How To Fix YUM Update Errors with Percona GPG Keys

Author: erics, April 16th, 2019

Problem: Trying to run a yum -y update as root aborts with the following error:

The GPG keys listed for the "Percona-Release YUM repository - x86_64" repository are already installed but they are not correct for this package.
Check that the correct key URLs are configured for this repository.

 Failing package is: sysbench-1.0.17-2.el6.x86_64
 GPG Keys are configured as: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-Percona

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The GPG keys listed for the "Percona-Release YUM repository - x86_64" repository are already installed but they are not correct for this package.

Check that the correct key URLs are configured for this repository.

Failing package is: sysbench-1.0.17-2.el6.x86_64

GPG Keys are configured as: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-Percona

The solution, found on the Percona website, is this: sudo yum update percona-release Source URL: https://www.percona.com/blog/2019/02/05/new-percona-package-signing-key-requires-update-on-rhel-and-centos/

Categories: How-To's, Technology Tags: GPG, howto, key, Keys, Percona, percona-release, release, tips, update, Yum, yum update | 1 comment

How To Disable the Brightness Keys in MacOSX

Author: erics, July 26th, 2012

Download and install the prefpane FunctionFlip. Then set the F1 and F2 keys to default to having Fn pressed, which effectively disables the “Change Brightness” feature… http://kevingessner.com/software/functionflip/

Categories: How-To's, Technology Tags: apple, Bright, Brightness, Brightness Key, Disable, Flip, Function, Function Flip, FunctionFlip, howto, Keys, macosx, Pane, Preference, Preference Pane, System Preferences, tips | No comments

How To Loop Through Objects In JavaScript

Author: erics, May 15th, 2011

Coming from the Perl world, I wanted to emulate the following code in JavaScript:

   my $myHash = {
      'foo' => 'Hello',
      'bar' => 'World',
   };
   foreach my $myKey (keys %$myHash) {
      print $myKey,'=',$myHash->{$myKey};
   }

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my $myHash = {

'foo' => 'Hello',

'bar' => 'World',

};

foreach my $myKey (keys %$myHash) {

print $myKey,'=',$myHash->{$myKey};

}

What I found is that JavaScript uses “Objects” to contain hash-style data:

    // Define the hash object on the fly
    var myHash = { 
        foo: "Hello",
        bar: "World"
    };

    // loop through all keys  
    for (var myKey in myHash) {
        alert(myKey + '=' + myHash[myKey]);
    }

    // access a key individually
    alert('foo=' + Hash.foo);
    alert('bar=' + Hash.bar);

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// Define the hash object on the fly

var myHash = {

foo: "Hello",

bar: "World"

};

// loop through all keys

for (var myKey in myHash) {

alert(myKey + '=' + myHash[myKey]);

}

// access a key individually

alert('foo=' + Hash.foo);

alert('bar=' + Hash.bar);

Also, one may use variables as key names by using the square-bracket notation, which evaluates variables first:

   var myVar = 'test';
   //These two lines are equivalent as long as myVar is 'test':
   myHash[myVar] = 'theValue';
   myHash.test = 'theValue';

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var myVar = 'test';

//These two lines are equivalent as long as myVar is 'test':

myHash[myVar] = 'theValue';

myHash.test = 'theValue';

Categories: How-To's, Technology Tags: array, Hash, Iterate, javascript, Keys, Loop, Object, perl | No comments

How To Fix YUM Update Errors with Percona GPG Keys

How To Disable the Brightness Keys in MacOSX

How To Loop Through Objects In JavaScript

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