Tag: Cloud

  • Oracle Cloud

    https://www.oracle.com/cloud/free/ – Every free account have 2 servers free for life. Only for development purpose.
    Allow ICMP (ping) in Oracle Cloud
    Updating Kernel on Oracle Linux with Ksplice
    How to Open Port on Oracle Cloud Ubuntu Server

    See Cloud

  • Allow ICMP (ping) in Oracle Cloud

    Allow ICMP (ping) in Oracle Cloud

    Oracle cloud do not allow ICMP/ping to compute instances. To enable ping, you need to enable ICMP in the security group.

    On your compute instance details page, you will see “Virtual Cloud Network”.

    oracle cloud vpc

    Click on Virtual Cloud Network link, that will take you to page with VPC details.

    Oracle Virtual Cloud Network

    Scroll down, you will see subnet.

    Oracle Cloud Public Subnet

    Click on Public Subnet, on next page, it shows details about the subnet. Under Security Lists, you will see Default Security List for VirtualCloudNetwork. Click on it to see your firewall rules.

    oracle cloud ingress rules

    Click Add Ingress Rules button to add new rule. By default port 22 (SSH) allowed from everyone. ICMP was blocked for everyone (rule 2 and 3).

    To allow ICMP, you can add a new Rule for ICMP.

    Oracle Cloud Add Ingress Rule

    On Add Ingress Rules page, select

    SOURCE TYPE = CIDR
SOURCE CIDR = 0.0.0.0/0
IP PROTOCOL = ICMP

    Click Add Ingress Rules button. Now you should be able to ping to any compute instances on this VPC. It is safe to remove 2 of the existing ICMP rules or edit them instead of adding new rule.

    See Oracle Cloud

  • Manage XenServer from command line with xe

    xe command is used to manage XenServer from command line

    [root@ns319379 ~]# xe help
Usage: xe  [-s server] [-pw passwd] [-p port] [-u user] [-pwf password-file]
  [command specific arguments]

To get help on a specific command: xe help 
To get a full listing of commands: xe help --all

Common command list
-------------------
    cd-list, diagnostic-vm-status, network-list, snapshot-clone
    snapshot-copy, snapshot-disk-list, snapshot-export-to-template
    snapshot-reset-powerstate, snapshot-revert, snapshot-uninstall, sr-list
    template-export, template-uninstall, vm-cd-add, vm-cd-eject
    vm-cd-insert, vm-cd-list, vm-cd-remove, vm-checkpoint, vm-clone
    vm-compute-maximum-memory, vm-copy, vm-disk-add, vm-disk-list
    vm-disk-remove, vm-export, vm-import, vm-install, vm-list, vm-migrate
    vm-pause, vm-reboot, vm-reset-powerstate, vm-resume, vm-shutdown
    vm-snapshot, vm-snapshot-with-quiesce, vm-start, vm-suspend
    vm-uninstall, vm-unpause, vm-vif-list
[root@ns319379 ~]#

    To list VM, run

    [root@ns319379 ~]# xe vm-list
uuid ( RO)           : 18e4994d-e536-9ab1-5fd3-ed3ba98cafa2
     name-label ( RW): XOA
    power-state ( RO): running


uuid ( RO)           : 1c8c3087-9afa-f040-4544-f77be88f0d83
     name-label ( RW): XOA
    power-state ( RO): halted


uuid ( RO)           : 7461bdf5-8986-471d-9067-01d12bf38f99
     name-label ( RW): Control domain on host: stock.ovh.net
    power-state ( RO): running


uuid ( RO)           : 56e60d30-15a7-ed07-c526-a17a81d692b4
     name-label ( RW): centos-webmin
    power-state ( RO): halted


[root@ns319379 ~]#