dwallraff

tcpdump -nn -v -i eth0 -s 1500 -c 1 'ether[20:2] == 0x2000' 

#CDP packets offer some additional insight to the network you're on:
#The information contained in CDP announcements varies by the type of device and the version of the operating system running on it. Information contained includes the operating system version, hostname, every address for every protocol configured on the port where CDP frame is sent eg. IP address, the port identifier from which the announcement was sent, device type and model, duplex setting, VTP domain, native VLAN, power draw (for Power over Ethernet devices), and other device specific information.
#You tcpdump output might look something like (IP address XX'd out):
#14:42:57.087609 CDPv2, ttl: 180s, checksum: 692 (unverified), length 358
#      Device-ID (0x01), length: 11 bytes: 'Public_DMZ'
#      Address (0x02), length: 13 bytes: IPv4 (1) XXX.XXX.XX.X
#      Port-ID (0x03), length: 16 bytes: 'FastEthernet0/21'
#      Capability (0x04), length: 4 bytes: (0x00000028): L2 Switc

dwallraff

psql -h localhost -p 2544 -U admin ccdb

SELECT id,name FROM service_instances;
DELETE FROM service_instances WHERE id=X;

If that fails:
SELECT * FROM service_instance_operations WHERE service_instance_id=X;
DELETE FROM service_instance_operations WHERE service_instance_id=X;
DELETE FROM service_instances WHERE id=X;

dwallraff

sed -n -e '/BEGIN CERTIFICATE/,/END CERTIFICATE/ p' <file> | sed -e 's/^ *//g' | sed -e 's/-----END CERTIFICATE-----/-----END CERTIFICATE-----,./' | tr , '\n' | while read -d $'.' var; do echo "$var" | openssl x509 -text -noout; done | grep "Subject:"

dwallraff

#!/bin/bash

WEB=$(curl -v --silent https://bosh.io/d/stemcells/bosh-azure-hyperv-centos-7-go_agent 2>&1 | grep Location | awk '{print $3}' | cut -d '/' -f 5 | cut -d '-' -f 3)
CUR=$(bosh stemcells 2> /dev/null | grep bosh | awk '{print $6}' | tr -d '*')

if (( $WEB > $CUR )); then
	echo "Update stemcell"
else
	echo "Stemcell is fine"
fi

dwallraff

[ req ]
distinguished_name     = req_distinguished_name
req_extensions         = server_req_extensions
prompt                 = no

[ req_distinguished_name ]
C                      = <Your country>  # Only 2 characters
ST                     = <Your state>    # Only 2 characters
L                      = <Your city>
O                      = <Your org>

dwallraff

##### Commands to generate SSL certs/artifcts

# Download the temp.cnf file using the wget command below
# Edit temp.cnf and add your information
# Run the uncommented out commands to generate a self-signed cert (cert.pem) and private key (keyfile.pem)
wget https://gist.githubusercontent.com/dwallraff/c1ed31291ac7cf19304b/raw/e06feacbb85ac63659e6c1c40c70d5481522b390/temp.cnf

# Generate a new keyfile. A 2048 bit key size is TOTALLY fine. Jack it up to 4096 and wait if you must...
openssl genrsa -out keyfile.key 2048

dwallraff

apt-get install apache2-utils

# ab -n <num_requests> -c <concurrency> <addr>:<port><path>

ab -n 1000 -c 100 http://localhost:4567/

dwallraff

azure vm list-usage <region>

dwallraff

http://boshartifacts.cloudfoundry.org/file_collections?type=stemcells

dwallraff

http://boshartifacts.cloudfoundry.org/file_collections?type=releases