downtimed is a daemon process which is intended to be started automatically from system boot scripts every time when the operating system of a server starts. First the daemon logs its findings about the previous downtime to a specified logging destination as well as in a database file which can be displayed with downtimes command.
Thereafter the downtimed daemon just keeps waiting in the background and periodically updates a time stamp file on the disk. The time stamp is used to determine the approximate time when the system was last up and running. In case of a graceful system shutdown it records a stamp to another file on the disk. These files are used for reporting the next time the daemon starts.
downtimes is a command-line tool which can be used to inspect previous downtime records recorded in the downtime database file.
This sofware works currently on recent FreeBSD and GNU/Linux based operating system distributions. It can be ported to other modern UNIX-like operating systems relatively easily. The software is available under Simplified BSD license.
Install downtimed in ubuntu 10.04
Open the terminal and run the following commands
sudo add-apt-repository ppa:snabb/downtimed
sudo apt-get update
sudo apt-get install downtimed
downtimes [-d downtimedbfile] [-n num] [-s sleep]
-d downtimedbfile- Use the specified downtime database file instead of the system default.
-n num Define how many latest downtime records to output. Default is all.
-s sleep -- Calculate the approximate crash time by specifying what was the sleep value of downtimed.
-v Display the program version number, copyright message and the default settings.
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