What are some time-saving tips that every Linux user should know?

Here's the link

I ran across this information while browsing quora.com, a crowdsourcing site for answering everyday questions from normal people. It's a very active community with some good gems of information.

Impact 7.1.0.2 recently released

And we've been able to do some pretty amazing stuff with it. Specifically, we've been able to pull ITNM multi-parent topology information into DASH using an Impact policy and display that data without using Java - only HTML5/JavaScript/CSS. Here's a screenshot of that data in DASH:

This is a better view of the data, with correct icons and state information:

Cloud Computing Simplified

IBM really produces a TON of great information on all computer-related topics. One they recently released is this redpaper on Cloud Computing, available here: http://www.redbooks.ibm.com/abstracts/redp5179.html?Open . From the abstract:

"Starting with the basic building blocks of cloud computing, we cover a wide range of cloud topics in this book. We do not go into details of specific cloud products on the market, so this book serves as a cloud primer for readers who are new to this exciting technology. If you are already familiar with the fundamentals of cloud computing and would like to explore more advanced cloud topics, you can still benefit from this book. Each section is independent of the others, so it is OK to skip the sections you are familiar with and go directly to the section you’d like to read first"

IBM InterConnect Presentation - Application Performance Management and IT Service Management Best Practices

The following presentation was presented at IBM InterConnect 2015.

Download Link - via Google Drive

PDF - SCO 2.3.0.1 Troubleshooting VMControl Image Issues in Glance

ICO all-in-one deployment doesn't install Workload Deployer

The ICO 2.4 and 2.4.0.1 Deployment Server installers are definitely great pieces of software. They check prerequisites correctly and install without a hitch. They are really, really nice.

This post is about one of the options in the 'ds wizard' script options. Specifically, when you take the path:

[0] New IBM Cloud Orchestrator deployment.
[0] Demo
[1] All In One
[2] All In One IBM Cloud Orchestrator Deployment
   - Deploys IBM Cloud Orchestrator all-in-one in one machine.


This path actually deploys the template sco-devstack (/opt/ico_install/topology_templates/sco_devstack.json), which does NOT install the IBM Workload Deployer component. The effect that this has is that you do NOT have a PATTERNS option in the Administrator GUI (https://machine.fqdn:8443/), and so you can't create, view or use any patterns.

So if you want an all-in-one deployment, you should take a different option. Specifically, the path you should take through the wizard is:

[0] New IBM Cloud Orchestrator deployment.
[0] Demo
[1] All In One
[2] All In One IBM Cloud Orchestrator Deployment 
[0] All In One with addtional KVM compute node
   - Deploys IBM Cloud Orchestrator all-in-one KVM topology with an additional KVM compute node where components use a shared 
   - internal database.

And when it asks you for the FQDNs of the three servers, specify the FQDN of the ONE server that you'll be using in each of those three places.

A BIG note about running ICO 2.4.0.1

I successfully installed ICO 2.4.0.1 using 2 machines:

1: Deployment Server (where I could then run the 'ds wizard' command)

2: My all-in-one deployment to a KVM hypervisor.

Both machines are running RHEL 6.5 and have lots of CPU, RAM and disk.

My HUGE problem after install was that the Deployment Server automatically started an unnecessary dnsmasq process. And because of this, I could not create any new instances. Every time I tried, I got errors similar to the following in /var/log/nova/compute.log (and similar in network.log also):

2015-01-27 13:29:14.987 19521 ERROR oslo.messaging.rpc.dispatcher [-] Exception during message handling: Remote error: ProcessExecutionError Unexpected error while running command.
Command: sudo nova-rootwrap /etc/nova/rootwrap.conf env CONFIG_FILE=["/etc/nova/nova.conf"] NETWORK_ID=3 dnsmasq --strict-order --bind-interfaces --conf-file=/etc/dnsmasq.conf --pid-file=/var/lib/nova/networks/nova-br1002.pid --listen-address=10.10.1.3 --except-interface=lo --dhcp-range=set:franknet,10.10.1.3,static,255.255.255.0,120s --dhcp-lease-max=256 --dhcp-hostsfile=/var/lib/nova/networks/nova-br1002.conf --dhcp-script=/usr/bin/nova-dhcpbridge --leasefile-ro --domain=novalocal --no-hosts --addn-hosts=/var/lib/nova/networks/nova-br1002.hosts
Exit code: 2
Stdout: u''
Stderr: u"2015-01-27 13:29:13.983 10307 INFO nova.openstack.common.periodic_task [req-0d06a702-1f2a-4b95-a8f3-0f8665d4c83b None None] Skipping periodic task _periodic_update_dns because its interval is negative\n2015-01-27 13:29:13.985 10307 INFO nova.network.driver [req-0d06a702-1f2a-4b95-a8f3-0f8665d4c83b None None] Loading network driver 'nova.network.linux_net'\n2015-01-27 13:29:13.986 10307 DEBUG nova.servicegroup.api [req-0d06a702-1f2a-4b95-a8f3-0f8665d4c83b None None] ServiceGroup driver defined as an instance of db __new__ /usr/lib/python2.6/site-packages/nova/servicegroup/api.py:65\n2015-01-27 13:29:14.107 10307 DEBUG stevedore.extension [-] found extension EntryPoint.parse('file = nova.image.download.file') _load_plugins /usr/lib/python2.6/site-packages/stevedore/extension.py:156\n2015-01-27 13:29:14.121 10307 DEBUG stevedore.extension [-] found extension EntryPoint.parse('file = nova.image.download.file') _load_plugins /usr/lib/python2.6/site-packages/stevedore/extension.py:156\n\ndnsmasq: failed to create listening socket for 10.10.1.3: Address already in use\n"
[u'Traceback (most recent call last):\n', u'  File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 134, in _dispatch_and_reply\n    incoming.message))\n', u'  File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 177, in _dispatch\n    return self._do_dispatch(endpoint, method, ctxt, args)\n', u'  File "/usr/lib/python2.6/site-packages/oslo/messaging/rpc/dispatcher.py", line 123, in _do_dispatch\n    result = getattr(endpoint, method)(ctxt, **new_args)\n', u'  File "/usr/lib/python2.6/site-packages/nova/network/floating_ips.py", line 193, in deallocate_for_instance\n    super(FloatingIP, self).deallocate_for_instance(context, **kwargs)\n', u'  File "/usr/lib/python2.6/site-packages/nova/network/manager.py", line 563, in deallocate_for_instance\n    instance=instance)\n', u'  File "/usr/lib/python2.6/site-packages/nova/network/manager.py", line 246, in deallocate_fixed_ip\n    address, instance=instance)\n', u'  File "/usr/lib/python2.6/site-packages/nova/network/manager.py", line 980, in deallocate_fixed_ip\n    self._teardown_network_on_host(context, network)\n', u'  File "/usr/lib/python2.6/site-packages/nova/openstack/common/lockutils.py", line 249, in inner\n    return f(*args, **kwargs)\n', u'  File "/usr/lib/python2.6/site-packages/nova/network/manager.py", line 1906, in _teardown_network_on_host\n    self.driver.update_dhcp(elevated, dev, network)\n', u'  File "/usr/lib/python2.6/site-packages/nova/network/linux_net.py", line 1004, in update_dhcp\n    restart_dhcp(context, dev, network_ref)\n', u'  File "/usr/lib/python2.6/site-packages/nova/openstack/common/lockutils.py", line 249, in inner\n    return f(*args, **kwargs)\n', u'  File "/usr/lib/python2.6/site-packages/nova/network/linux_net.py", line 1118, in restart_dhcp\n    _execute(*cmd, run_as_root=True)\n', u'  File "/usr/lib/python2.6/site-packages/nova/network/linux_net.py", line 1211, in _execute\n    return utils.execute(*cmd, **kwargs)\n', u'  File "/usr/lib/python2.6/site-packages/nova/utils.py", line 165, in execute\n    return processutils.execute(*cmd, **kwargs)\n', u'  File "/usr/lib/python2.6/site-packages/nova/openstack/common/processutils.py", line 196, in execute\n    cmd=sanitized_cmd)\n', u'ProcessExecutionError: Unexpected error while running command.\nCommand: sudo nova-rootwrap /etc/nova/rootwrap.conf env CONFIG_FILE=["/etc/nova/nova.conf"] NETWORK_ID=3 dnsmasq --strict-order --bind-interfaces --conf-file=/etc/dnsmasq.conf --pid-file=/var/lib/nova/networks/nova-br1002.pid --listen-address=10.10.1.3 --except-interface=lo --dhcp-range=set:franknet,10.10.1.3,static,255.255.255.0,120s --dhcp-lease-max=256 --dhcp-hostsfile=/var/lib/nova/networks/nova-br1002.conf --dhcp-script=/usr/bin/nova-dhcpbridge --leasefile-ro --domain=novalocal --no-hosts --addn-hosts=/var/lib/nova/networks/nova-br1002.hosts\nExit code: 2\nStdout: u\'\'\nStderr: u"2015-01-27 13:29:13.983 10307 INFO nova.openstack.common.periodic_task [req-0d06a702-1f2a-4b95-a8f3-0f8665d4c83b None None] Skipping periodic task _periodic_update_dns because its interval is negative\\n2015-01-27 13:29:13.985 10307 INFO nova.network.driver [req-0d06a702-1f2a-4b95-a8f3-0f8665d4c83b None None] Loading network driver \'nova.network.linux_net\'\\n2

Once I killed the offending dnsmasq process, I could successfully create instances.

SOURCE: http://fedoraproject.org/wiki/QA:Testcase_launch_an_instance_on_OpenStack