Yes, certain versions of 'top' can change process priorities. However, you need sufficient priviledge to do that.
Chillax
The 'ps' command without arguments will give a summary of those processes running in the current environment.
The df command displays drive capacities. The free command will show memory usage. The top command will show the system load of various processes.
su command is used to change the user.
For Unix, any command is run as a sub-process. You don't need an actual command to create the subprocess. You can also force the process to run in the background by appending a '&' symbol at the end of the command.
Priority is a mechanism that concept is used when two or more process being processed at a time. In other words we would say "which process can be right to executed first among two or more processes" Generally priorities are several type. but system oriented types are 1. Static priority 2. Dynamic priority
Type top in a terminal to display Linux processes, which includes PID.
The ps command in Unix/Linux systems is used to display information about running processes. It provides details such as the process ID (PID), terminal associated with the process, CPU and memory usage, and the command that initiated the process. Common options include ps aux for a comprehensive view of all processes or ps -ef for a full-format listing. This command is useful for monitoring system activity and managing processes.
Shortest Job First (SJF) scheduling and priority scheduling are both CPU scheduling algorithms used in operating systems to manage process execution. SJF selects processes based on the shortest estimated execution time, while priority scheduling selects processes based on their assigned priority levels. In some cases, SJF can be viewed as a specific type of priority scheduling where the priority is inversely related to the job length—the shorter the job, the higher its priority. Thus, both approaches aim to optimize CPU utilization but differ in the criteria they use for process selection.
The CHGRP command is used to change the ownership of a specific file or directory. More information about this command can be found on the IBM Help Index website.
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