simeji · September 16, 2015 17:50
diff --git a/file0.txt b/file0.txt
 $ ago=30;date -v-${ago}d > /dev/null 2>&1 && DATE=`date -v-${ago}d +%Y-%m-%d` || DATE=`date --date="-${ago} days" +%Y-%m-%d`; aws ec2 describe-instances --filter Name=instance-state-name,Values=stopped --query "Reservations[].Instances[?LaunchTime<='$DATE'][].{InstanceId: InstanceId,PrivateIpAddress: PrivateIpAddress,LaunchTime: LaunchTime}"
diff --git a/file1.txt b/file1.txt
 [
    {
        "InstanceId": "i-4xxxxxb5",
        "LaunchTime": "2015-08-02T16:31:32.000Z",
        "PrivateIpAddress": "172.31.0.200"
    },
    {
        "InstanceId": "i-dxxxxx2e",
        "LaunchTime": "2015-06-20T09:32:45.000Z",
        "PrivateIpAddress": "172.31.0.79"
    }
 ]
diff --git a/file2.txt b/file2.txt
 $ echo $DATE
 >> 2015-08-18
diff --git a/file3.txt b/file3.txt
 [
    {
        "InstanceId": "i-dxxxxx2e",
        "LaunchTime": "2015-06-20T09:32:45.000Z",
        "PrivateIpAddress": "172.30.0.79"
    }
 ]
diff --git a/file4.txt b/file4.txt
 $ echo $DATE
 2015-07-19