sleep(5) - phpMan
clock_nanosleep (2) - high-resolution sleep with specifiable clock clock_nanosleep (3p) - high resolution sleep with specifiable clock nanosleep (2) - high-resolution sleep nanosleep (3p) - high resolution sleep rtcwake (8) - enter a system sleep state until specified wakeup time sleep (1) - delay for a specified amount of time sleep (1p) - suspend execution for an interval sleep (3) - sleep for a specified number of seconds sleep (3p) - suspend execution for an interval of time sleep.conf.d (5) - Suspend and hibernation configuration file systemd-hibernate.service (8) - System sleep state logic systemd-hybrid-sleep.service (8) - System sleep state logic systemd-sleep (8) - System sleep state logic systemd-sleep.conf (5) - Suspend and hibernation configuration file systemd-suspend-then-hibernate.service (8) - System sleep state logic systemd-suspend.service (8) - System sleep state logic Time::HiRes (3pm) - High resolution alarm, sleep, gettimeofday, interval t... usleep (1) - sleep some number of microseconds usleep (3) - suspend execution for microsecond intervals