diff --git a/src/main/kotlin/org/domaindrivenarchitecture/provs/server/application/Application.kt b/src/main/kotlin/org/domaindrivenarchitecture/provs/server/application/Application.kt
index a44de64..467307e 100644
--- a/src/main/kotlin/org/domaindrivenarchitecture/provs/server/application/Application.kt
+++ b/src/main/kotlin/org/domaindrivenarchitecture/provs/server/application/Application.kt
@@ -1,9 +1,11 @@
 package org.domaindrivenarchitecture.provs.server.application
 
 import org.domaindrivenarchitecture.provs.framework.core.cli.createProvInstance
+import org.domaindrivenarchitecture.provs.server.domain.ServerCliCommand
 import org.domaindrivenarchitecture.provs.server.domain.ServerType
 import org.domaindrivenarchitecture.provs.server.domain.k3s.K3sCliCommand
 import org.domaindrivenarchitecture.provs.server.domain.k3s.provisionK3s
+import org.domaindrivenarchitecture.provs.server.infrastructure.genericFileExistenceCheck
 import kotlin.system.exitProcess
 
 
@@ -18,13 +20,26 @@ fun main(args: Array<String>) {
     val checkedArgs = if (args.isEmpty()) arrayOf("-h") else args
 
     val cmd = CliArgumentsParser("provs-server.jar subcommand target").parseCommand(checkedArgs)
-    if (!cmd.isValid()) {
-        println("Arguments are not valid, pls try -h for help.")
+
+    // input validation
+    if (!cmd.isValidTarget()) {
+        println("Remote or localhost not valid, please try -h for help.")
+        exitProcess(1)
+    }
+    if (!cmd.isValidConfigFileName()) {
+        println("Config file not found. Please check if path is correct.")
         exitProcess(1)
     }
+    if (!(cmd as K3sCliCommand).isValidApplicationFileName()) {
+        println("Application file not found. Please check if path is correct.")
+        exitProcess(1)
+    }
+
     val prov = createProvInstance(cmd.target)
-    when(cmd.serverType) {
-        ServerType.K3S -> prov.provisionK3s(cmd as K3sCliCommand)
-        else -> { throw RuntimeException("Unknown serverType") }
+
+    if (!cmd.isValidServerType()) {
+        throw RuntimeException("Unknown serverType. Currently only k3s is accepted.")
+    } else {
+        prov.provisionK3s(cmd as K3sCliCommand)
     }
 }
diff --git a/src/main/kotlin/org/domaindrivenarchitecture/provs/server/domain/ServerCliCommand.kt b/src/main/kotlin/org/domaindrivenarchitecture/provs/server/domain/ServerCliCommand.kt
index a02ea3f..c619725 100644
--- a/src/main/kotlin/org/domaindrivenarchitecture/provs/server/domain/ServerCliCommand.kt
+++ b/src/main/kotlin/org/domaindrivenarchitecture/provs/server/domain/ServerCliCommand.kt
@@ -2,6 +2,7 @@ package org.domaindrivenarchitecture.provs.server.domain
 
 import org.domaindrivenarchitecture.provs.configuration.domain.ConfigFileName
 import org.domaindrivenarchitecture.provs.configuration.domain.TargetCliCommand
+import org.domaindrivenarchitecture.provs.server.infrastructure.genericFileExistenceCheck
 
 enum class ServerType {
     K3D, K3S
@@ -12,7 +13,16 @@ open class ServerCliCommand(
     val target: TargetCliCommand,
     val configFileName: ConfigFileName?,)
 {
-    fun isValid(): Boolean {
+    fun isValidServerType(): Boolean {
+        return serverType == ServerType.K3S
+    }
+    fun isValidTarget(): Boolean {
         return target.isValid()
     }
+    fun isValidConfigFileName(): Boolean {
+        if (configFileName == null) {
+            return true
+        }
+        return genericFileExistenceCheck(configFileName.fileName)
+    }
 }
diff --git a/src/main/kotlin/org/domaindrivenarchitecture/provs/server/domain/k3s/K3sCliCommand.kt b/src/main/kotlin/org/domaindrivenarchitecture/provs/server/domain/k3s/K3sCliCommand.kt
index 1cca7f6..d4526b9 100644
--- a/src/main/kotlin/org/domaindrivenarchitecture/provs/server/domain/k3s/K3sCliCommand.kt
+++ b/src/main/kotlin/org/domaindrivenarchitecture/provs/server/domain/k3s/K3sCliCommand.kt
@@ -4,6 +4,7 @@ import org.domaindrivenarchitecture.provs.configuration.domain.ConfigFileName
 import org.domaindrivenarchitecture.provs.configuration.domain.TargetCliCommand
 import org.domaindrivenarchitecture.provs.server.domain.ServerCliCommand
 import org.domaindrivenarchitecture.provs.server.domain.ServerType
+import org.domaindrivenarchitecture.provs.server.infrastructure.genericFileExistenceCheck
 
 class K3sCliCommand(
     serverType: ServerType,
@@ -12,7 +13,15 @@ class K3sCliCommand(
     val applicationFileName: ApplicationFileName?,
     val submodules: List<String>? = null,
     val reprovision: Reprovision = false
-) :
-    ServerCliCommand(
-        serverType, target, configFileName
-    )
\ No newline at end of file
+) : ServerCliCommand(
+    serverType,
+    target,
+    configFileName
+) {
+    fun isValidApplicationFileName(): Boolean {
+        if (applicationFileName == null) {
+            return true
+        }
+        return genericFileExistenceCheck(applicationFileName.fileName)
+    }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/org/domaindrivenarchitecture/provs/server/infrastructure/CliConvenience.kt b/src/main/kotlin/org/domaindrivenarchitecture/provs/server/infrastructure/CliConvenience.kt
index 060f893..25206f7 100644
--- a/src/main/kotlin/org/domaindrivenarchitecture/provs/server/infrastructure/CliConvenience.kt
+++ b/src/main/kotlin/org/domaindrivenarchitecture/provs/server/infrastructure/CliConvenience.kt
@@ -8,7 +8,6 @@ fun Prov.provisionServerCliConvenience() = task {
 }
 
 fun Prov.provisionKubectlCompletionAndAlias(): ProvResult = task {
-
     cmd("kubectl completion bash | sudo tee /etc/bash_completion.d/kubectl > /dev/null")
     cmd("echo 'alias k=kubectl' >>~/.bashrc")
     cmd("echo 'complete -o default -F __start_kubectl k' >>~/.bashrc")
diff --git a/src/main/kotlin/org/domaindrivenarchitecture/provs/server/infrastructure/localFiles.kt b/src/main/kotlin/org/domaindrivenarchitecture/provs/server/infrastructure/localFiles.kt
new file mode 100644
index 0000000..35c37e4
--- /dev/null
+++ b/src/main/kotlin/org/domaindrivenarchitecture/provs/server/infrastructure/localFiles.kt
@@ -0,0 +1,12 @@
+package org.domaindrivenarchitecture.provs.server.infrastructure
+
+import java.io.File
+
+fun genericFileExistenceCheck(fileName: String): Boolean {
+    if (fileName.isEmpty()) {
+        return false
+    } else if ((!File(fileName).exists())) {
+        return false
+    }
+    return true
+}
diff --git a/src/test/kotlin/org/domaindrivenarchitecture/provs/server/application/CliArgumentParserTest.kt b/src/test/kotlin/org/domaindrivenarchitecture/provs/server/application/CliArgumentParserTest.kt
index a6cac4f..017b182 100644
--- a/src/test/kotlin/org/domaindrivenarchitecture/provs/server/application/CliArgumentParserTest.kt
+++ b/src/test/kotlin/org/domaindrivenarchitecture/provs/server/application/CliArgumentParserTest.kt
@@ -19,8 +19,9 @@ internal class CliArgumentParserTest {
         val result = parser.parseCommand(args = arrayOf("k3s", "local", "-c", "config.yaml"))
 
         // then
-        assertTrue(result.isValid())
-        assertEquals(ServerType.K3S, result.serverType)
+        assertTrue(result.isValidServerType())
+        assertTrue(result.isValidTarget())
+        assertTrue(result.isValidConfigFileName())
     }
 
     @Test
@@ -32,8 +33,9 @@ internal class CliArgumentParserTest {
         val result: K3sCliCommand = parser.parseCommand(args = arrayOf("k3s", "local", "-o", "grafana")) as K3sCliCommand
 
         // then
-        assertTrue(result.isValid())
-        assertEquals(ServerType.K3S, result.serverType)
+        assertTrue(result.isValidServerType())
+        assertTrue(result.isValidTarget())
+        assertTrue(result.isValidConfigFileName())
         assertEquals(listOf("grafana"), result.submodules)
         assertEquals(TargetCliCommand("local"), result.target)
     }
@@ -47,8 +49,8 @@ internal class CliArgumentParserTest {
         val result: K3sCliCommand = parser.parseCommand(args = arrayOf("k3s", "user@host.com", "-a", "app.yaml")) as K3sCliCommand
 
         // then
-        assertTrue(result.isValid())
-        assertEquals(ServerType.K3S, result.serverType)
+        assertTrue(result.isValidTarget())
+        assertTrue(result.isValidServerType())
         assertEquals(ApplicationFileName("app.yaml"), result.applicationFileName)
         assertEquals(TargetCliCommand("user@host.com"), result.target)
     }