For the rest, you're likely making your system work harder (which stresses the battery*) by closing and re-opening apps regularly. It's really only poorly behaving apps that need to be closed. At some point RAM will be compressed and eventually written to the SSD and removed from RAM entirely (until you click the dock icon) and "well behaved" apps like Pages shouldn't touch your CPU at all. Mac OS generally does an excellent job of managing "idle" apps in the background and they don't do any harm. You could also purchase iStat Menus for more detailed monitoring (for example CPU usage charts, network activity, and battery icons for all your bluetooth devices). you can check which tab using the Activity Monitor app (you may have to click the arrow next to Safari to expand the tab list). This can be useful if you memorised the keyboard command and in the rare. Hold Alt/Option + Apple/Command + Escape. For your web browser, close any tabs that cause the browser to appear in the list. Apple Icon (on the top left corner of the screen)-> Force Quit. Close any app that appears regularly in there. Keep an eye on the "significant energy usage" feature built into the battery menu bar item. Removing two or three processes, or even ten of them by closing GUI apps typically won't make any difference at all. In the following example we are killing all the processes running on port 80 and 443.I just counted, there are 655 processes running on my Mac right now and 99% of them are in the background. To kill all the processes running on a given set of port numbers we use the following command kill -9 $(lsof -t -i :PORT1,PORT2.) where PORT1, PORT2 are port numbers. Keep an eye on the 'significant energy usage' feature built into the battery menu bar item. Kill all the processes running on a given ports I just counted, there are 655 processes running on my Mac right now and 99 of them are in the background. Similarly, if we want to kill all the processes on port 443 then we will run the following command. In the following example we are killing all the processes running on port 80. To kill all the processes running on a particular port we run the following command kill -9 $(lsof -t -i :PORT_NUMBER). Kill all the processes running on a given port In the following example we are killing all the processes belonging to user johndoe. To kill all the processes belonging to a particular user we run the following command kill -9 $(lsof -t -u username). Kill all processes belonging to a given user To list all the UDP connections we run the following command. To list all the TCP connections we run the following command. In the following example we are listing all the processes running on port 80 and 443. To list all the processes running on a set of port numbers we use the following command lsof -i :PORT1,PORT2. List all the process running on a given ports In the following example we are listing all the process running on port 443. In the following example we are listing all the processes running on port 80. To list all the process running on a given port we use the following command lsof -i :PORT_NUMBER. List all the process running on a given port In the following example we are listing all the open files with PID 1 and 2. command where PID1, PID2 are the PID values. If we want to list all the open files from a set of PIDs then we run the lsof -p PID1,PID2. In the following example we are listing all the process with PID 1. In case the files are not getting listed properly then we can add sudo to the command like sudo lsof -p PID. To list all the open files for a given PID we run the lsof -p PID command. To list all the IPv6 network files that are open we run the following command. To list all the IPv4 network files that are open we run the following command. In the following example we are listing all the files opened by user yusufshakeel. Add the matching PID to the aforementioned kill command, like so: kill -STOP 3138. To know your username run whoami command. From Activity Monitor, use the Search function in the upper right corner and type the application name you wish to suspend (e.g.: iTunes) With the matching processes and/or app (s) visible, locate the process ID by looking under the PID column. To list all the files opened by a user we use lsof -u username command where username is the name of the user. Value for TYPE column can be the following. There are other modes as well like r for read and w write. The FD column stands for file descriptor.įD column can also have values like 1u. Lsof 239 yusufshakeel cwd DIR 1,4 736 2 / We run the lsof command to list all the open files.ĬOMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME In this tutorial we will learn about lsof command.
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