diff --git a/Dockerfile b/Dockerfile
index 54c9c64..f9dcea2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -68,9 +68,13 @@ WORKDIR /root
 
 RUN set -e; \
   echo "Setting up prerequisites"; \
-  yum makecache && yum install -yy bash
+  yum makecache && yum install -yy bash; \\
+  BASH_CMD="$(command -v bash 2>/dev/null|| true)"; \
+  [ -x "$BASH_CMD" ] && { rm -rf "/bin/sh" || true; } && ln -sf "$BASH_CMD" "/bin/sh" || true; \
+  [ -n "$BASH_CMD" ] && sed -i 's|root:x:.*|root:x:0:0:root:/root:'$BASH_CMD'|g' "/etc/passwd" || true
 
 ENV SHELL="/bin/bash"
+SHELL [ "/bin/bash", "-c" ]
 
 COPY ./rootfs/usr/local/bin/pkmgr /usr/local/bin/pkmgr
 COPY --from=gosu /usr/local/bin/gosu /usr/local/bin/gosu
@@ -111,15 +115,12 @@ RUN echo "Updating system files "; \
   touch "/etc/profile" "/root/.profile"; \
   echo 'hosts: files dns' >"/etc/nsswitch.conf"; \
   [ "$PHP_VERSION" = "system" ] && PHP_VERSION="php" || true; \
-  BASH_CMD="$(command -v bash 2>/dev/null|| true)"; \
   PHP_BIN="$(command -v ${PHP_VERSION} 2>/dev/null || true)"; \
   PHP_FPM="$(ls /usr/*bin/php*fpm* 2>/dev/null || true)"; \
   pip_bin="$(command -v python3 2>/dev/null || command -v python2 2>/dev/null || command -v python 2>/dev/null || true)"; \
   py_version="$(command $pip_bin --version | sed 's|[pP]ython ||g' | awk -F '.' '{print $1$2}' | grep '[0-9]' || true)"; \
   [ "$py_version" -gt "310" ] && pip_opts="--break-system-packages " || pip_opts=""; \
   if [ -n "$pip_bin" ];then $pip_bin -m pip install certbot-dns-rfc2136 certbot-dns-duckdns certbot-dns-cloudflare certbot-nginx $pip_opts || true;fi; \
-  [ -f "$BASH_CMD" ] && { rm -rf "/bin/sh" || true; } && ln -sf "$BASH_CMD" "/bin/sh" || true; \
-  [ -n "$BASH_CMD" ] && sed -i 's|root:x:.*|root:x:0:0:root:/root:'$BASH_CMD'|g' "/etc/passwd" || true; \
   [ -f "/usr/share/zoneinfo/${TZ}" ] && ln -sf "/usr/share/zoneinfo/${TZ}" "/etc/localtime" || true; \
   [ -n "$PHP_BIN" ] && [ -z "$(command -v php 2>/dev/null)" ] && ln -sf "$PHP_BIN" "/usr/bin/php" 2>/dev/null || true; \
   [ -n "$PHP_FPM" ] && [ -z "$(command -v php-fpm 2>/dev/null)" ] && ln -sf "$PHP_FPM" "/usr/bin/php-fpm" 2>/dev/null || true; \
diff --git a/Dockerfile.8 b/Dockerfile.8
index b672310..eef8418 100644
--- a/Dockerfile.8
+++ b/Dockerfile.8
@@ -68,9 +68,13 @@ WORKDIR /root
 
 RUN set -e; \
   echo "Setting up prerequisites"; \
-  yum makecache && yum install -yy bash
+  yum makecache && yum install -yy bash; \\
+  BASH_CMD="$(command -v bash 2>/dev/null|| true)"; \
+  [ -x "$BASH_CMD" ] && { rm -rf "/bin/sh" || true; } && ln -sf "$BASH_CMD" "/bin/sh" || true; \
+  [ -n "$BASH_CMD" ] && sed -i 's|root:x:.*|root:x:0:0:root:/root:'$BASH_CMD'|g' "/etc/passwd" || true
 
 ENV SHELL="/bin/bash"
+SHELL [ "/bin/bash", "-c" ]
 
 COPY ./rootfs/usr/local/bin/pkmgr /usr/local/bin/pkmgr
 COPY --from=gosu /usr/local/bin/gosu /usr/local/bin/gosu
@@ -111,15 +115,12 @@ RUN echo "Updating system files "; \
   touch "/etc/profile" "/root/.profile"; \
   echo 'hosts: files dns' >"/etc/nsswitch.conf"; \
   [ "$PHP_VERSION" = "system" ] && PHP_VERSION="php" || true; \
-  BASH_CMD="$(command -v bash 2>/dev/null|| true)"; \
   PHP_BIN="$(command -v ${PHP_VERSION} 2>/dev/null || true)"; \
   PHP_FPM="$(ls /usr/*bin/php*fpm* 2>/dev/null || true)"; \
   pip_bin="$(command -v python3 2>/dev/null || command -v python2 2>/dev/null || command -v python 2>/dev/null || true)"; \
   py_version="$(command $pip_bin --version | sed 's|[pP]ython ||g' | awk -F '.' '{print $1$2}' | grep '[0-9]' || true)"; \
   [ "$py_version" -gt "310" ] && pip_opts="--break-system-packages " || pip_opts=""; \
   if [ -n "$pip_bin" ];then $pip_bin -m pip install certbot-dns-rfc2136 certbot-dns-duckdns certbot-dns-cloudflare certbot-nginx $pip_opts || true;fi; \
-  [ -f "$BASH_CMD" ] && { rm -rf "/bin/sh" || true; } && ln -sf "$BASH_CMD" "/bin/sh" || true; \
-  [ -n "$BASH_CMD" ] && sed -i 's|root:x:.*|root:x:0:0:root:/root:'$BASH_CMD'|g' "/etc/passwd" || true; \
   [ -f "/usr/share/zoneinfo/${TZ}" ] && ln -sf "/usr/share/zoneinfo/${TZ}" "/etc/localtime" || true; \
   [ -n "$PHP_BIN" ] && [ -z "$(command -v php 2>/dev/null)" ] && ln -sf "$PHP_BIN" "/usr/bin/php" 2>/dev/null || true; \
   [ -n "$PHP_FPM" ] && [ -z "$(command -v php-fpm 2>/dev/null)" ] && ln -sf "$PHP_FPM" "/usr/bin/php-fpm" 2>/dev/null || true; \
diff --git a/Dockerfile.9 b/Dockerfile.9
index 411acc1..bb1c30e 100644
--- a/Dockerfile.9
+++ b/Dockerfile.9
@@ -68,9 +68,13 @@ WORKDIR /root
 
 RUN set -e; \
   echo "Setting up prerequisites"; \
-  yum makecache && yum install -yy bash
+  yum makecache && yum install -yy bash; \\
+  BASH_CMD="$(command -v bash 2>/dev/null|| true)"; \
+  [ -x "$BASH_CMD" ] && { rm -rf "/bin/sh" || true; } && ln -sf "$BASH_CMD" "/bin/sh" || true; \
+  [ -n "$BASH_CMD" ] && sed -i 's|root:x:.*|root:x:0:0:root:/root:'$BASH_CMD'|g' "/etc/passwd" || true
 
 ENV SHELL="/bin/bash"
+SHELL [ "/bin/bash", "-c" ]
 
 COPY ./rootfs/usr/local/bin/pkmgr /usr/local/bin/pkmgr
 COPY --from=gosu /usr/local/bin/gosu /usr/local/bin/gosu
@@ -111,15 +115,12 @@ RUN echo "Updating system files "; \
   touch "/etc/profile" "/root/.profile"; \
   echo 'hosts: files dns' >"/etc/nsswitch.conf"; \
   [ "$PHP_VERSION" = "system" ] && PHP_VERSION="php" || true; \
-  BASH_CMD="$(command -v bash 2>/dev/null|| true)"; \
   PHP_BIN="$(command -v ${PHP_VERSION} 2>/dev/null || true)"; \
   PHP_FPM="$(ls /usr/*bin/php*fpm* 2>/dev/null || true)"; \
   pip_bin="$(command -v python3 2>/dev/null || command -v python2 2>/dev/null || command -v python 2>/dev/null || true)"; \
   py_version="$(command $pip_bin --version | sed 's|[pP]ython ||g' | awk -F '.' '{print $1$2}' | grep '[0-9]' || true)"; \
   [ "$py_version" -gt "310" ] && pip_opts="--break-system-packages " || pip_opts=""; \
   if [ -n "$pip_bin" ];then $pip_bin -m pip install certbot-dns-rfc2136 certbot-dns-duckdns certbot-dns-cloudflare certbot-nginx $pip_opts || true;fi; \
-  [ -f "$BASH_CMD" ] && { rm -rf "/bin/sh" || true; } && ln -sf "$BASH_CMD" "/bin/sh" || true; \
-  [ -n "$BASH_CMD" ] && sed -i 's|root:x:.*|root:x:0:0:root:/root:'$BASH_CMD'|g' "/etc/passwd" || true; \
   [ -f "/usr/share/zoneinfo/${TZ}" ] && ln -sf "/usr/share/zoneinfo/${TZ}" "/etc/localtime" || true; \
   [ -n "$PHP_BIN" ] && [ -z "$(command -v php 2>/dev/null)" ] && ln -sf "$PHP_BIN" "/usr/bin/php" 2>/dev/null || true; \
   [ -n "$PHP_FPM" ] && [ -z "$(command -v php-fpm 2>/dev/null)" ] && ln -sf "$PHP_FPM" "/usr/bin/php-fpm" 2>/dev/null || true; \