diff --git a/Containers/mastercontainer/start.sh b/Containers/mastercontainer/start.sh
index dba54e12..0882ebd7 100644
--- a/Containers/mastercontainer/start.sh
+++ b/Containers/mastercontainer/start.sh
@@ -33,7 +33,7 @@ if [ "$*" != "" ]; then
 fi
 
 # Check if socket is available and readable
-if ! [ -a "/var/run/docker.sock" ]; then
+if ! [ -e "/var/run/docker.sock" ]; then
     print_red "Docker socket is not available. Cannot continue."
     echo "Please make sure to mount the docker socket into /var/run/docker.sock inside the container!"
     echo "If you did this by purpose because you don't want the container to have access to the docker socket, see https://github.com/nextcloud/all-in-one/tree/main/manual-install."
diff --git a/Containers/nextcloud/entrypoint.sh b/Containers/nextcloud/entrypoint.sh
index 1575fac1..433a4ea7 100644
--- a/Containers/nextcloud/entrypoint.sh
+++ b/Containers/nextcloud/entrypoint.sh
@@ -234,6 +234,7 @@ DATADIR_PERMISSION_CONF
             if [ -z "$POSTGRES_PORT" ]; then
               POSTGRES_PORT=5432
             fi
+            # shellcheck disable=SC2153
             INSTALL_OPTIONS+=(--database "$DATABASE_TYPE" --database-name "$POSTGRES_DB" --database-user "$POSTGRES_USER" --database-pass "$POSTGRES_PASSWORD" --database-host "$POSTGRES_HOST" --database-port "$POSTGRES_PORT")
 
             echo "Starting Nextcloud installation..."
diff --git a/Containers/watchtower/start.sh b/Containers/watchtower/start.sh
index bec4d3a2..cf16e7a4 100644
--- a/Containers/watchtower/start.sh
+++ b/Containers/watchtower/start.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 # Check if socket is available and readable
-if ! [ -a "/var/run/docker.sock" ]; then
+if ! [ -e "/var/run/docker.sock" ]; then
     echo "Docker socket is not available. Cannot continue."
     exit 1
 elif ! test -r /var/run/docker.sock; then