How does nice command work

While the nice command is used while launching programs, the renice command lets you change the priority of a running process. For example, here's how we changed the priority of the already-running 'test-new' process from 5 to The above command will change the priority of all processes belonging to the group 'howtoforge'. Of course, a normal Linux command line user won't usually get in situations where-in these tool are needed, but it's always good to have knowledge of important command line tools, and nice and renice are among them.

The good thing is that the learning curve associated with them isn't steep at all. We have already discussed majority of options here. For more info on these utilities, head to their man pages - here and here.

It means that the expected value is a PID, than the process and all sub processes will be affected. You are misusing the term "priority". This doesn't work. Your article doesn't help.

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What is UUID used in fstab. OpenStack Tutorial: Getting started with basics of building your own cloud. Jump back to navigation. Be a fan on Facebook. Recent Posts. Archives - 3 years 6 months ago. Difference Between. Determining the default niceness value of new processes Different OS distributions can have different default values for new processes.

Determining the niceness value of a current process The niceness value of current processes are also pretty simple to find as they are visible in the ps command's long format. Making a process nicer, decreasing the CPU Priority Niceness values range from the highest priority, lowest niceness and 19 the lowest priority, highest niceness. Changing the nice value of a new process Changing the niceness value of a new process is fairly simple. Changing the nice value of a running process To change the niceness value of a running process we will utilize the renice command.

In this example we will be adjusting the priority of the sshd process I showed above. Making a process less nice, increasing CPU priority Now that we have adjusted processes to becoming nicer to the system, let us make a process that is less nice. Changing the nice value of a new process The method of changing a process to be less nice is the same as making a process nicer.

Example: nice -n