Chia Harvester start script for Ubuntu

Posted on May 24, 2021 by admin

This is a basic script for starting the Chia Harvester on Ubuntu. You can download the script here or use the following commands to download with wget.

wget https://incredigeek.com/home/downloads/ChiaScripts/StartHarvester.sh
chmod +x StartHarvester.sh
./StartHarvester.sh

Here is the script contents.

#!/bin/bash

# Script for starting the Chia Harvester

cd ~/chia-blockchain/
. ./activate
chia start harvester

sleep 5

if ( echo $(ps aux | grep -v grep | grep chia_harvester) | grep chia_harvester); then 
    echo "Harvester started"
else
    echo "Looks like the harvester is not running, try manually checking and/or running the commands to figure out what is wrong."
fi

UBNTMOD check range of IP addresses and see if they resolve DNS

Posted on December 28, 2019 by admin

The following uses the ubntmod.sh script to check a device then report if it is resolving DNS or not. ip=”192.168.1.” specifies the first part of the ip, the “for ((i=1; i<=254;i++))” tells it to go from 192.168.1.1 – 192.168.1.254, change the beginning and ending number if you want to change the ip range.

ip="192.168.1." && for ((i=10; i<=30;i++)); do if ( fping ${ip}$i -r1 | grep alive); then ./ubntmod.sh -i ${ip}${i} -e ; else echo ${ip}$i not alive; fi ; done

Broken out for easier reading.

ip="192.168.1." 
for ((i=10; i<=30;i++))
do 
if ( fping ${ip}$i -r1 | grep alive); then 
./ubntmod.sh -i ${ip}${i} -e 
else echo ${ip}$i not alive
fi 
done

If the script is able to log into the device and resolve DNS you should get

192.168.1.1 Resolves DNS

Bash script to monitor system service

Posted on February 27, 2019 by admin

This bash script runs and checks to see if a service like httpd, or mysql is running and alerts if it is not.

Script Usage

servicemonitor.sh httpd mariadb

Where httpd and mariadb are the services you want to monitor/check.

Setup Script

Create servicemonitor.sh file and paste the following contents in.

#!/bin/bash

timeHour=`date +%H` # date/time just shows the hour
quietHour="02"    # If it is this hour, then exit program, useful if services are expected to go down during a particular time for maintenance
if ( echo ${timeHour} | grep ${quietHour}); then
         echo "Is during quiet time.  Quiting."
         exit
fi

 function ALERT {
 msg="~/teams.sh -b"  # Sends a message to Microsoft Teams channel.  Needs the teams.sh script in the users home directory.
 ${msg} "$1"
 }
 function SERVICECHECK {
 serviceName="${1}"
 if (systemctl status ${serviceName} | grep Active | grep inactive); then
         ALERT "ERROR: $(hostname) - ${serviceName} - ${0} is inactive"
         echo "ERROR: ${serviceName} is inactive!"
 else
         echo "Running!"
 fi
 }
 for i in $@
 do
 echo Checking ${i}
 SERVICECHECK ${i}
 done

Note the teams.sh script that is called is another script that is called that sends an alert to Microsoft Teams. Is not needed for this script to run, but allows for remote alerting.

Save file and make it executable

chmod +x servicemonitor.sh

Add script to crontab (Optional)

crontab -e

The following runs the script every 5 minutes. Can change the 5 to 1 to run every minute. Change httpd and mariadb to the service you want to monitor.

*/5 * * * * /home/UserName/servicemonitor.sh httpd mariadb

BASH Script to add new SFTP user and setup permissions

Posted on December 18, 2018 by admin

This script adds a new SFTP user with only sftp access. Refer to this post on setting up a SFTP server.

Download script

wget www.incredigeek.com/home/downloads/scripts/sftpUserAdd.sh

Make executable

chmod +x sftpUserAdd.sh

Run with the new user you want to create.

./sftpUserAdd.sh sftpUsername

You may need to edit the script and modify the location parameters.

#!/bin/bash
# Automatically setup and add SFTP user
# Script creates new user and setups permissions
newUser=$1
sftpDir="/sftp/"
if grep -q ${newUser} /etc/passwd ;then
        echo ${newUser} Already exsists.  Aborting!
        exit 1
else
        mkdir -p ${sftpDir}/${newUser}/files
        useradd -g sftpusers -d ${sftpDir}/${newUser}/files -s /sbin/nologin ${newUser}
        passwd ${newUser}
        chown ${newUser}:sftpusers /sftp/CareMark/files
fi

LibreNMS bulk delete

Posted on November 22, 2018 by admin

There is a php script in /opt/librenms/ that lets you delete a host from the command line.

sudo /opt/librenms/delhost.php 192.168.1.20

Replace 192.168.1.20 with the hostname/ip address of the host you want to delete.

Delete Multiple Hosts

First you’ll need to get a list of devices you want to remove. You can do this by viewing the devices in the LibreNMS MySQL database;

Example:

$ mysql -u librenms -p librenms
MariaDB [librenms]> select hostname from devices;
+----------------------------------------+
| hostname |
+----------------------------------------+
| 192.168.88.1 |
| 192.168.1.20 |
| 192.168.1.12 |
| 192.168.88.5 |
4 rows in set (0.00 sec)
MariaDB [librenms]> exit

Put all the IP addresses you want to remove into a file and run the following for loop. Replace “remove_ip.lst” with the name of your ip list file.

for i in `cat ~/remove_ip.lst`; do sudo /opt/librenms/delhost.php $i; done

Upload ssh key to multiple servers automatically

Posted on July 9, 2015 by admin

Here is a quick script I created to automate copying a ssh key to multiple remote servers.

Basic command – the command uses sshpass to upload the ssh key to a remote server, this allows you to execute the command and not have to enter in a password to authenticate.

sshpass -p password ssh-copy-id -o StrictHostKeyChecking=no admin@remotehost

Script

#!/bin/bash

remotehosts="$1"
username="admin"
password="MyCoolPassword123"

for host in `cat ${remotehosts}`
do
sshpass -p${password} ssh-copy-id -o StrictHostKeyChecking=no ${username}@${host}
echo "Uploaded key to " ${host}
done

echo "Finished!"

Using the script

Download here.
Make it executable
```
chmod +x sshcopy.sh
```
Edit the script and change the username and password.
Create a file that contains each host’s IP address or hostname.
Run script (change hostlist.txt to your host list you created in step 3.)
```
./sshcopy.sh hostlist.txt
```
Wait for the script to finish.