wjwnz: 2020

December 17, 2020

unifi.init[16271]: Invalid Java Home specified

apt-get install openjdk-8-jre

dpkg -i unifi_sysvinit_all.deb

apt-get install -f

October 19, 2020

ISC DHCP Server Failover

Documenting this as it was driving me insane, couldnt find any help online

Ubuntu 18.04 and 20.04

Errors in syslog

Oct 19 07:24:32 control dhcpd[13024]: DHCPDISCOVER from 40:a3:6b:c1:25:20 via ens160: not responding (recovering)

Oct 19 07:24:32 control dhcpd[13024]: DHCPDISCOVER from 60:01:94:e4:0b:a6 via ens160: not responding (recovering)

Oct 19 07:24:32 control dhcpd[13024]: DHCPREQUEST for 192.168.1.132 from d8:31:34:f2:e3:ad via ens160: not responding (recovering)

All I needed to do was the let ISC-DHCP-Server use the default ports:

failover peer "failover-partner" {
   primary;
   address 192.168.1.62;
  # port 519;

   peer address 192.168.1.172;
   # peer port 520;
   mclt 3600; # Primary only
   split 128; # Primary Only
   max-response-delay 60;
   max-unacked-updates 10;

load balance max seconds 3;
}

June 11, 2020

printenv BOOT <<< Check the current configuration
setenv BOOT <part1 part2=""> <<< Change to another partition
saveenv <<< Save configuration
boot <<< Reload the AP</part1>

setenv bootcmd nandboot <<< Set to nandboot
saveenv <<< Save configuration
boot <<< Reload the AP

setenv bootcmd nandboot  <<< Set to nandboot
saveenv  <<< Save configuration
boot  <<< Reload the AP

printenv BOOT  <<< Check the current configuration
setenv BOOT <part1 part2="">  <<< Change to another partition
saveenv  <<< Save configuration
boot  <<< Reload the AP</part1>

March 01, 2020

Automated Renewal of LetsEncrypt Cert on Cisco IOS with Route53

Installed the AWS CLI

apt-get install python3-pip

Ubunutu 16.x needs this as there is a bug in the package above

pip3 install awscli --upgrade

I used this script as the base for the AWS Route 53 Zone update and Certificate request

https://github.com/jed/certbot-route53

Create a public key for the "automation" user:

root@control:/usr/local/scripts# ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): /usr/local/scripts/cisco-automation.key
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /usr/local/scripts/cisco-automation.key.
Your public key has been saved in /usr/local/scripts/cisco-automation.key.pub.
The key fingerprint is:
The key's randomart image is:

Add the public key to the router:

ip ssh pubkey-chain
username automation
key-string
(paste in your pub key max 254 characters per line, so you will need to split it)
exit
exit
exit
exit
wr

copy the keys into the id_rsa and ird_rsa.pub file of the user that will run the script

cat cisco-automation.key > /root/.ssh/id_rsacat cisco-automation.key.pub > /root/.ssh/id_rsa.pub

emonCMS

Ubuntu 18.04 LTS

EmonScripts/readme.md at master · openenergymonitor/EmonScripts · GitHub

echo $USER' ALL=(ALL) NOPASSWD: ALL' | sudo tee /etc/sudoers.d/$USER && sudo chmod 0440 /etc/sudoers.d/$USER

wget https://raw.githubusercontent.com/openenergymonitor/EmonScripts/stable/install/init.sh
chmod +x init.sh && ./init.sh

settings.ini in /var/www/emoncms/.

cd /opt/openenergymonitor/EmonScripts/install/
nano config.ini

Standard Setup Filepaths

Install location for code from OpenEnergyMonitor GitHub repository such as EmonScripts /opt/openenergymonitor

Install location for modules symlinked to www /opt/emoncms

Main code location /var/www/emoncms

Log file location /var/log/emoncms

Data directory /var/opt/emoncms

wjwnz