diff --git a/automated/doc/test-writting-guidelines.rst b/automated/doc/test-writting-guidelines.rst
index 656f827..eb422f6 100644
--- a/automated/doc/test-writting-guidelines.rst
+++ b/automated/doc/test-writting-guidelines.rst
@@ -107,9 +107,9 @@
 
     dist_name
     case "${dist}" in
-      Debian|Ubuntu) install_deps "lsb-release" "${SKIP_INSTALL}" ;;
-      Fedora|CentOS) install_deps "redhat-lsb-core" "${SKIP_INSTALL}" ;;
-      Unknown) warn_msg "Unsupported distro: package install skipped" ;;
+      debian|ubuntu) install_deps "lsb-release" "${SKIP_INSTALL}" ;;
+      fedora|centos) install_deps "redhat-lsb-core" "${SKIP_INSTALL}" ;;
+      unknown) warn_msg "Unsupported distro: package install skipped" ;;
     esac
 
 Except automated package installation, you may also need to download and install
@@ -121,9 +121,9 @@
     if [ "${SKIP_INSTALL}" = "true" ] || [ "${SKIP_INSTALL}" = "True" ]; then
         dist_name
         case "${dist}" in
-            Debian|Ubuntu) install_deps "${pkgs}" ;;
-            Fedora|CentOS) install_deps "${pkgs}" ;;
-            Unknown) warn_msg "Unsupported distro: package install skipped" ;;
+            debian|ubuntu) install_deps "${pkgs}" ;;
+            fedora|centos) install_deps "${pkgs}" ;;
+            unknown) warn_msg "Unsupported distro: package install skipped" ;;
         esac
 
         # manually install steps.
diff --git a/automated/lib/sh-test-lib b/automated/lib/sh-test-lib
index 32c481f..6aac8a7 100755
--- a/automated/lib/sh-test-lib
+++ b/automated/lib/sh-test-lib
@@ -160,21 +160,21 @@
         # shellcheck disable=SC1091
         dist="$(. /etc/lsb-release && echo "${DISTRIB_ID}")"
     elif [ -f /etc/debian_version ]; then
-        dist="Debian"
+        dist="debian"
     elif [ -f /etc/fedora-release ]; then
-        dist="Fedora"
+        dist="fedora"
     elif [ -f /etc/centos-release ]; then
-        dist="CentOS"
+        dist="centos"
     else
-        dist="Unknown"
+        dist="unknown"
         warn_msg "Unsupported distro: cannot determine distribution name"
     fi
 
     case "${dist}" in
-        debian) dist="Debian" ;;
-        ubuntu) dist="Ubuntu" ;;
-        fedora) dist="Fedora" ;;
-        centos) dist="CentOS" ;;
+        Debian) dist="debian" ;;
+        Ubuntu) dist="ubuntu" ;;
+        Fedora) dist="fedora" ;;
+        CentOS) dist="centos" ;;
         rpb|rpb-wayland|rpb-eglfs) dist="oe-based" ;;
     esac
 }
@@ -191,21 +191,21 @@
         info_msg "Installing ${pkgs}"
         dist_name
         case "${dist}" in
-          Debian|Ubuntu)
+          debian|ubuntu)
             # Use the default answers for all questions.
             DEBIAN_FRONTEND=noninteractive apt-get update -q -y
             # shellcheck disable=SC2086
             DEBIAN_FRONTEND=noninteractive apt-get install -q -y ${pkgs}
             ;;
-          CentOS)
+          centos)
             # shellcheck disable=SC2086
             yum -e 0 -y install ${pkgs}
             ;;
-          Fedora)
+          fedora)
             # shellcheck disable=SC2086
             dnf -e 0 -y install ${pkgs}
             ;;
-          Unknown)
+          unknown)
             warn_msg "Unsupported distro: package install skipped"
             ;;
         esac
@@ -268,8 +268,8 @@
     if ! command -v lsb_release > /dev/null; then
         dist_name
         case "${dist}" in
-          Debian|Ubuntu) install_deps "lsb-release" ;;
-          CentOS|Fedora) install_deps "redhat-lsb-core" ;;
+          debian|ubuntu) install_deps "lsb-release" ;;
+          centos|fedora) install_deps "redhat-lsb-core" ;;
           *) warn_msg "Unsupported distro: dist_info skipped"
         esac
     fi
@@ -285,8 +285,8 @@
 
     dist_name
     case "${dist}" in
-      Debian|Ubuntu) wget -O - "${url}" | apt-key add - ;;
-      CentOS|Fedora) infor_msg "add_key isn't needed on ${dist}" ;;
+      debian|ubuntu) wget -O - "${url}" | apt-key add - ;;
+      centos|fedora) infor_msg "add_key isn't needed on ${dist}" ;;
       *) warn_msg "Unsupported distro: add_key skipped"
     esac
 }
@@ -299,7 +299,7 @@
     case "${dist}" in
       # Detect Debian/Ubuntu codename and add repo automatically. The same url
       # should work on all distributions supported by the repo.
-      Debian|Ubuntu)
+      debian|ubuntu)
         dist_info
         if [ -z "$2" ]; then
             backports=""
@@ -314,7 +314,7 @@
         ;;
       # It is not easy to amend url with distro version as its format may vary
       # by repo. Test definition/plan should provide a correct repo url.
-      CentOS|Fedora)
+      centos|fedora)
         wget -O - "${url}" >> "/etc/yum.repos.d/3rd-party.repo"
         ;;
       *)
diff --git a/automated/linux/apache-apache-bench/apache-bench.sh b/automated/linux/apache-apache-bench/apache-bench.sh
index 551ce7f..2395efc 100755
--- a/automated/linux/apache-apache-bench/apache-bench.sh
+++ b/automated/linux/apache-apache-bench/apache-bench.sh
@@ -35,12 +35,12 @@
     dist_name
     # shellcheck disable=SC2154
     case "${dist}" in
-      Debian|Ubuntu)
+      debian|ubuntu)
         pkgs="apache2 apache2-utils"
         install_deps "${pkgs}"
         systemctl restart apache2
         ;;
-      CentOS|Fedora)
+      centos|fedora)
         pkgs="httpd httpd-tools"
         install_deps "${pkgs}"
         systemctl start httpd.service
diff --git a/automated/linux/docker/docker.sh b/automated/linux/docker/docker.sh
index eb23e56..bebf482 100755
--- a/automated/linux/docker/docker.sh
+++ b/automated/linux/docker/docker.sh
@@ -26,8 +26,8 @@
 dist_name
 # shellcheck disable=SC2154
 case "${dist}" in
-    Debian|Ubuntu) pkgs="docker-engine" ;;
-    Fedora|CentOS) pkgs="docker" ;;
+    debian|ubuntu) pkgs="docker-engine" ;;
+    fedora|centos) pkgs="docker" ;;
     *) error_msg "Unsupported distribution" ;;
 esac
 
diff --git a/automated/linux/dsdbench/dsdbench.sh b/automated/linux/dsdbench/dsdbench.sh
index e403a40..4b8f4cf 100755
--- a/automated/linux/dsdbench/dsdbench.sh
+++ b/automated/linux/dsdbench/dsdbench.sh
@@ -26,8 +26,8 @@
 dist_name
 # shellcheck disable=SC2154
 case "${dist}" in
-    Debian|Ubuntu) pkgs="git golang libdevmapper-dev" ;;
-    Fedora|CentOS) pkgs="git golang device-mapper-devel" ;;
+    debian|ubuntu) pkgs="git golang libdevmapper-dev" ;;
+    fedora|centos) pkgs="git golang device-mapper-devel" ;;
 esac
 install_deps "${pkgs}" "${SKIP_INSTALL}"
 
diff --git a/automated/linux/fio-test/fio-test.sh b/automated/linux/fio-test/fio-test.sh
index 90e7b4a..4a70756 100755
--- a/automated/linux/fio-test/fio-test.sh
+++ b/automated/linux/fio-test/fio-test.sh
@@ -40,11 +40,11 @@
     dist_name
     # shellcheck disable=SC2154
     case "${dist}" in
-      Debian|Ubuntu)
+      debian|ubuntu)
         pkgs="fio"
         install_deps "${pkgs}" "${SKIP_INSTALL}"
         ;;
-      Fedora|CentOS)
+      fedora|centos)
         pkgs="libaio-devel gcc tar wget"
         install_deps "${pkgs}" "${SKIP_INSTALL}"
         fio_build_install
diff --git a/automated/linux/iperf/iperf.sh b/automated/linux/iperf/iperf.sh
index f2ad3d1..0dd230f 100755
--- a/automated/linux/iperf/iperf.sh
+++ b/automated/linux/iperf/iperf.sh
@@ -43,10 +43,10 @@
     dist_name
     # shellcheck disable=SC2154
     case "${dist}" in
-        Debian|Ubuntu|Fedora)
+        debian|ubuntu|fedora)
             install_deps "iperf3"
             ;;
-        CentOS)
+        centos)
             install_deps "wget gcc make"
             wget https://github.com/esnet/iperf/archive/"${VERSION}".tar.gz
             tar xf "${VERSION}".tar.gz
diff --git a/automated/linux/kernel-compilation/kernel-compilation.sh b/automated/linux/kernel-compilation/kernel-compilation.sh
index 7040e93..b9b8d2a 100755
--- a/automated/linux/kernel-compilation/kernel-compilation.sh
+++ b/automated/linux/kernel-compilation/kernel-compilation.sh
@@ -25,8 +25,8 @@
 dist_name
 # shellcheck disable=SC2154
 case "${dist}" in
-    Debian|Ubuntu) pkgs="wget time bc xz-utils build-essential" ;;
-    CentOS|Fedora) pkgs="wget time bc xz gcc make" ;;
+    debian|ubuntu) pkgs="wget time bc xz-utils build-essential" ;;
+    centos|fedora) pkgs="wget time bc xz gcc make" ;;
 esac
 ! check_root && error_msg "You need to be root to install packages!"
 # install_deps supports the above distributions.
diff --git a/automated/linux/lamp/lamp.sh b/automated/linux/lamp/lamp.sh
index c25b1c1..f2197a1 100755
--- a/automated/linux/lamp/lamp.sh
+++ b/automated/linux/lamp/lamp.sh
@@ -34,10 +34,10 @@
     dist_name
     # shellcheck disable=SC2154
     case "${dist}" in
-      Debian|Ubuntu)
-        if [ "${dist}" = "Debian" ]; then
+      debian|ubuntu)
+        if [ "${dist}" = "debian" ]; then
             pkgs="apache2 mysql-server php5-mysql php5-common libapache2-mod-php5"
-        elif [ "${dist}" = "Ubuntu" ]; then
+        elif [ "${dist}" = "ubuntu" ]; then
             pkgs="apache2 mysql-server php-mysql php-common libapache2-mod-php"
         fi
         install_deps "curl ${pkgs}"
@@ -45,7 +45,7 @@
         systemctl restart apache2
         systemctl restart mysql
         ;;
-      CentOS|Fedora)
+      centos|fedora)
         pkgs="httpd mariadb-server mariadb php php-mysql"
         install_deps "curl ${pkgs}"
         systemctl start httpd.service
diff --git a/automated/linux/lemp/lemp.sh b/automated/linux/lemp/lemp.sh
index 92a4f28..06be62f 100755
--- a/automated/linux/lemp/lemp.sh
+++ b/automated/linux/lemp/lemp.sh
@@ -18,7 +18,7 @@
 # systemctl available on Debian 8, CentOS 7 and newer releases.
 # shellcheck disable=SC2154
 case "${dist}" in
-    Debian)
+    debian)
         pkgs="nginx mysql-server php5-mysql php5-fpm curl"
         install_deps "${pkgs}"
 
@@ -38,7 +38,7 @@
         cp ./debian-nginx.conf /etc/nginx/sites-available/default
         systemctl restart nginx
         ;;
-    CentOS)
+    centos)
         # x86_64 nginx package can be installed from epel repo. However, epel
         # project doesn't support ARM arch yet. RPB repo should provide nginx.
         [ "$(uname -m)" = "x86_64" ] && install_deps "epel-release"
@@ -142,11 +142,11 @@
 mv /usr/share/nginx/html.bak /usr/share/nginx/html
 # shellcheck disable=SC2154
 case "${dist}" in
-    Debian)
+    debian)
         mv -f /etc/php5/fpm/php.ini.bak /etc/php5/fpm/php.ini
         mv -f /etc/nginx/sites-available/default.bak /etc/nginx/sites-available/default
         ;;
-    CentOS)
+    centos)
         mv -f /etc/php.ini.bak /etc/php.ini
         rm -f /etc/nginx/default.d/default.conf
         ;;
diff --git a/automated/linux/libhugetlbfs/libhugetlbfs.sh b/automated/linux/libhugetlbfs/libhugetlbfs.sh
index 252dc1c..9d6db37 100755
--- a/automated/linux/libhugetlbfs/libhugetlbfs.sh
+++ b/automated/linux/libhugetlbfs/libhugetlbfs.sh
@@ -84,11 +84,11 @@
     dist_name
     # shellcheck disable=SC2154
     case "${dist}" in
-      Debian|Ubuntu)
+      debian|ubuntu)
         pkgs="binutils gcc make python sed tar wget"
         install_deps "${pkgs}" "${SKIP_INSTALL}"
         ;;
-      Fedora|CentOS)
+      fedora|centos)
         pkgs="binutils gcc glibc-static make python sed tar wget"
         install_deps "${pkgs}" "${SKIP_INSTALL}"
         ;;
diff --git a/automated/linux/ltp-realtime/ltp-realtime.sh b/automated/linux/ltp-realtime/ltp-realtime.sh
index 0fcd40c..fda708a 100755
--- a/automated/linux/ltp-realtime/ltp-realtime.sh
+++ b/automated/linux/ltp-realtime/ltp-realtime.sh
@@ -73,11 +73,11 @@
     dist_name
     # shellcheck disable=SC2154
     case "${dist}" in
-      Debian|Ubuntu)
+      debian|ubuntu)
         pkgs="xz-utils flex bison build-essential wget curl net-tools"
         install_deps "${pkgs}" "${SKIP_INSTALL}"
         ;;
-      CentOS|Fedora)
+      centos|fedora)
         pkgs="xz flex bison make automake gcc gcc-c++ kernel-devel wget curl net-tools"
         install_deps "${pkgs}" "${SKIP_INSTALL}"
         ;;
diff --git a/automated/linux/ltp/ltp.sh b/automated/linux/ltp/ltp.sh
index e015b3d..7788d81 100755
--- a/automated/linux/ltp/ltp.sh
+++ b/automated/linux/ltp/ltp.sh
@@ -92,11 +92,11 @@
     dist_name
     # shellcheck disable=SC2154
     case "${dist}" in
-      Debian|Ubuntu)
+      debian|ubuntu)
         pkgs="xz-utils flex bison build-essential wget curl net-tools"
         install_deps "${pkgs}" "${SKIP_INSTALL}"
         ;;
-      CentOS|Fedora)
+      centos|fedora)
         pkgs="xz flex bison make automake gcc gcc-c++ kernel-devel wget curl net-tools"
         install_deps "${pkgs}" "${SKIP_INSTALL}"
         ;;
diff --git a/automated/linux/nginx-apache-bench/apache-bench.sh b/automated/linux/nginx-apache-bench/apache-bench.sh
index f4c774c..88752e6 100755
--- a/automated/linux/nginx-apache-bench/apache-bench.sh
+++ b/automated/linux/nginx-apache-bench/apache-bench.sh
@@ -32,7 +32,7 @@
 # systemctl available on Debian 8, CentOS 7 and newer releases.
 # shellcheck disable=SC2154
 case "${dist}" in
-    Debian)
+    debian)
         pkgs="nginx apache2-utils"
         install_deps "${pkgs}" "${SKIP_INSTALL}"
 
@@ -41,7 +41,7 @@
 
         systemctl restart nginx
         ;;
-    CentOS)
+    centos)
         # x86_64 nginx package can be installed from epel repo. However, epel
         # project doesn't support ARM arch yet. RPB repo should provide nginx.
         [ "$(uname -m)" = "x86_64" ] && install_deps "epel-release" "${SKIP_INSTALL}"
diff --git a/automated/linux/openjdk/openjdk-smoke.sh b/automated/linux/openjdk/openjdk-smoke.sh
index 7202a85..29e9c28 100755
--- a/automated/linux/openjdk/openjdk-smoke.sh
+++ b/automated/linux/openjdk/openjdk-smoke.sh
@@ -27,8 +27,8 @@
 else
     dist_name
     case "${dist}" in
-      Debian|Ubuntu) pkg="openjdk-${VERSION}-jdk" ;;
-      CentOS|Fedora) pkg="java-1.${VERSION}.0-openjdk-devel" ;;
+      debian|ubuntu) pkg="openjdk-${VERSION}-jdk" ;;
+      centos|fedora) pkg="java-1.${VERSION}.0-openjdk-devel" ;;
       *) error_msg "Unsupported distribution" ;;
     esac
     install_deps "${pkg}"
diff --git a/automated/linux/smoke/smoke.sh b/automated/linux/smoke/smoke.sh
index 32f71b0..96f68f9 100755
--- a/automated/linux/smoke/smoke.sh
+++ b/automated/linux/smoke/smoke.sh
@@ -22,9 +22,9 @@
     dist_name
     # shellcheck disable=SC2154
     case "${dist}" in
-      Debian|Ubuntu) install_deps "lsb-release" "${SKIP_INSTALL}";;
-      Fedora|CentOS) install_deps "redhat-lsb-core" "${SKIP_INSTALL}";;
-      Unknown) warn_msg "Unsupported distro: package install skipped" ;;
+      debian|ubuntu) install_deps "lsb-release" "${SKIP_INSTALL}";;
+      fedora|centos) install_deps "redhat-lsb-core" "${SKIP_INSTALL}";;
+      unknown) warn_msg "Unsupported distro: package install skipped" ;;
     esac
 }
 
diff --git a/automated/linux/sysbench/sysbench.sh b/automated/linux/sysbench/sysbench.sh
index 6c54a84..9aa420d 100755
--- a/automated/linux/sysbench/sysbench.sh
+++ b/automated/linux/sysbench/sysbench.sh
@@ -56,7 +56,7 @@
     dist_name
     # shellcheck disable=SC2154
     case "${dist}" in
-        Debian|Ubuntu)
+        debian|ubuntu)
             install_deps "git build-essential automake libtool"
             if echo "${TESTS}" | grep "oltp"; then
                 install_deps "libmysqlclient-dev mysql-server"
@@ -66,7 +66,7 @@
                 install_sysbench "--without-mysql"
             fi
             ;;
-        Fedora|CentOS)
+        fedora|centos)
             install_deps "git gcc make automake libtool"
             if echo "${TESTS}" | grep "oltp"; then
                 install_deps "mysql-devel mariadb-server mariadb"
@@ -76,7 +76,7 @@
                 install_sysbench "--without-mysql"
             fi
             ;;
-        Unknown)
+        unknown)
             warn_msg "Unsupported distro: package install skipped"
             ;;
     esac
diff --git a/automated/linux/toolchain-smoke/toolchain-smoke.sh b/automated/linux/toolchain-smoke/toolchain-smoke.sh
index 2dc76ed..7cdead1 100755
--- a/automated/linux/toolchain-smoke/toolchain-smoke.sh
+++ b/automated/linux/toolchain-smoke/toolchain-smoke.sh
@@ -24,9 +24,9 @@
     dist_name
     # shellcheck disable=SC2154
     case "${dist}" in
-      Debian|Ubuntu) install_deps "build-essential" "${SKIP_INSTALL}" ;;
-      Fedora|CentOS) install_deps "gcc glibc-static" "${SKIP_INSTALL}" ;;
-      Unknown) warn_msg "Unsupported distro: package install skipped" ;;
+      debian|ubuntu) install_deps "build-essential" "${SKIP_INSTALL}" ;;
+      fedora|centos) install_deps "gcc glibc-static" "${SKIP_INSTALL}" ;;
+      unknown) warn_msg "Unsupported distro: package install skipped" ;;
     esac
 }
 
diff --git a/automated/linux/ui-browser-test/ui-browser-test.sh b/automated/linux/ui-browser-test/ui-browser-test.sh
index 9d7b377..44e886b 100755
--- a/automated/linux/ui-browser-test/ui-browser-test.sh
+++ b/automated/linux/ui-browser-test/ui-browser-test.sh
@@ -59,7 +59,7 @@
 mkdir -p "${OUTPUT}"
 
 dist_name
-if [ "${dist}" = "Debian" ] || [ "${dist}" = "Ubuntu" ]; then
+if [ "${dist}" = "debian" ] || [ "${dist}" = "ubuntu" ]; then
     "${WD}"/install-on-debian.sh
 else
     echo "Not a debian machine"