man > proc_uptime(5)

proc_uptime(5)                           File Formats Manual                          proc_uptime(5)

NAME
       /proc/uptime - system uptime

DESCRIPTION
       /proc/uptime
              This  file contains two numbers (values in seconds): the uptime of the system (includ‐
              ing time spent in suspend) and the amount of time spent in the idle process.

SEE ALSO
       proc(5)

Linux man-pages 6.7                          2023-08-15                               proc_uptime(5)