Extended names for variables

Extended names for variables:
from major to majorVersion;
from minor to minorVersion;

client/core/controllers/serverController.cpp

@@ -407,6 +407,18 @@ ErrorCode ServerController::installDockerWorker(const ServerCredentials &credent
                       cbReadStdOut, cbReadStdErr);
 
     qDebug().noquote() << "ServerController::installDockerWorker" << stdOut;
+    if (container == DockerContainer::Awg) {
+        QRegularExpression regex(R"(Linux\s+(\d+)\.(\d+)[^\d]*)");
+        QRegularExpressionMatch match = regex.match(stdOut);
+        if (match.hasMatch()) {
+            int majorVersion = match.captured(1).toInt();
+            int minorVersion = match.captured(2).toInt();
+
+            if (majorVersion < 4 || (majorVersion == 4 && minorVersion < 14)) {
+                return ErrorCode::ServerLinuxKernelTooOld;
+            }
+        }
+    }
     if (stdOut.contains("lock"))
         return ErrorCode::ServerPacketManagerError;
     if (stdOut.contains("command not found"))

client/core/defs.h

@@ -58,6 +58,7 @@ namespace amnezia
         ServerUserDirectoryNotAccessible = 208,
         ServerUserNotAllowedInSudoers = 209,
         ServerUserPasswordRequired = 210,
+        ServerLinuxKernelTooOld = 211,
 
         // Ssh connection errors
         SshRequestDeniedError = 300,

client/core/errorstrings.cpp

@@ -26,6 +26,7 @@ QString errorString(ErrorCode code) {
     case(ErrorCode::ServerUserDirectoryNotAccessible): errorMessage = QObject::tr("The server user's home directory is not accessible"); break;
     case(ErrorCode::ServerUserNotAllowedInSudoers): errorMessage = QObject::tr("Action not allowed in sudoers"); break;
     case(ErrorCode::ServerUserPasswordRequired): errorMessage = QObject::tr("The user's password is required"); break;
+    case(ErrorCode::ServerLinuxKernelTooOld): errorMessage = QObject::tr("Server error: Linux kernel is too old"); break;
 
     // Libssh errors
     case(ErrorCode::SshRequestDeniedError): errorMessage = QObject::tr("SSH request was denied"); break;

client/server_scripts/install_docker.sh

@@ -20,4 +20,5 @@ if [ "$(systemctl is-active docker)" != "active" ]; then \
   sleep 5; sudo systemctl start docker; sleep 5;\
 fi;\
 if ! command -v sudo > /dev/null 2>&1; then echo "Failed to install sudo, command not found"; exit 1; fi;\
-docker --version
+docker --version;\
+uname -sr