The Age has published a remarkably stupid article about terrorism titled “It’s hard to prevent the hard to imagine” which contains some amusing statements such as “a plan to use liquid explosives hidden in soft-drink bottles and destroy commercial jets crossing the Atlantic. The scale of this plot, combined with the innovative bomb design, threatened […]
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# foo=bar # name=foo # echo ${!name} bar The above example shows how to make a bash environment variable reference the value of another. # echo ${!f*} foo fs_abc_opts fs_name The above example shows how to get a list of all variables beginning with “f” (NB the wildcard can only go at the end). Related posts: Heartbeat service scripts A service script for Heartbeat needs to support at least… Ben Fowler writes about the issues related to nuclear power in Australia. He spends 8 paragraphs discussing the issues on the “Right” side of politics – of which 6 concern the an Australian nuclear weapons capability and then spends 3 out of 5 paragraphs related to the “Left” side explaining that he thinks that everyone […] The first thing you need is to have meta keywords in the pages. The solution I discovered for doing this is the All In One SEO Pack, this automatically makes the categories of a blog post become meta keywords, allows adding arbitrary meta keywords when editing the blog post, and supports keywords for the entire […] In my last post about Heartbeat I gave an example of a script to start and stop a cluster service. In that post I omitted to mention that the script goes in the directory /usr/lib/ocf/resource.d/heartbeat. To actually use the script you need to write some XML configuration to tell Heartbeat which parameters should be passed […] A service script for Heartbeat needs to support at least three operations, start, stop, and status. The operations will return 0 on success, 7 on failure (which in the case of the monitor script means that the service is not running) and any other value to indicate that something has gone wrong. In the second […] Below is a sample script to configure the ssh STONITH agent for the Heartbeat system. STONITH will reboot nodes when things go wrong to restore the integrity of the cluster. The STONITH test program supports the -n option to list parameters and the -l option to list nodes. The following is an example of using […] |
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