Provided by: manpages_6.7-2_all 

NAME
/proc/uptime - system uptime
DESCRIPTION
/proc/uptime This file contains two numbers (values in seconds): the uptime of the system (including 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)