Upgrading Ubuntu desktop or headless server

      1. Upgrade existing software.
        sudo apt update && sudo apt dist-upgrade
      2. Make sure you have update-manager-core package installed.
        sudo apt install update-manager-core
      3. Edit the configuration fileĀ /etc/update-manager/release-upgrades

        sudo nano /etc/update-manager/release-upgrades
      4. Change the value of Prompt from lts to normal.
      5. Save and close the file andĀ run the following command to begin the upgrade process and follow the on-screen instructions.
        sudo do-release-upgrade
      6. Once the upgrade is finished, reboot your Ubuntu desktop or server.
      7. To check your Ubuntu version, run:
        lsb_release -a



Throttling bandwidth in CISCO ASA 5505

This example shows how to throttle the bandwidth to 1 Mbps for a specific user in the outbound direction.

  1. Create access list:
    ciscoasa(config)# access-list WEB-LIMIT permit ip host any
    ciscoasa(config)# class-map Class-Policy
    ciscoasa(config-cmap)# match access-list WEB-LIMIT
  2. Create policy map:
    ciscoasa(config)# policy-map POLICY-WEB
    ciscoasa(config-pmap)# class Class-Policy
    ciscoasa(config-pmap-c)# police output 1000000 conform-action transmit exceed-action drop
  3. Enable the policy:
    ciscoasa(config)# service-policy POLICY-WEB interface outside

Enable SNMP on ESXi 6.5

  1. SSH or Telnet to your ESXi node using root-level credentials.
  2. Execute the following commands. Replace YOUR_STRING with your desired community string.
    esxcli system snmp set -r
    esxcli system snmp set -c YOUR_STRING
    esxcli system snmp set -p 161
    esxcli system snmp set -L "City, State, Country"
    esxcli system snmp set -C noc@example.com
    esxcli system snmp set -e yes
  3. Check status in Host –> Manage –> Services, you should see snmpd as “Running”