Add quick-installer for remote installations

quick-installer.sh

@@ -0,0 +1,59 @@
+#!/bin/sh
+
+install_sudo() {
+    echo ">>> Detecting package manager..." >&2
+    # Check if apt is installed for Debian based distributions
+    dpkg-query -l apt > /dev/null 2>&1
+    if [ $? = 0 ]; then
+        echo ">>> Apt found, updating repository database..." >&2
+        apt update -qq
+
+        echo ">>> Installing sudo package..." >&2
+        apt install sudo -qq
+        return 0
+    fi
+    
+    echo ">>> No supported package manager detected, exciting..." >&2
+    return 1
+}
+
+check_privilege() {
+    if ! [ $(id -u) = 0 ]; then
+        echo ">>> Please run as root" >&2
+        return 1
+    fi
+}
+
+check_sudo_installation() {
+    dpkg-query -l sudo > /dev/null 2>&1
+
+    if ! [ $? = 0 ]; then
+        echo ">>> Sudo package missing..." >&2
+        return $(install_sudo)
+    fi
+
+    return 0
+}
+
+create_default_user() {
+    echo ">>> Adding creator user..." >&2
+    useradd -m -G sudo creator
+    
+    echo ">>> Updating creator password..." >&2
+    sed -i 's/creator:\*:/creator:\$6\$saltsalt\$EamwjkVXAe1WqiTTXuzgsmljl5cpVewMLH3xl8TdvQ\/V4S9e30upeNz2bdLkG5\.H71TCEso5Nl0jpyZRx7xy6\/:/g' /etc/shadow
+}
+
+set_creator_ssh_keys() {
+    echo ">>> Setting creator ssh keys..." >&2
+    sudo -u creator mkdir -p -m 700 /home/creator/.ssh
+    sudo -u creator sh -c 'echo "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDYsz4jdyzf9UcJ8eEavVmi+DNYE3ioeJBfTlVMw7Vsb tanguy@Diogenes" > /home/creator/.ssh/authorized_keys'
+    chmod 600 /home/creator/.ssh/authorized_keys
+}
+
+check_privilege
+
+check_sudo_installation
+
+create_default_user
+
+set_creator_ssh_keys