Author: Ciro Iriarte
Created: 2021-11-02 Updated: 2021-11-02

guacamole-reset-user-otp.sh is a quick script to disable OTP for a user for Guacamole (using native OTP module)

Default view

guacamole-reset-user-otp.sh the.user

Author: Ciro Iriarte
Created: 2025-06-05
Updated: 2025-06-07

nic-xray.sh is a diagnostic script that provides a detailed overview of all physical network interfaces on a Linux system. It displays:

• PCI slot
• Firmware version
• Interface name
• MAC address
• MTU
• Link status (with color)
• Negotiated speed and duplex
• Bond membership (with color)
• LLDP peer information (switch and port)

Originally developed for OpenStack node deployments, it is suitable for any Linux environment.

• Must be run as root
• Required tools:
  • ethtool
  • lldpctl
  • awk, grep, cat, readlink
• Switch configuration:
  • Switch should advertise LLDP messages
  • Cisco doesn't include VLAN information by default. Hint:

    lldp tlv-select vlan-name

• Copy the script to /usr/local/sbin for easy access:

  sudo cp nic-xray.sh /usr/local/sbin/
  sudo chmod +x /usr/local/sbin/nic-xray.sh

• Ensure lldpd service is running to retrieve LLDP information:

  sudo systemctl enable --now lldpd

Default view

sudo nic-xray.sh

Show VLAN information

sudo nic-xray.sh --vlan

Show LACP peer information

sudo nic-xray.sh --lacp

echo "Sorry, can't share"

Author: Ciro Iriarte Created: 2025-06-06 Updated: 2025-06-06

create-ssl-csr.shHelps to create a SSL Certificate Signing Request to be shared with a CA entity.

• Required tools:
  • openssl

Edit the variables to match your environment and run the script.

./create-ssl-csr.sh

Author: Ciro Iriarte
Created: 2025-09-10
Updated: 2025-09-10

Reports memory usage for KVM-based virtual machines using virsh. It provides host memory usage, per-VM allocation, and total memory consumption.

• Required tools:
  • virsh
  • awk, grep, sed

Run the script on a KVM host with libvirt installed:

./kvm-memory-usage-report.sh

Author: Ciro Iriarte
Created: 2025-09-10
Updated: 2025-09-10

Reports memory usage and optimization metrics for ESXi hosts and virtual machines. Uses native ESXi tools to extract host memory, per-VM allocation, and advanced metrics like ballooning, swapping, compression, and shared memory.

• Must be run directly on the ESXi host (via SSH or shell)
• Required tools:
  • virsh
  • awk, grep, sed

Run the script from the ESXi shell:

./esxi-memory-usage-report.sh