Created Mobile category. Moved Android section into Mobile

Linux/README.md

@@ -4,4 +4,5 @@ This repository contains hands-on training content on how to attack a Linux box.
 
 1. [Getting Comfortable with Linux Basics](getting_comfortable_with_linux_basics/README.md)
    * [Bash Scripting](getting_comfortable_with_linux_basics/documentation/bash_scripting/README.md)
-   * [A Few Useful Commands](getting_comfortable_with_linux_basics/documentation/commands/README.md)
+   * [A Few Useful Commands](getting_comfortable_with_linux_basics/documentation/commands/README.md)
+   * [Redirection](getting_comfortable_with_linux_basics/documentation/redirection/README.md)

Linux/getting_comfortable_with_linux_basics/documentation/redirection/README.md

@@ -1,2 +1,40 @@
 # Redirection
 
+*"Everything is a file."*
+
+The shell references standard input, output and error file streams internally as file descriptors 0, 1, and 2, respectively.
+
+1. Redirect **standard error**: `ls -l /bin/usr 2> ls-error.txt`
+2. Redirect both **standard output and standard error**: `ls -l /bin/usr > ls-output.txt 2>&1`
+    1st, redirect standard output to a file, and then redirect file descriptor 2 (i.e., standard errror) to file descriptor 1 (i.e., standard output) using the notation **2>&1**.
+
+   Alternative, streamlined method to redirect both standard output and standard error to a file is: 
+
+        ls -l /bin/usr &> ls-output.txt
+        ls -l /bin/usr &>> ls-output.txt
+
+3. **Suppress error** messages from a command by redirecting error and status messages to a special file `/dev/null` (i.e., a *bit bucket*), which accepts input and does nothing with it: 
+
+        ls -l /bin/usr 2> /dev/null
+4. **Join** files: `cat file1 file2 ... fileN > combinedFile.out`
+5. **Create** short text files using `cat`
+
+        $ cat > file.txt
+        Type your text here...
+        Press Ctrl-d when done.
+
+6. **Pipe** the standard output of one command to standard input of another: `ls -l /bin /usr/bin | sort | uniq | wc -l`
+7. Use `uniq` with `-d` option to see the **list of duplicates**
+
+        ls -l /bin /usr/bin | sort | uniq -d | less
+
+8. Print **first N lines** of a file
+
+        head -n 5 ls-output.txt
+
+9. Print **last N lines** of a file
+
+        ls /usr/bin | tail -n 5
+
+10. Monitor a file in **real time**: `tail -f /var/log/messages`
+11. `tee` program reads standard input and copies it to both standard output and to one or more files

Mobile/README.md

@@ -0,0 +1,3 @@
+# Mobile Pentesting
+
+* [Android App](Android/README.md)

README.md

@@ -2,9 +2,11 @@
 
 This repository is intended to contain hands-on training content (and very little theory) for anyone and everyone who might be interested. 
 
-Keeping in mind the repeated demand for the same training content again and again, but for a newer audience, I am creating this repository. Anyone is free to enhance the existing content and/or use the training material provided here for self-learning or to deliver sessions in open communities. 
+Keeping in mind the repeated demand for the same training content again and again, but for a newer audience, this repository has been created. Anyone is free to enhance the existing content and/or use the materials provided here for self-learning or to deliver sessions in open communities.
+
+*Note:* I am not an expert, but just someone trying to learn from work done by countless other intellectuals.
 
 1. [Linux](Linux/README.md)
 2. [Windows](Windows/README.md)
 3. [Web](Web/README.md)
-4. [Android](Android/README.md)
+4. [Mobile](Mobile/README.md)

Web/README.md

@@ -1,6 +1,6 @@
-# Attacking a Website
+# Web Pentesting
 
 This repository contains hands-on training content on how to attack a Website.
 
-1. [Getting comfortable with Web basics](getting_comfortable_with_web_basics/README.md)
-2. *Content to be added*
+1. [Web Basics](web_basics/README.md)
+2. [AWS Basics](aws_basics/README.md)

Web/aws_basics/README.md

@@ -0,0 +1,189 @@
+# AWS
+
+* Create new IAM user
+* Configure AWS CLI
+
+    * $ **vim ~/.aws/credentials**
+
+            [default]
+            aws_access_key_id = <ACCESS_KEY>
+            aws_secret_access_key = <SECRET_KEY>
+
+    * $ **vim ~/.aws/config** 
+
+            [default]
+            region=ap-south-1
+            output=json
+
+    * $ **aws iam get-user**
+
+            {
+                "User": {
+                    "Arn": "arn:aws:iam::62NNNNNNNN21:user/username",
+                    "UserName": "username",
+                    "Path": "/",
+                    "UserId": "USERID",
+                    "CreateDate": "2020-10-05T11:06:55Z"
+                }
+            }
+
+* Test Terraform Setup 
+
+    * $ **vim terraform.tfvars**
+
+            AWS_ACCESS_KEY="<ACCESS_KEY>"
+            AWS_SECRET_KEY="<SECRET_KEY>"
+
+    * $ **vim terraform.code.tf**
+
+            # ************************
+            # vars.tf
+            # ************************
+
+            variable "AWS_ACCESS_KEY" {}
+            variable "AWS_SECRET_KEY" {}
+            variable "AWS_REGION" {
+            default = "ap-south-1"
+            }
+            variable "AMIS" {
+            type = "map"
+            default = {
+                ap-south-1 = "ami-03cfb5e1fb4fac428"
+            }
+            }
+            
+            # ************************
+            # provider.tf
+            # ************************
+            provider "aws" {
+                access_key = "${var.AWS_ACCESS_KEY}"
+                secret_key = "${var.AWS_SECRET_KEY}"
+                region = "${var.AWS_REGION}"
+            }
+            
+            # ************************
+            # instance.tf
+            # ************************
+            resource "aws_instance" "null_DEVOPS_INSTANCE" {
+            ami = "${lookup(var.AMIS, var.AWS_REGION)}"
+            tags = { Name = "UDEMY" }
+            instance_type = "t2.micro"
+            provisioner "local-exec" {
+                command = "echo ${aws_instance.null_DEVOPS_INSTANCE.private_ip} >> private_ips.txt"
+            }
+            }
+            output "ip" {
+                value = "${aws_instance.null_DEVOPS_INSTANCE.public_ip}"
+            }
+
+    * $ **terraform init**
+    * $ **terraform apply**
+    * $ **terraform destroy**
+
+* Create an S3 bucket: `kops.null.co.in`
+* Create a hosted zone: `kops.nullbangalore.site`
+* Find full zone name for your region: `aws ec2 describe-availability-zones --region ap-south-1   `
+
+* Setup a Kubernetes cluster using Terraform
+
+    * $ **vim kops_cluster.sh**
+
+            kops create cluster \
+            --name=kops.nullbangalore.site \
+            --state=s3://kops.null.co.in \
+            --authorization RBAC \
+            --zones=ap-south-1a \
+            --node-count=2 \
+            --node-size=t2.micro \
+            --master-size=t2.micro \
+            --master-count=1 \
+            --dns-zone=kops.nullbangalore.site \
+            --out=null_terraform \
+            --target=terraform \
+            --ssh-public-key=~/.ssh/null_terraform.pub
+
+  * Troubleshooting: *"Terraform has initialized, but configuration upgrades may be needed."* 
+
+        terraform 0.12upgrade
+        terraform init
+        terraform apply
+
+    **Outputs:**
+
+        cluster_name = kops.nullbangalore.site
+        master_autoscaling_group_ids = [
+        "master-ap-south-1a.masters.kops.nullbangalore.site",
+        ]
+        master_security_group_ids = [
+        "sg-0701055adb32e03c2",
+        ]
+        masters_role_arn = arn:aws:iam::625077889421:role/masters.kops.nullbangalore.site
+        masters_role_name = masters.kops.nullbangalore.site
+        node_autoscaling_group_ids = [
+        "nodes.kops.nullbangalore.site",
+        ]
+        node_security_group_ids = [
+        "sg-072f49ef57ae19941",
+        ]
+        node_subnet_ids = [
+        "subnet-07caa79d4303b009b",
+        ]
+        nodes_role_arn = arn:aws:iam::625077889421:role/nodes.kops.nullbangalore.site
+        nodes_role_name = nodes.kops.nullbangalore.site
+        region = ap-south-1
+        route_table_public_id = rtb-08dcf341209c578f9
+        subnet_ap-south-1a_id = subnet-07caa79d4303b009b
+        vpc_cidr_block = 172.20.0.0/16
+        vpc_id = vpc-0624da09a3c8a3ab1
+
+  * $ **kubectl get nodes**
+
+        NAME                                           STATUS   ROLES    AGE   VERSION
+        ip-172-20-41-144.ap-south-1.compute.internal   Ready    node     10m   v1.17.12
+        ip-172-20-43-234.ap-south-1.compute.internal   Ready    master   13m   v1.17.12
+        ip-172-20-63-134.ap-south-1.compute.internal   Ready    node     10m   v1.17.12
+
+* Deploy Nginx in Kubernetes cluster AWS
+
+        kubectl \
+            create deployment my-nginx-deployment \
+            --image=nginx
+
+    ---
+
+        kubectl \
+            expose deployment my-nginx-deployment \
+            --port=80 \
+            --type=NodePort \
+            --name=my-nginx-service
+
+    ---
+
+        $ kubectl get nodes
+        $ kubectl get pods,svc
+
+* Update `Inbound rules` for `Security group for nodes` to expose the Nginx port
+* Create a **configmap** object in Kubernetes, to store NGINX content
+
+        $ kubectl create configmap nginx-content --from-file=index.html
+        $ kubectl get cm nginx-content
+        $ kubectl describe cm
+        
+* Deploy `deployment` and `service` with `Nginx`
+
+        $ kubectl create -f deployment_file.yaml 
+        $ kubectl delete cm nginx-content
+        $ kubectl get pod
+        $ kubectl exec -it nginx-deployment-5db549b6df-4xplk -- bash
+        $ vim deployment_file.yaml 
+        $ kubectl apply -f deployment_file.yaml
+        $ kubectl delete pod nginx-deployment-5db549b6df-4xplk
+
+* Cleanup
+  * **kubectl delete all --all**
+  * kubectl get svc --all-namespaces
+  * kubectl get nodes
+  * kubectl delete node --all
+  * $ terraform state list
+  * $ terraform destroy
+