.\" .\" wrmsr(1) .\" .\" Copyright (C) 2008 Andres Salomon .TH wrmsr 1 "Mar 2008" .SH NAME wrmsr \- tool for writing CPU machine specific registers (MSR) .SH SYNOPSIS .B "wrmsr [options] regno value" .SH DESCRIPTION .B wrmsr is a tool used for writing values to a CPU's machine specific registers (MSR). .br Note: if you're running a Debian kernel, be sure that the msr.ko kernel module is loaded. 'modprobe msr' should do the trick. Otherwise, you'll get an error about .B wrmsr not being able to open files in /dev/cpu/... .SH OPTIONS .TP .B --help, -h Print a list of available options .TP .B --version, -V Print current version .TP .B --all, -a All processors .TP .B --processor <#>, -p Select processor number (default: 0) .TP .BR .SH SEE ALSO .BR rdmsr(1) .SH AUTHOR .br .B wrmsr was written by Transmeta Corporation This man page was contributed by Andres Salomon for the Debian GNU/Linux system (but may be used by others).