How to edit the Grub2 bootloader entries (used for some new linux distros, e.g. Ubuntu Karmic)

Posted on March 7, 2010 by Ahmed Tawfik

I used to edit the “/boot/grub/menu.lst”, that’s not the case in grub2:

  1. Firstly, you should edit the “/etc/default/grub”
  2. Next, run the “update-grub” command, that’s it 🙂
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How to change the default CPU governer (CPU Frequency) in Ubuntu Karmic (might work for other versions as well)

Posted on March 5, 2010 by Ahmed Tawfik

The problem is that no matter what, when I change the CPU governer using the “CPU Frequency Scaling” gnome applet in my Ubuntu Karmic, it always defaults to “ondemand”, I searched in some forums and finally developed a nice and easy way:

  1. Set the frequency you need via the CPU Frequency Scaling applet (per CPU core)
  2. Rename or remove the “/etc/init.d/ondemand” file, I prefer you rename it, much safer I guess :), i.e. “sudo mv /etc/init.d/ondemand /etc/init.d/ondemand.bak”
  3. Reboot and see it working yourself 🙂
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How to change the gnome default keyring password in Ubuntu Karmic (may apply to other versions as well)

Posted on March 5, 2010 by Ahmed Tawfik

After I initially set it, I needed to change it so that it matches my login password:

  1. Open a terminal
  2. type “seahorse”
  3. Right-click on “Passwords: login” and click “change password”
  4. Type your old password and then your new one.
  5. Done!

 enjoy 🙂

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How to raise the log level for all events for a Siebel component from the Siebel CLI

Posted on February 24, 2010 by Ahmed Tawfik

“change evtloglvl %= log_level for comp component_name“

Thanks go to Osama Magdy for the info 🙂

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How to edit scheduled jobs (crontab) on AIX

Posted on February 23, 2010 by Ahmed Tawfik

A very useful link: http://publib.boulder.ibm.com/infocenter/discover/v8r4/index.jsp?topic=/com.ibm.discovery.ds.publish.doc/c_UG_Configuring_Cron_Job.htm

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