<sect2><title> </title><para> </para></sect2> <sect2><title>Short descriptions</title> <para><command>free</command> reports the amount of free and used memory in the system, both physical and swap memory.</para> <para><command>kill</command> is used to send signals to processes.</para> <para><command>pgrep</command> looks up processes based on their name and other attributes.</para> <para><command>pkill</command> signals processes based on their name and other attributes.</para> <para><command>pmap</command> reports the memory map of the given process.</para> <para><command>ps</command> gives a snapshot of the current processes.</para> <para><command>skill</command> sends signals to processes matching the given criteria.</para> <para><command>snice</command> changes the scheduling priority of processes matching the given criteria.</para> <para><command>sysctl</command> modifies kernel parameters at run time.</para> <para><command>tload</command> prints a graph of the current system load average.</para> <para><command>top</command> displays the top CPU processes. It provides an ongoing look at processor activity in real time.</para> <para><command>uptime</command> reports how long the system has been running, how many users are logged on, and the system load averages.</para> <para><command>vmstat</command> reports virtual memory statistics, giving information about processes, memory, paging, block IO, traps, and CPU activity.</para> <para><command>w</command> shows which users are currently logged on, where and since when.</para> <para><command>watch</command> runs a given command repeatedly, displaying the first screenful of its output. This allows you to watch the output change over time.</para> <para><command>libproc</command> contains the functions used by most programs in this package.</para> </sect2>