.sh
@@ -1,9 +1,7 @@
 #!/bin/bash
-(
-  cd $(dirname $(readlink -f ${0}));
-  bash ./submodule-init.sh
-  bash ./build.sh
-  bash ./composer-update.sh
-  bash ./schema-update.sh
-  bash ./load-fixtures.sh
-)
+cd "$(dirname "$(readlink -f "${0}")")" &&
+bash ./submodule-init.sh &&
+bash ./build.sh &&
+bash ./composer-update.sh &&
+bash ./schema-update.sh &&
+bash ./load-fixtures.sh
diff --git a/administration/load-fixtures.sh b/administration/load-fixtures.sh
index 2eeb6fd..6770737 100644
--- a/administration/load-fixtures.sh
+++ b/administration/load-fixtures.sh
@@ -1,2 +1,3 @@
 #!/bin/bash
-(cd $(dirname $(readlink -f ${0}))/../docker-symfony/ && docker-compose exec php php bin/console doctrine:fixtures:load -n)
+cd "$(dirname "$(readlink -f "${0}")")/../docker-symfony/" || exit 1
+docker-compose exec php php bin/console doctrine:fixtures:load -n
diff --git a/administration/mysql.sh b/administration/mysql.sh
index ba134b6..e64fd06 100644
--- a/administration/mysql.sh
+++ b/administration/mysql.sh
@@ -1,2 +1,3 @@
 #!/bin/bash
-(cd $(dirname $(readlink -f ${0}))/../docker-symfony/ && docker-compose exec db mysql -proot -u root)
+cd "$(dirname "$(readlink -f "${0}")")/../docker-symfony/" || exit 1
+docker-compose exec db mysql -proot -u root
diff --git a/administration/router.sh b/administration/router.sh
index 2aa9224..fb2ce87 100644
--- a/administration/router.sh
+++ b/administration/router.sh
@@ -1,2 +1,3 @@
 #!/bin/bash
-(cd $(dirname $(readlink -f ${0}))/../docker-symfony/ && docker-compose exec php php bin/console debug:router);
+cd "$(dirname "$(readlink -f "${0}")")/../docker-symfony/" || exit 1
+docker-compose exec php php bin/console debug:router
diff --git a/administration/schema-update.sh b/administration/schema-update.sh
index 2e56831..0d09f1c 100644
--- a/administration/schema-update.sh
+++ b/administration/schema-update.sh
@@ -1,2 +1,3 @@
 #!/bin/bash
-(cd $(dirname $(readlink -f ${0}))/../docker-symfony/ && docker-compose exec php php bin/console doctrine:schema:update --force)
+cd "$(dirname "$(readlink -f "${0}")")/../docker-symfony/" || exit 1
+docker-compose exec php php bin/console doctrine:schema:update --force
diff --git a/administration/schema-validate.sh b/administration/schema-validate.sh
index a2fd823..3e2f456 100644
--- a/administration/schema-validate.sh
+++ b/administration/schema-validate.sh
@@ -1,2 +1,3 @@
 #!/bin/bash
-(cd $(dirname $(readlink -f ${0}))/../docker-symfony/ && docker-compose exec php bin/console doctrine:schema:validate)
+cd "$(dirname "$(readlink -f "${0}")")/../docker-symfony/" && 
+docker-compose exec php bin/console doctrine:schema:validate
diff --git a/administration/shellcheck.sh b/administration/shellcheck.sh
index 877500a..5aec32c 100644
--- a/administration/shellcheck.sh
+++ b/administration/shellcheck.sh
@@ -1,3 +1,3 @@
 #!/bin/bash
-cd $(dirname $(readlink -f ${0}))/;
+cd "$(dirname "$(readlink -f "${0}")")/" &&
 shellcheck ./*.sh
diff --git a/administration/start.sh b/administration/start.sh
index 9cc187b..30c8c05 100644
--- a/administration/start.sh
+++ b/administration/start.sh
@@ -1,2 +1,3 @@
 #!/bin/bash
-(cd $(dirname $(readlink -f ${0}))/../docker-symfony/ && docker-compose up -d)
+cd "$(dirname "$(readlink -f "${0}")")/../docker-symfony/" &&
+docker-compose up -d
diff --git a/administration/stop.sh b/administration/stop.sh
index 8d610a5..d7f3439 100644
--- a/administration/stop.sh
+++ b/administration/stop.sh
@@ -1,2 +1,3 @@
 #!/bin/bash
-(cd $(dirname $(readlink -f ${0}))/../docker-symfony/ && docker-compose stop)
+cd "$(dirname "$(readlink -f "${0}")")/../docker-symfony/" && 
+docker-compose stop
diff --git a/administration/submodule-init.sh b/administration/submodule-init.sh
index 06bc520..fb8c369 100644
--- a/administration/submodule-init.sh
+++ b/administration/submodule-init.sh
@@ -1,5 +1,3 @@
 #!/bin/bash
-(
-cd $(dirname $(readlink -f ${0}))/../;
+cd "$(dirname "$(readlink -f "${0}")")/../" &&
 git submodule update --init --recursive
-)
diff --git a/administration/submodule-sync.sh b/administration/submodule-sync.sh
index 1a0bc15..0ecf7b5 100644
--- a/administration/submodule-sync.sh
+++ b/administration/submodule-sync.sh
@@ -1,6 +1,4 @@
 #!/bin/bash
-(
-  cd $(dirname $(readlink -f ${0}))/../;
-  git submodule sync;
-  git submodule foreach git pull origin master;
-)
+cd "$(dirname "$(readlink -f "${0}")")/../" &&
+git submodule sync &&
+git submodule foreach git pull origin master
diff --git a/administration/test-code-format.sh b/administration/test-code-format.sh
index 8716961..f06173c 100644
--- a/administration/test-code-format.sh
+++ b/administration/test-code-format.sh
@@ -1,2 +1,3 @@
 #!/bin/bash
-(cd $(dirname $(readlink -f ${0}))/../docker-symfony/ && docker-compose exec php php ./vendor/bin/php-cs-fixer fix -v --diff --dry-run ./src)
+cd "$(dirname "$(readlink -f "${0}")")/../docker-symfony/" || exit 1
+docker-compose exec php php ./vendor/bin/php-cs-fixer fix -v --diff --dry-run ./src
diff --git a/administration/test-everything.sh b/administration/test-everything.sh
index 0f3a2a9..27e2630 100644
--- a/administration/test-everything.sh
+++ b/administration/test-everything.sh
@@ -1,7 +1,6 @@
 #!/bin/bash
-(cd $(dirname $(readlink -f ${0}))/  &&
+cd "$(dirname "$(readlink -f "${0}")")/"  &&
 bash ./clear.sh &&
 bash ./schema-validate.sh &&
 bash ./test.sh &&
 bash ./test-code-format.sh
-)
diff --git a/administration/test.sh b/administration/test.sh
index 831c5fa..c63338a 100644
--- a/administration/test.sh
+++ b/administration/test.sh
@@ -1,2 +1,3 @@
 #!/bin/bash
-(cd $(dirname $(readlink -f ${0}))/../docker-symfony/ && docker-compose exec php php -d memory_limit=128M /var/www/symfony/vendor/bin/phpunit)
+cd "$(dirname "$(readlink -f "${0}")")/../docker-symfony/" &&
+docker-compose exec php php -d memory_limit=128M /var/www/symfony/vendor/bin/phpunit
diff --git a/administration/total-clean.sh b/administration/total-clean.sh
index 47c2af2..fdfc5d2 100644
--- a/administration/total-clean.sh
+++ b/administration/total-clean.sh
@@ -1,4 +1,5 @@
 #!/bin/sh
-(cd $(dirname $(readlink -f ${0}))/../docker-symfony/ && docker-compose exec php rm -vr var)
-(cd $(dirname $(readlink -f ${0}))/../docker-symfony/ && docker-compose exec php rm -vr vendor )
-(cd $(dirname $(readlink -f ${0}))/ && bash cleanup-ignored.sh)
+cd "$(dirname "$(readlink -f "${0}")")/../docker-symfony/" || exit 1
+docker-compose exec php rm -vr var
+docker-compose exec php rm -vr vendor
+cd "$(dirname "$(readlink -f "${0}")")/" && bash cleanup-ignored.sh