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Some useful *NIX commands

March 12, 2008

This is a collection of some *NIX commands (i’m using it on a FreeBSD  6.2), to manage some system process and signals.

wait -> It restore the second plane of the terminal until the process is running. You can type new commands, but it will be executed when the process ends.

[command] > /dev/null & -> This will not show the messages that the command print in the screen.

nice -> This command sets the priority of a process. The priority range goes from -20 to +20. To use it, type “nice +15 [process]”. You can also add a rule to a user or group using the “-g” and “-u” modifiers.

time -> This command allows you to watch how much time a process needs to execute.

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