![]() This command is particularly useful when you’re dealing with a large number of processes and need to find a specific one quickly. This output is then passed to the grep command, which searches for and displays lines containing the processname. So, when you run ps -ef | grep processname, the ps -ef command generates a detailed list of all processes. ![]() When you replace processname with the actual name of the process, grep will filter out all lines that contain that process name. The processname is the name of the process you’re looking for. In the context of ps -ef | grep processname, grep is used to search the output of ps -ef for a specific process name. Grep is a command-line utility used to search text or output based on specified patterns. In this case, it sends the output of the ps -ef command to the grep command. It is used to redirect the output of one command to the input of another. The pipe symbol | is a key component of this command. This includes additional details such as the UID, PID, PPID, C, STIME, TTY, TIME, and CMD. The -f option instructs ps to display full format listing. The -e option tells ps to display all processes, not just those associated with the current user. The -ef option is used in conjunction with the ps command. It provides information such as the process ID (PID), the time the process has been running, the command that started the process, and more. Understanding these commands and their differences is crucial for effective system administration and troubleshooting.The ps command is used in Linux to list the currently running processes. If you need a more concise output, ps -ef would be the better choice. If you need more detailed information, ps aux is the way to go. The choice between them depends on the level of detail you require. Conclusionīoth ps -ef and ps aux are powerful commands for monitoring processes in Unix and Linux systems. ps -ef displays the UID, while ps aux displays the username. ps -ef provides a more concise output, while ps aux provides more detailed information about the processes.Īnother key difference is the way they display user information. The main difference between ps -ef and ps aux lies in the format of the output. ![]() COMMAND: The command that started this process.START: Starting time or date of the process.RSS: Resident set size, the non-swapped physical memory that a task has used.VSZ: Virtual memory usage of entire process.%MEM: The percentage of RAM used by this job.%CPU: The percentage of the CPU that this job got.The output columns for ps aux are: USER, PID, %CPU, %MEM, VSZ, RSS, TTY, STAT, START, TIME, and COMMAND. x: Also show processes not attached to a terminal.On the other hand, ps aux also displays all processes of all users, but in a user-oriented format. CMD: The command that started this process.TTY: Terminal type associated with the process.PPID: Parent process ID (the process that launched this process).UID: User ID that this process belongs to.The output columns are: UID, PID, PPID, C, STIME, TTY, TIME, and CMD. So, ps -ef will display all processes in a full format listing. ![]() -f: This stands for “full format listing”.-e: This option is for selecting all processes.The ps -ef command is used to display all the currently running processes in the system. It is used to provide information about the currently running processes, including their process identification numbers (PIDs). Conclusion Understanding the ps Commandīefore diving into the differences, let’s first understand the ps command.
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