Q. I would like to restrict number of CPU activated for some software licensing issues under Linux kernel 2.6.xx.. How can I limit the number of CPUs activated in SMP mode? A. Pass a special parameter called maxcpus to kernel. It specify maximum number of processors that an SMP Linux kernel should make use of. […]
So, how do you find Linux or UNIX-like systems last reboot/shutdown date and time? The last utility will either list the sessions of specified users, ttys, and hosts, in reverse time order, or list the users logged in at a specified date and time. Each line of output contains the user name, the tty from which the session was conducted, any hostname, the start and stop times for the session, and the duration of the session.
You may wonder – why should I shutdown the Linux box box automatically? It depends upon your situation. For example, your downloading couple of tar balls and you want to go home. You can schedule a job to shutdown Linux after downloading is completed. Linux/UNIX/BSD/OS X comes with at and cron commands to automate task. Almost all common task can be automated using at command.