Perbedaan antara menunggu dan tidur

Apa perbedaan antara waitdan sleep?

waitmenunggu proses selesai; sleeptidur selama beberapa detik.

wait adalah perintah bawaan BASH. Dari man bash:

    wait [n ...]
        Wait  for each specified process and return its termination sta-
        tus.  Each n may be a process ID or a job  specification;  if  a
        job  spec  is  given,  all  processes in that job's pipeline are
        waited for.  If n is not given, all currently active child  pro-
        cesses  are  waited  for,  and  the return status is zero.  If n
        specifies a non-existent process or job, the  return  status  is
        127.   Otherwise,  the  return  status is the exit status of the
        last process or job waited for.

sleep bukanlah perintah bawaan shell. Ini adalah utilitas yang menunda untuk waktu tertentu.

The sleepperintah dapat mendukung menunggu di berbagai satuan waktu. GNU coreutils 8.4 man sleepmengatakan:

    SYNOPSIS
        sleep NUMBER[SUFFIX]...

    DESCRIPTION
        Pause for NUMBER seconds.  SUFFIX may be ‘s’ for seconds (the default),
        ‘m’ for minutes, ‘h’ for hours or ‘d’ for days.  Unlike most  implemen-
        tations  that require NUMBER be an integer, here NUMBER may be an arbi-
        trary floating point number.  Given two or more  arguments,  pause  for
        the amount of time specified by the sum of their values.

sleep hanya menunda shell untuk jumlah detik yang diberikan.

waitmembuat shell menunggu pekerjaan yang diberikan. misalnya:

workhard &
[1] 27408
workharder &
[2] 27409
wait %1 %2

menunda shell sampai kedua subproses selesai