Scheduling jobs with the AT command

By Bryan Muehlberger, ITworld |  How-to

In my day-to-day job of managing a large number of servers, quite often
I run into a situation where I must schedule a job to run on a remote
server. By using the AT command, I can simply setup my scheduled job
and be on my way.

The syntax for the AT command is:

AT [\\computername] [ [id] [/DELETE] | /DELETE [/YES]]
AT [\\computername] time [/INTERACTIVE]
[ /EVERY:date[,...] | /NEXT:date[,...]] "command"

\\computername
Specifies a remote computer. Commands are scheduled on the local
computer if this parameter is omitted.

Id
Is an identification number assigned to a scheduled command.

/delete
Cancels a scheduled command. If id is omitted, all the scheduled
commands on the computer are canceled.

/yes
Used with cancel all jobs command when no further confirmation is
desired.

Time
Specifies the time when command is to run.

/interactive
Allows the job to interact with the desktop of the user who is logged on
at the time the job runs.

/every:date[,...]
Runs the command on each specified day(s) of the week or month. If date
is omitted, the current day of the month is assumed.

/next:date[,...]
Runs the specified command on the next occurrence of the day (for
example, next Thursday). If date is omitted, the current day of the
month is assumed.

"command"
Is the Windows NT command, or batch program to be run.

Most of the options that are available to the AT command are
self-explanatory, however, there are a couple of options that need some
explanation.

First, to see the jobs that have been successfully scheduled with the AT
command, all you need to do is type 'AT' at the command prompt.

Now let's look at some of the options that need further explanation.

The 'time' option is based upon the 24-hour clock, not the 12-hour
clock. This means that if you want something to run at 8:00PM, then you
need to specify time as 20:00.

For the 'date' portion of the '/every' and '/next' options, you need to
use the following abbreviations for the days of the week:

M,T,W,Th,F,S,Su

Last, the 'command' option, which is the most important, has a few
caveats. First, if there are spaces in the command path, you need to
make sure that the command is surrounded by double quotes. If the
command is a local path on the remote machine, you need to include the
absolute path name, including the drive letter. Additionally, if the
command is being run from another machine, then you must use the UNC
path name in the form \\server\sharename. Last, if the command is not
an executable (i.e. a batch file or VBScript), then you must precede the
command with "cmd /c". For example, let's assume that I want the target
server called 'serverName' to run a batch file on the C-drive called
test.bat every Monday at 8PM.

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