![]() If you have any questions or feedback, let us know in the comments below. You can see memory usage by executing this code in your terminal: watch -n 1 'ps -U (whoami) -eom pid,pmem,pcpu,comm head -n4'. The ps command is a complex command and mastering it comes a long way in properly administering the system and even for using the output in an automation script.ĭo refer to the manual page of ps command by running the command: $ man ps steps: top shift + F select a column from the list e.g. In this article, we saw how to use the ps command to see top resource-consuming processes in Linux. You can simply increase the argument to ‘head’ in such cases, for example, to 12 or 14 whichever will bring the number of output processes to 10. Note that due to some command names being longer and using a new line in the output, ‘head -10’ will consider this new line. You can also use the free command to display the amount of. Additionally, you can use the command top to display a full list of processes, including their memory usage. This will show the memory usage of all running processes on the system. Find Top Running Processes by Memory Usage $ ps aux -sort -%memįind Running Processes by Memory Usage Find Top Running Processes by CPU Usage $ ps aux -sort -%cpuįinally, to limit the number of processes shown to 10, we pipe the output to the head command. To check the process memory usage on a Linux system, you can use the command ps aux. Since we want the top 10 processes by memory and CPU usage, we will sort the output by reverse, and put these columns as the column name argument. List Top 10 Linux Processes by Memory and CPU Usage Similarly, to reverse sort the output, the following can be used: $ ps aux -sort -Īny column from the output can be specified in. The syntax for using the sort argument is: $ ps aux -sort Now, we will use the argument '-sort' to sort the output by memory and CPU usage. $ ps auxĪs we can see above, CPU and memory usage are shown in the columns %CPU and %MEM respectively along with other information about the running processes. However, it can be simply run with the argument ‘aux’ to get a general overview of running processes. The ps command has a lot of options and arguments available to display output in different formats. ![]() Today we will see how to see the top 10 heaviest memory and CPU resource-consuming processes in Linux using a command-line tool called ps command, which is used to display information about running processes in Linux. Combine the knowledge of Linux commands and shell scripting and you have a proper toolkit of system administration at your disposal. This is one of the reasons why Linux is a preferred operating system for servers and administrative machines. 4.Linux is quite popular for its command-line utilities, which not only make any task at hand easier but also saves a lot of time, which is otherwise wasted in graphical UI based utilities. The -r option will reverse the output, which will print the list in descending order. Let’s say we want to print the top 10 processes sorted by swap memory usage in descending order. Once smem is installed, we can try it out in the terminal: $ smemĤ94 hey swaybg -o DVI-I-1 -i /home/ 15136 4 86 2304ġ665 hey /opt/discord/Discord -type 8800 0 96 820ĥ89 hey /usr/lib/pulse/gsettings-he 1224 ģ7348 hey /bin/sh /usr/bin/android-st 204 1 The number of the directory is actually the PID of the process. However, we’re only concerned with the numbered directories because they correspond to each running process. Now that we have an idea about the proc directory, let’s see what’s inside it: $ ls -l /procĭr-xr-xr-x 9 root root 0 Feb 17 15:35 100ĭr-xr-xr-x 9 hey hey 0 Feb 17 22:12 34160Īs we review the list of items inside this directory, we’ll notice that there are a lot of numbered directories, named directories, and other virtual files. The information inside these files is generated on the fly once we read them. Moreover, the virtual files inside this directory have no physical size on the disk. The operating system creates this directory once we boot into the Linux machine. On Linux, proc is a special directory that contains information about the Linux kernel, its configuration, and processes loaded into the physical memory.
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