diff --git a/.github/lint-scripts.sh b/.github/lint-scripts.sh
deleted file mode 100755
index b03385df7..000000000
--- a/.github/lint-scripts.sh
+++ /dev/null
@@ -1,18 +0,0 @@
-#!/bin/sh
-#
-# lint bash scripts
-#
-
-set -o errexit
-
-CONFIG_DIR=".github"
-
-TMP_FILE="$(mktemp)"
-
-find "${CONFIG_DIR}" -type f -name "*.sh" > "${TMP_FILE}"
-
-while read -r FILE; do
-  echo lint "${FILE}"
-  shellcheck -x "${FILE}"
-done < "${TMP_FILE}"
-
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index b3a9a8234..0356df80d 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -4,19 +4,8 @@ on:
   pull_request
 
 jobs:
-  lint-bash-scripts:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v1
-      - name: Lint Bash scripts
-        uses: docker://koalaman/shellcheck-alpine:v0.7.0
-        with:
-          args: .github/lint-scripts.sh
-
   ci:
     runs-on: ubuntu-latest
-    needs: lint-bash-scripts
     services:
       mysql:
         image: mysql:5
diff --git a/contrib/backup/zammad_backup.sh b/contrib/backup/zammad_backup.sh
index 0e33ca328..b7f6d3259 100755
--- a/contrib/backup/zammad_backup.sh
+++ b/contrib/backup/zammad_backup.sh
@@ -4,10 +4,12 @@
 #
 
 PATH=/sbin:/bin:/usr/sbin:/usr/bin:
+# shellcheck disable=SC2046
 BACKUP_SCRIPT_PATH="$(dirname $(realpath $0))"
 
 if [ -f "${BACKUP_SCRIPT_PATH}/config" ]; then
   # Ensure we're inside of our Backup-Script folder (see issue 2508)
+  # shellcheck disable=SC2164
   cd "${BACKUP_SCRIPT_PATH}"
 
   # import config
diff --git a/contrib/backup/zammad_restore.sh b/contrib/backup/zammad_restore.sh
index 56a357cde..0166240e4 100755
--- a/contrib/backup/zammad_restore.sh
+++ b/contrib/backup/zammad_restore.sh
@@ -4,6 +4,7 @@
 #
 
 PATH=/sbin:/bin:/usr/sbin:/usr/bin:
+# shellcheck disable=SC2046
 BACKUP_SCRIPT_PATH="$(dirname $(realpath $0))"
 
 if [ -f "${BACKUP_SCRIPT_PATH}/config" ]; then
diff --git a/script/install.sh b/script/install.sh
index b51a9e17e..0360d45b2 100644
--- a/script/install.sh
+++ b/script/install.sh
@@ -22,7 +22,8 @@ function check_os()
     # Debian
     if [ -f /etc/debian_version ]; then
         OS=Debian
-        local MAJOR=$(cut -d. /etc/debian_version -f1)
+        local MAJOR
+        MAJOR=$(cut -d. /etc/debian_version -f1)
         if [ $MAJOR -lt 7 ]; then
             echo Please check the supported operating systems
             exit 1
@@ -54,9 +55,9 @@ fi
 HOMEDIR=$(getent passwd $USER | cut -d: -f 6)
 GROUP=$(id -gn $USER)
 
-cd "${HOMEDIR}"
+cd "${HOMEDIR}" || exit 1
 sudo -u "${USER}" -H git clone $REPOURL zammad
-cd zammad
+cd zammad || exit 1
 LATEST=$(git tag --list|sort|tail -1)
 git checkout tags/"${LATEST}"
 chown -R "${USER}":"${GROUP}" .
diff --git a/spec/fixtures/smime/generate/docker-entrypoint.sh b/spec/fixtures/smime/generate/docker-entrypoint.sh
index 212e9ffff..830749d7c 100755
--- a/spec/fixtures/smime/generate/docker-entrypoint.sh
+++ b/spec/fixtures/smime/generate/docker-entrypoint.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 echo "Zammad S/MIME test certificate generation"
 
@@ -79,6 +79,7 @@ do
 done
 
 echo "Generating from CA chain"
+# shellcheck disable=SC2043
 for EMAIL_ADDRESS in chain@example.com
 do
   if [[ ! -e "$CERT_DIR/$EMAIL_ADDRESS.crt" ]]
diff --git a/spec/fixtures/smime/generate/run.sh b/spec/fixtures/smime/generate/run.sh
index 0d5daaafd..fd89eae29 100755
--- a/spec/fixtures/smime/generate/run.sh
+++ b/spec/fixtures/smime/generate/run.sh
@@ -5,5 +5,4 @@ set -o pipefail
 
 docker build --no-cache -t zammad/smime-test-certificates:latest .
 
-docker run --rm -v `pwd`/../:/etc/ssl/certs zammad/smime-test-certificates:latest
-
+docker run --rm -v "$(pwd)/../:/etc/ssl/certs" zammad/smime-test-certificates:latest