Sometimes, when you try to install a program on Windows XP, you may receive the following error message like this :

This issue may occur when both the following condition are true :

• You are using Windows XP in Normal Mode.
• The Windows Installer Service that is included with Windows XP is unregistered or damaged.

^{Picture from Administrator.org}

Mikrotik has a tool to monitoring another machine and when the machine is down or up, we can running script. This tool is netwatch.

Netwatch monitors state of hosts on the network. It does so by sending ICMP pings to the list of specified IP addresses. For each entry in netwatch table you can specify IP address, ping interval and console scripts.

cat /etc/passwd | cut -d: -f1 | grep -v \#

The cut command selects portions of a file. Use ":" as the delimiting character. And we want only the first field. The grep eliminates lines with # in them, which normally appear at the start of the password file. Exercises for the interested and motivated:

• try the above command without the grep
• remove the \ before the #
• try -f5 instead of -f1.

Hope that helps.

Thank's to : The FreeBSD Diary

1. SPEEDUP FOLDER ACCESS - DISABLE LAST ACCESS UPDATE If you have a lot of folders and subdirectories on your computer, when you access a directory XP wastes a lot of time updating the time stamp showing the last access time for that directory and for ALL sub directories. To stop XP doing this you need to edit the registry. If you are uncomfortable doing this then please do not attempt.
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Some of the working tweaks you can do to your Windows XP can really be a blessing to your system’s speed. So I thought about sharing with you the safe tweaks on how to have a faster Windows XP. As a disclaimer do the following tweaks at your own risk.

1. Start/Run/GPEDIT.MSC
2. Computer Configuration/Administrative Templates/System.
3. Locate the entry for Turn Off Autoplay and modify.

This worm infecting user, by disguise user with Microsoft Windows folder icon, to open executable file that contain worm. How to delete: (From Linux console)