Mar 26, 2023 · We can easily check the process start time in Linux using the ps command. Open the terminal and type ps -p pid -o lstart,start,etime,etimes. It will list the process start time in the command output.

Dec 7, 2024 · The ps command (at least the procps version used by many Linux distributions) has a number of format fields that relate to the process start time, including lstart which always gives the full date and time the process started:

Apr 30, 2006 · Learn how to find out Linux or UNIX-like systems last reboot date and time from a shell prompt using last and who commands.

Jul 6, 2017 · How to find out the start time and date of a long-running processes in Linux using PS command.

Mar 14, 2011 · The "btime" line gives the time at which the system booted, in seconds since the Unix epoch.

Mar 18, 2024 · In this article, we learned how to get start time information of a long-running Linux process in several formats.

If you want only the start time, you can select the field and suppress the header by doing this: ps -p YOURPID -o lstart= the output will look like this: Mon Dec 14 17:17:16 2009 which is ctime(3) format and you can parse it to split out the relevant parts.

The start time of the process is located at /proc/PID/stat column 22. It is given in jiffies after system boot. To convert it to seconds you have to divide it by sysconf(_SC_CLK_TCK) which is 100 for most systems (but not all!). To get the time of system boot you determine the current uptime in seconds which is the first value of /proc/uptime.

Mar 8, 2024 · To find out how long a process (program or application) has been running, open a terminal and type the following command: This command lists the process ID (PID), command name, and elapsed time (etime) for all processes.

Aug 6, 2019 · One of those utilities is systemd-analyze. The systemd-analyze command gives you a detail of how many services ran at the last start up and how long they took. If you run the following command in the terminal: You’ll get the total boot time along with the time taken by firmware, boot loader, kernel and the userspace: