unix command for time-shifting any tasks that you want to automate. 'at' can run commands in a file (with -f) through standard input (through a pipe, or via redirection).

The way you pronounce the '@' symbol.

Funny to watch most newbies struggle over what to call it. "That funky a with the circle around it."

The smaller monetary unit of Laos. It is one hundredth of a kip.

The "currencyist" account does not want to collect XP; please don't waste a downvote.

at [-V] [-q queue] [-f file] [-mldbv] TIME

The unix at command is used to schedule jobs for later execution. at either takes the commands to be executed from the standard input, stopping when it encounters end of file (entered manually by typing control-d), or from the file specified after the -f option.

at takes a time specification in the 24 hour HH:MM form, the 12 hour time folowed by AM or PM, or midnight, noon or teatime(4:00 PM); if you do not provide the date it is assumed that you mean the next occorance of the specified time (today is assumed unless the time has past in which case tomorow is assumed).

If you do not wish the next occorance of the specified time the date can be given to at. If you want the job to run today (or not run if the time specified has past) you can specify today; tomorow can also be used if you want the job to run tomorow. The date can be specified in the form 'month-name day' with an optional year, MMDDYY, MM/DD/YY, DD.MM.YY. The date specification must always follow the time specification.

You can also give a time in the form now + n[hours minutes days weeks]

The user who invokes the at command is mailed the standard output and standard error using /usr/sbin/sendmail.

Weather or not a user can invoke the at command is specified by the existance of their username in the files /etc/at.allow and /etc/at.deny. If /etc/at.allow existes than no user who is not specified in the file can invoke the at command, otherwise if the file /etc/at.deny exists then any user not specified in the /etc/at.deny file can invoke at. If neither of the files exist then only the superuser can use the at command. An empty /etc/at.deny means that every user is allowed use these commands in general, this is the default configuration.

At (#), prep. [AS. aet; akin to OHG. az, Goth., OS., & Icel. at, Sw. �x86;t, Dan. & L. ad.]

Primarily, this word expresses the relations of presence, nearness in place or time, or direction toward; as, at the ninth hour; at the house; to aim at a mark. It is less definite than in or on; at the house may be in or near the house. From this original import are derived all the various uses of at.

It expresses: -


A relation of proximity to, or of presence in or on, something; as, at the door; at your shop; at home; at school; at hand; at sea and on land.


The relation of some state or condition; as, at war; at peace; at ease; at your service; at fault; at liberty; at risk; at disadvantage.


The relation of some employment or action; occupied with; as, at engraving; at husbandry; at play; at work; at meat (eating); except at puns.


The relation of a point or position in a series, or of degree, rate, or value; as, with the thermometer at 80°; goods sold at a cheap price; a country estimated at 10,000 square miles; life is short at the longest.


The relations of time, age, or order; as, at ten o'clock; at twenty-one; at once; at first.


The relations of source, occasion, reason, consequence, or effect; as, at the sight; at this news; merry at anything; at this declaration; at his command; to demand, require, receive, deserve, endure at your hands.


Relation of direction toward an object or end; as, look at it; to point at one; to aim at a mark; to throw, strike, shoot, wink, mock, laugh at any one.

At all, At home, At large, At last, At length, At once, etc. See under All, Home, Large, Last (phrase and syn.), Length, Once, etc. -- At it, busily or actively engaged. -- At least. See Least and However. -- At one. See At one, in the Vocabulary.

Syn. -- In, At. When reference to the interior of any place is made prominent in is used. It is used before the names of countries and cities (esp. large cities); as, we live in America, in New York, in the South. At is commonly employed before names of houses, institutions, villages, and small places; as, Milton was educated at Christ's College; money taken in at the Customhouse; I saw him at the jeweler's; we live at Beachville. At may be used before the name of a city when it is regarded as a mere point of locality. "An English king was crowned at Paris." Macaulay. "Jean Jacques Rousseau was born at Geneva, June, 28, 1712." J. Morley. In regard to time, we say at the hour, on the day, in the year; as, at 9 o'clock, on the morning of July 5th, in the year 1775.


© Webster 1913.

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