amcginlay

#!/bin/bash
# https://docs.aws.amazon.com/systems-manager/latest/userguide/sysman-manual-agent-install.html
sudo yum install -y https://s3.amazonaws.com/ec2-downloads-windows/SSMAgent/latest/linux_amd64/amazon-ssm-agent.rpm

# this to check
sudo systemctl status amazon-ssm-agent

amcginlay

# inspired by https://jameshfisher.com/2018/12/31/how-to-make-a-webserver-with-netcat-nc/
#!/bin/bash
yum install -y socat
socat TCP4-LISTEN:${PORT:-80},fork SYSTEM:' \
  read -r line \
  read -r _ workload _ <<< "$line" \
  workload=${workload:1}
  [ ! -z "$workload" ] && timeout $workload yes > /dev/null \
  echo HTTP/1.0 200 \
  echo Content-Type\: text/plain \

amcginlay

#!/bin/bash
yum install -y socat
socat TCP4-LISTEN:80,fork SYSTEM:' \
  echo HTTP/1.0 200 \
  echo \
  echo Response from $(hostname) at $(date '+%s.%N')'

amcginlay

#!/bin/bash
yum update -y
yum install -y nfs-utils
FILE_SYSTEM_ID=fs-xxxxxxxx
AVAILABILITY_ZONE=$(curl -s http://169.254.169.254/latest/meta-data/placement/availability-zone )
REGION=${AVAILABILITY_ZONE:0:-1}
MOUNT_POINT=/mnt/efs
mkdir -p ${MOUNT_POINT}
chown ec2-user:ec2-user ${MOUNT_POINT}
echo ${FILE_SYSTEM_ID}.efs.${REGION}.amazonaws.com:/ ${MOUNT_POINT} nfs4 nfsvers=4.1,rsize=1048576,wsize=1048576,hard,timeo=600,retrans=2,_netdev 0 0 >> /etc/fstab

amcginlay

#!/bin/bash
sudo yum update -y
sudo yum install -y ruby wget
wget https://aws-codedeploy-us-east-1.s3.us-east-1.amazonaws.com/latest/install
chmod +x ./install
sudo ./install auto
sudo service codedeploy-agent status

amcginlay

#!/bin/bash
for region in $(aws ec2 describe-regions --query "Regions[*].[RegionName]" --output text); do
  echo "--- ${region} ---"
  aws ec2 describe-vpcs --region ${region} --query "Vpcs[].[VpcId,Tags[?Key=='Name'].Value | [0]]" --output text | while read vpcdata; do
    set $vpcdata; vpcid=${1}; vpcname=${2}
    aws ec2 describe-security-groups --region ${region} --filters "Name=vpc-id,Values=${vpcid}" --query "SecurityGroups[].[GroupId,GroupName]" --output text | while read sgdata; do
      set $sgdata; sgid=${1}; sgname=${2}
      if [ "${sgname}" != "default" ]; then
        usagecount=$(aws ec2 describe-network-interfaces --region ${region} --filters "Name=group-id,Values=${sgid}" --query "NetworkInterfaces[] | length(@)" --output text)
        if [ "${usagecount}" == "0" ]; then

amcginlay

#!/bin/bash
aws iam list-policies --scope Local --query "Policies[?AttachmentCount == \`0\`].[PolicyName]" --output text

amcginlay

#!/bin/bash
aws iam get-account-authorization-details --query "RoleDetailList[].[RoleLastUsed.LastUsedDate, RoleName]" --output text | sed -e 's/^None/1970-01-01T00:00:00+00:00/g' | sort | while read roledata; do
  set $roledata; rolelastused=${1:0:10}; rolename=${2}
  daysago=$((($(date +%s)-$(date -j -f "%Y-%m-%d" ${rolelastused} +%s))/86400))
  echo "${rolename} (used ${daysago} days ago)"
done

amcginlay

#!/bin/bash
mkdir myubuntu && cd $_
echo "FROM ubuntu:latest" > Dockerfile
docker build -t myubuntu . # notice IMAGE ID will be identical to ubuntu:latest as no extra layers added
docker container run -it myubuntu /bin/bash

amcginlay

curl -L https://github.com/etcd-io/etcd/releases/download/v3.4.13/etcd-v3.4.13-linux-amd64.tar.gz -o etcd-v3.4.13-linux-amd64.tar.gz
tar xavf etcd-v3.4.13-linux-amd64.tar.gz
cd etcd-v3.4.13-linux-amd64
./etcd

./etcdctl # to view help
./etcdctl put key1 value1
./etcdctl get key1