Nmap Scan subnet for PTR's When you need to scan an entire subnet for 'research purposes' and check for any associated PTR's we can use Nmap   nmap -R -sL 103.112.200.0/22 > results.txt

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I use this script on my CA server to create a certificate for each new server we provision. This allows our internal PKI to function. This script creates a certificate then copies it to the Ansible server where is can be deployed to the destination host Obviously you'll need to take the necessary precautions around key …

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Example 1 - Includes some static routes and manually specified IP's auto lo iface lo inet static address 103.90.59.9/32 auto ens3 iface ens3 inet static address 172.2.1.17 network 172.2.1.0 netmask 255.255.254.0 up route add -net 172.2.0.0 netmask 255.255.0.0 gw 172.2.1.1 up route add -net 172.2.0.0 netmask 255.255.0.0 …

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Script #!/bin/bash # Set the enviroment variable so read function knows to seperate on ",". export IFS="," NOW=$(date +"%Y_%m_%d_%H_%M") DATABASES_CONFIG_FILE="/home/bfnadmin/databases.csv" S3_ENDPOINT="https://my-s3-storage.com" S3_BUCKET="s3://sql-backups" TEMP_BACKUP_DIR="backups" while read HOST USERNAME PASSWORD …

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This script enables the requisite features on all RBD images in a pool to allow you to run rbd du and have it return a result quickly as opposed to having to calculate the size very time rbd ls -p backup1 | while read line; do echo "$line" rbd feature enable backup1/$line object-map exclusive-lock rbd object-map …

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Dont take my word for it on the WAL sizing - Check http://docs.ceph.com/docs/mimic/rados/configuration/bluestore-config-ref/ This script will create a spare 20G Logical volume to use as the WAL for a second spinner later if you need it export SSD=sdc export SPINNER=sda vgcreate ceph-ssd-0 /dev/$SSD vgcreate ceph-hdd-0 …

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Live migrations arent hard to do, but getting some real insights into them isnt super simple virsh qemu-monitor-command {VMNAME} --pretty '{"execute":"migrate_cancel"}' Allow Virsh more downtime(If it cant keepup with RAM utilization) virsh migrate-setmaxdowntime VMNAME 2500  Check migration status virsh domjobinfo …

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Because this was WAAYY more difficult to find any decent doco on that I had ever expected, here is what worked for me I deleted the netplan config file at /etc/netplan/01-netcfg.yaml 1rm /etc/netplan/01-netcfg.yaml Ensure that 'bonding' appears in /etc/modules (I's not here by default) 1echo bonding >> …

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1sudo dpkg --listfiles docker-ce

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1apt install oathtool 2oathtool --totp -b -d 6 KY3OUPMUYWCKS53F [https://stackpointer.io/unix/linux-totp-password-generator/629/][https://stackpointer.io/unix/linux-totp-password-generator/629/] https://github.com/philipsharp/FreeOTPDecoder Enable USB debugging - …

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