Tip : Shutting down your system automatically

Welcome again,
this post I've a tip for you, it is how to shut down your system automatically, such operation required a tool in the past when I was operating windows, but now, you can do it without any additional tools, just your system :)

the command is shutdown, and here is the syntax

shutdown -P [time]

this command require root access on the system, and very flexible too, you can use it in many diffrent ways,

here are some examples of using the command:

shutdown -P now
this command will shutdown the system immediately

shutdown -P 10:23
this will shutdown the system on 10:23 AM

shutdown -P 22:23
this will shutdown the system on 10:23 PM

shutdown -P +15
this will shutdown the system after 15 minutes

the command has lot of options you can test it,

that's all for the moment

YUM segmentation fault in fedora 10 >>> It's Fix

the Problem

While I was updating my fedora 10. I accidentally restarted my PC.
after restating the PC. I tried to update the packages by package managers it takes too long.
I used the # yum update  command it give me the error message "Segmentation fault" and aborts.

I searched for the solution and found this one.

the reason

this error is a result of a corruption in RPM Database Files located int /var/lib/rpm/
 
how i fixed it

by executing the following commands ( while I'm root )

# rm -f /var/lib/rpm/__db*
# rpm --rebuilddb

It worked for me hope it works for you too ;)

more details about this problem and RPM DB Recovery

RPM DB Recovery in Details (RHEL 3 )

Working With the RPM Database (Fedora)

How to "repair" /var/lib/rpm/Packages

the solution posted here was found in the following link
yum Segmentation fault