diff --git a/Makefile b/Makefile
index ecee427..0f13438 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-# Autogenerated at 14.04.2023 12:03 using ./gen-makefile
+# Autogenerated at 18.04.2023 15:28 using ./gen-makefile
 .DEFAULT_GOAL := help
 
 #===============================================
@@ -109,7 +109,7 @@ omz-clean:
 omz-fancy:
 	@./install/omz-fancy
 
-##openvpn: Install openvpn v2.5.8 (src)
+##openvpn: Install openvpn v2.6.3 (src)
 openvpn:
 	@./install/openvpn
 
diff --git a/helpers b/helpers
index de317a7..059dea5 100644
--- a/helpers
+++ b/helpers
@@ -4,6 +4,40 @@ installed() {
     command -v "$1" >/dev/null 2>&1
 }
 
+installed2() {
+    dpkg --list | grep -qw "ii  $1"
+}
+
+apt_install() {
+    sudo apt install -y --autoremove "$*"
+}
+
+require() {
+    sw=()
+    for package in "$@"; do
+        if ! installed "$package" && ! installed2 "$package"; then
+            sw+=("$package")
+        fi
+    done
+    if [ ${#sw[@]} -gt 0 ]; then
+        info "This packages will be installed in your system:\n${sw[*]}"
+        apt_install "${sw[*]}"
+        [ $? -gt 0 ] && die "installation cancelled" 201
+    fi
+}
+
+require2() {
+    sw=()
+    for package in "$@"; do
+        if ! installed "$package" && ! installed2 "$package"; then
+            sw+=("$package")
+        fi
+    done
+    if [ ${#sw[@]} -gt 0 ]; then
+        die "This packages must be installed in your system:\n${sw[*]}" 200
+    fi
+}
+
 title() {
     [ "$1" ] && title="$1" || title="$(grep -m 1 -oP "(?<=^##makedesc:\s).*$" ${BASH_SOURCE[1]})"
     info
@@ -13,20 +47,17 @@ title() {
     info
 }
 
-require() {
-    if ! installed "$1"; then
-        if [ "$2" ]; then
-            die "'$1' must to be installed in your system" 200
-        else
-            info "Installing '$1' because it is required to continue"
-            sudo apt install "$1"
-            [ $? -gt 0 ] && die "installation cancelled" 201
-        fi
-    fi
+unpak_targz() {
+    require tar
+    tar -xzf "$1" -C "$2"
+}
+
+symlink() {
+    ln -sf "$1" "$2"
 }
 
 download() {
-    require wget 1
+    require wget
     wget "$1" -O "$2"
 }
 
@@ -35,6 +66,11 @@ clone() {
     git clone $*
 }
 
+clone_quick() {
+    require git
+    git clone $* --depth=1 --single-branch
+}
+
 abspath() {
     echo $(realpath -q "${1/#\~/$HOME}")
 }
@@ -159,7 +195,6 @@ warn() {
 
 error() {
     print "${BOLD}${BLRED}${FWHITE}${IERROR} Error: ${BRESET}${FLRED} $1 " >&2
-    # print_stacktrace
 }
 
 fatal() {
@@ -168,19 +203,8 @@ fatal() {
 }
 
 die() {
-    error "$1"
-    [ "$2" ] && exit $2 || exit 100
-}
-
-die_fatal() {
-    fatal "$1"
-    [ "$2" ] && exit $2 || exit 100
-}
-
-die_help() {
-    error "$1"
-    [ "$2" ] && is_function "$2".help && $2.help
-    [ "$3" ] && exit $3 || exit 100
+    error "${1:-halted}"
+    exit ${2:-100}
 }
 
 print_stacktrace() {
diff --git a/install/jbmono b/install/jbmono
index fce07ff..b0f4173 100755
--- a/install/jbmono
+++ b/install/jbmono
@@ -5,10 +5,10 @@ source `dirname $0`/../helpers || exit 255
 # https://www.jetbrains.com/lp/mono/#how-to-install
 
 title
+
 require unzip
 
 mkdir -p "$HOME/install/jbmono" "$HOME/.local/share/fonts/"
-
 download "https://download.jetbrains.com/fonts/JetBrainsMono-2.304.zip" "$HOME/install/jbmono.zip" && \
     unzip -oj "$HOME/install/jbmono.zip" "fonts/ttf/*.ttf" -d "$HOME/.local/share/fonts/" && \
     fc-cache -vf "$HOME/.local/share/fonts/"
diff --git a/install/kde-backports b/install/kde-backports
index a5401a4..57687e1 100755
--- a/install/kde-backports
+++ b/install/kde-backports
@@ -1,14 +1,9 @@
 #!/bin/bash
 ##makedesc: Install KDE Backports
+source `dirname $0`/../helpers || exit 255
 
-echo
-echo "==============================================="
-echo "Installing KDE Backports..."
-echo "==============================================="
-echo
+title
 
-sudo add-apt-repository -y ppa:kubuntu-ppa/backports
-# sudo add-apt-repository -y ppa:kubuntu-ppa/backports-extra
-sudo apt update
-# sudo pkcon update
-sudo apt full-upgrade
+sudo add-apt-repository -y ppa:kubuntu-ppa/backports && \
+    sudo apt update && \
+    sudo apt full-upgrade
diff --git a/install/openvpn b/install/openvpn
index 8f51da2..f52a536 100755
--- a/install/openvpn
+++ b/install/openvpn
@@ -1,37 +1,31 @@
 #!/bin/bash
-##makedesc: Install openvpn v2.5.8 (src)
+##makedesc: Install openvpn v2.6.3 (src)
+source `dirname $0`/../helpers || exit 255
 
 # https://openvpn.net/community-downloads/
 # https://openvpn.net/community-resources/installing-openvpn/
 
-[ $1 ] && OVPNVER="$1" || OVPNVER='2.5.8'
+[ "$1" ] && OVPNVER="$1" || OVPNVER='2.6.3'
 
-echo
-echo "==============================================="
-echo "Installing openvpn v${OVPNVER} (src)..."
-echo "==============================================="
-echo
+title "Installing openvpn v${OVPNVER} (src)..."
 
-set -ex
-
-sudo apt install -y \
-    libssl-dev \
+require libssl-dev \
     liblzo2-dev \
     libpam0g-dev
 
 mkdir -p "$HOME/install/"
-wget "https://swupdate.openvpn.org/community/releases/openvpn-${OVPNVER}.tar.gz" \
-    -O "/tmp/openvpn-${OVPNVER}.tar.gz"
-tar -xzf "/tmp/openvpn-${OVPNVER}.tar.gz" -C "$HOME/install/"
-cd "$HOME/install/openvpn-${OVPNVER}"
-sudo ./configure && \
+download "https://swupdate.openvpn.org/community/releases/openvpn-${OVPNVER}.tar.gz" "$HOME/install/openvpn-${OVPNVER}.tar.gz" && \
+    unpak_targz "$HOME/install/openvpn-${OVPNVER}.tar.gz" "$HOME/install/" && \
+    cd "$HOME/install/openvpn-${OVPNVER}" && \
+    sudo ./configure && \
     sudo make && \
     sudo make install &&
-    sudo apt install -y \
-        network-manager-openvpn \
+    apt_install network-manager-openvpn \
         network-manager-openvpn-gnome
 
-echo
-echo "Finish!"
-openvpn --version
-echo
+[ $? = 0 ] && {
+    echo
+    success "openvpn installed!"
+    openvpn --version
+    echo
+}
diff --git a/install/papirus b/install/papirus
index e631bc7..1e576cb 100755
--- a/install/papirus
+++ b/install/papirus
@@ -1,34 +1,27 @@
 #!/bin/bash
 ##makedesc: Install papirus-icon-theme (latest)
+source `dirname $0`/../helpers || exit 255
 
-echo
-echo "==============================================="
-echo "Installing papirus-icon-theme (latest)..."
-echo "==============================================="
-echo
+title
 
-installed() {
-    command -v "$1" >/dev/null 2>&1
-}
+mkdir -p "$HOME/install/papirus-icon-theme" "$HOME/.local/share/icons/"
 
 if installed git; then
-    mkdir -p "$HOME/install/"
-    git clone https://github.com/PapirusDevelopmentTeam/papirus-icon-theme.git "$HOME/install/papirus-icon-theme" --depth=1 --single-branch
+    clone_quick https://github.com/PapirusDevelopmentTeam/papirus-icon-theme.git "$HOME/install/"
 else
-    ! installed wget && sudo apt install -y wget
-    mkdir -p "$HOME/install/papirus-icon-theme"
-    wget https://github.com/PapirusDevelopmentTeam/papirus-icon-theme/archive/refs/heads/master.zip -O "$HOME/install/papirus-icon-theme.zip"
-    unzip -oq "$HOME/install/papirus-icon-theme.zip" -d "$HOME/install/papirus-icon-theme"
-    rm -f "$HOME/install/papirus-icon-theme.zip"
+    download https://github.com/PapirusDevelopmentTeam/papirus-icon-theme/archive/refs/heads/master.zip -O "$HOME/install/papirus-icon-theme.zip" && \
+        unzip -oq "$HOME/install/papirus-icon-theme.zip" -d "$HOME/install/papirus-icon-theme" && \
+        rm -f "$HOME/install/papirus-icon-theme.zip"
 fi
 
-mkdir -p "$HOME/.local/share/icons/"
-ln -sf "$HOME/install/papirus-icon-theme/Papirus" "$HOME/.local/share/icons/Papirus"
-ln -sf "$HOME/install/papirus-icon-theme/Papirus-Dark" "$HOME/.local/share/icons/Papirus-Dark"
-ln -sf "$HOME/install/papirus-icon-theme/Papirus-Light" "$HOME/.local/share/icons/Papirus-Light"
+symlink "$HOME/install/papirus-icon-theme/Papirus" "$HOME/.local/share/icons/Papirus" && \
+    symlink "$HOME/install/papirus-icon-theme/Papirus-Dark" "$HOME/.local/share/icons/Papirus-Dark" && \
+    symlink "$HOME/install/papirus-icon-theme/Papirus-Light" "$HOME/.local/share/icons/Papirus-Light"
+
+[ $? = 0 ] && {
+    echo
+    success "Papirus icons installed!"
+    info "You can find them in $HOME/.local/share/icons/"
+    echo
+}
 
-echo
-echo "Finish! Don't forget to change current icon theme."
-echo "You can find them here:"
-echo -e "\t$HOME/.local/share/icons/"
-echo
diff --git a/install/pgsql b/install/pgsql
index 5386919..81de742 100755
--- a/install/pgsql
+++ b/install/pgsql
@@ -1,16 +1,14 @@
 #!/bin/bash
 ##makedesc: Install postgresql (latest) and php-pgsql (if php is installed)
+source `dirname $0`/../helpers || exit 255
 
-echo
-echo "==============================================="
-echo "Installing postgresql (latest)..."
-echo "==============================================="
-echo
+title
 
-installed() {
-    command -v "$1" >/dev/null 2>&1
-}
-
-sudo apt install -y --autoremove postgresql postgresql-contrib
-sudo service postgresql restart
-installed 'php' && sudo apt install -y --autoremove php-pgsql
+require postgresql postgresql-contrib && \
+    sudo service postgresql restart && \
+    {
+        echo
+        success "openvpn installed!"
+        postgres --version
+        echo
+    }
diff --git a/install/postman b/install/postman
index 5b1b67f..e77f17f 100755
--- a/install/postman
+++ b/install/postman
@@ -1,28 +1,31 @@
 #!/bin/bash
 ##makedesc: Install postman (latest)
+source `dirname $0`/../helpers || exit 255
 
-echo
-echo "==============================================="
-echo "Installing postman (latest)..."
-echo "==============================================="
-echo
+# https://learning.postman.com/docs/getting-started/installation-and-updates/#installing-postman-on-linux
 
-mkdir -p $HOME/install/postman
-mkdir -p $HOME/.local/bin
-wget "https://dl.pstmn.io/download/latest/linux64" -O $HOME/install/postman.tar.gz && \
-    tar -xzf $HOME/install/postman.tar.gz -C $HOME/install/postman && \
-    ln -sf $HOME/install/postman/Postman/Postman $HOME/.local/bin/postman && \
-    mkdir -p "$HOME/.local/share/applications" && \
-    cat << EOF > "$HOME/.local/share/applications/Postman.desktop"
-#!/usr/bin/env xdg-open
+title
 
+mkdir -p "$HOME/install" && \
+    "$HOME/.local/bin" && \
+    "$HOME/.local/share/applications"
+
+download "https://dl.pstmn.io/download/latest/linux64" $HOME/install/postman.tar.gz && \
+    unpak_targz "$HOME/install/postman.tar.gz" "$HOME/install" && \
+    symlink $HOME/install/Postman/Postman $HOME/.local/bin/postman && \
+    cat << EOF > "$HOME/.local/share/applications/Postman.desktop" && sudo update-desktop-database
 [Desktop Entry]
 Name=Postman
-Exec=$HOME/.local/bin/postman
-Icon=$HOME/install/postman/Postman/app/icons/icon_128x128.png
-Categories=Utility,Network
+Exec=$HOME/.local/bin/postman %U
+Icon=$HOME/install/Postman/app/icons/icon_128x128.png
+Categories=Development,Network
 Terminal=false
 Type=Application
 Encoding=UTF-8
 EOF
-sudo update-desktop-database
+
+[ $? = 0 ] && {
+    echo
+    success "Postman installed!"
+    echo
+}