03-06-2019
>> On UNIX and UNIX-like systems, you can think of a foreground job as one that is connected to a keyboard and a background job is one that is not connected to a keyboard at that time. <<
Thank you; that explains it perfectly.
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TM(1) General Commands Manual TM(1)
NAME
tm - meditate
SYNOPSIS
tm [-number] [time]
DESCRIPTION
Tm causes UNIX to go into a state in which all current activities are suspended for time minutes (default is 20). At the beginning of this
period, tm generates a set of number (default 3) transcendental numbers. Then it prints a two- to six-character nonsense syllable (mantra)
on every logged-in terminal (a different syllable on each terminal). For the remainder of the time interval, it repeats these numbers to
itself, in random order, binary digit by binary digit (memory permitting), while simultaneously contemplating its kernel.
It is suggested that users utilize the time thus provided to do some meditating themselves. One possibility is to close one's eyes,
attempt to shut out one's surroundings, and concentrate on the mantra supplied by tm.
At the end of the time interval, UNIX returns to the suspended activities, refreshed and reinvigorated. Hopefully, so do the users.
FILES
Tm does not use any files, in an attempt to isolate itself from external influences and distractions.
DIAGNOSTICS
If disturbed for any reason during the interval of meditation, tm locks the keyboard on every terminal, prints an unprintable expletive,
and unlocks the keyboard. Subsequent UNIX operation may be marked by an unusual number of lost or scrambled files and dropped lines.
BUGS
If number is greater than 32,767 (decimal), tm appears to generate rational numbers for the entire time interval, after which the behavior
of the system may be completely irrational (i.e., transcendental).
WARNING
Attempts to use flog(1) on tm are invariably counterproductive.
TM(1)