diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 69da7cf..d9566c0 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,5 +1,7 @@
+# Run test against shells with "pre-commit run shellcheck --all-files"
 repos:
-  - repo: https://github.com/jumanjihouse/pre-commit-hooks
-    rev: 3.0.0
-    hooks:
-      - id: shellcheck
+    - repo: https://github.com/jumanjihouse/pre-commit-hooks
+      rev: 3.0.0
+      hooks:
+          - id: shellcheck
+            files: helpers/shells/
diff --git a/helpers/shells/deleteRepo.sh b/helpers/shells/deleteRepo.sh
index 8883193..c725908 100755
--- a/helpers/shells/deleteRepo.sh
+++ b/helpers/shells/deleteRepo.sh
@@ -36,12 +36,12 @@ fi
 # Delete the repository and the line associated in the authorized_keys file
 if [ -d "${pool}/${repositoryName}" ]; then
         # Delete the repository
-        rm -rf "${pool}/${repositoryName}"
+        rm -rf """${pool}""/""${repositoryName:?}"""
         # Delete the line in the authorized_keys file
         sed -i "/${repositoryName}/d" "${authorized_keys}"
-        echo -n "The folder "${pool}/${repositoryName}" and all its data have been deleted. The line associated in the authorized_keys file has been deleted."
+        echo -n "The folder ""${pool}"/"${repositoryName}"" and all its data have been deleted. The line associated in the authorized_keys file has been deleted."
 else
         # Delete the line in the authorized_keys file
         sed -i "/${repositoryName}/d" "${authorized_keys}"
-        echo -n "The folder "${pool}/${repositoryName}" did not exist (repository never initialized or used). The line associated in the authorized_keys file has been deleted."
+        echo -n "The folder ""${pool}"/"${repositoryName}"" did not exist (repository never initialized or used). The line associated in the authorized_keys file has been deleted."
 fi
\ No newline at end of file
diff --git a/helpers/shells/getLastSave.sh b/helpers/shells/getLastSave.sh
index a7ca79f..0c7d58b 100755
--- a/helpers/shells/getLastSave.sh
+++ b/helpers/shells/getLastSave.sh
@@ -26,9 +26,9 @@ fi
 # Default value if .env not exists
 : "${home:=/home/borgwarehouse}"
 
-if [ -n "$(find ${home}/repos -mindepth 1 -maxdepth 1 -type d)" ]; then
+if [ -n "$(find "${home}"/repos -mindepth 1 -maxdepth 1 -type d)" ]; then
   stat --format='{"repositoryName":"%n","lastSave":%Y}' \
-  ${home}/repos/*/integrity* | 
+  "${home}"/repos/*/integrity* | 
   jq --slurp '[.[] | .repositoryName = (.repositoryName | split("/")[-2])]'
 else
     echo "[]"
diff --git a/helpers/shells/getStorageUsed.sh b/helpers/shells/getStorageUsed.sh
index 106c758..682413f 100755
--- a/helpers/shells/getStorageUsed.sh
+++ b/helpers/shells/getStorageUsed.sh
@@ -23,5 +23,5 @@ fi
 : "${home:=/home/borgwarehouse}"
 
 # Use jc to output a JSON format with du command
-cd ${home}/repos
+cd "${home}"/repos
 du -s -- * | jc --du
diff --git a/helpers/shells/updateRepo.sh b/helpers/shells/updateRepo.sh
index 400bc7b..9faae6f 100755
--- a/helpers/shells/updateRepo.sh
+++ b/helpers/shells/updateRepo.sh
@@ -50,7 +50,7 @@ regex="command=\".*${repositoryName}.*\",restrict"
 while IFS= read -r line; do
     if [[ $line =~ $pattern ]]; then
         # Get the SSH pub key of the line (ignore the comment)
-        key1=$(echo ${BASH_REMATCH[0]} | awk '{print $1 " " $2}')
+        key1=$(echo "${BASH_REMATCH[0]}" | awk '{print $1 " " $2}')
         # Get the SSH pub key of the new SSH pub key (ignore the comment)
         key2=$(echo "$2" | awk '{print $1 " " $2}')