Hello,
I would like to schedule a command at a specific time on my system.I know that theres a file named at.alow and at.deny in my system. I can find the at.deny file but not an at.allow file .
Is there anyway out or i have to go and talk to the system administrator itself , or any other way of... (1 Reply)
i have tried to schedule my process at a certain time using the at command :
the error says bad time specification
can somebody help me
i used at 2300 job
thanks (2 Replies)
Hi,
I need to write script which will read a value from XML file and schedule crontab accordingly.
I have an XML file which has a key value structure where the entries is:
<Param Name="executionInterval" Value="600" />
600 means that the crontab should be scheduled to run every 600 sec.
... (0 Replies)
Hi,
How can we run/schedule a shell script. Since there is no access to cron at this point of time we have to think other way out to run a script every hour.
How can we achieve this. Need advice.
How about using sleep,autosys etc...the script should trigger off every hour...which sends... (3 Replies)
Hi Everybody,
How to schedule a job using cron that shouldn't run between working hrs 9am-5pm, while run in non working hrs every hour, every day of the month, month & week.
I tried the following way, not sure I can use logical not operator(!). Please correct me if wrong or suggest other... (2 Replies)
Hi,
I need to schedule a script in crontab which should run at 01:00 am in the morning and should run for every 15 days in a month.
How to schedule this by using crontab?
Many thanks.
Rgds, (13 Replies)
Hi,
i have 10 sh scripts. All are running in parallel using cron tab and each script gives "success" flag files once the execution is completed.
and, now i have 11th script which should look for "success" flag from those 10 sh scripts. once all the 10 flag files found, 11 th script has to do... (9 Replies)
Hi,
We can schedule a new job using crontab -e.
is there any other way to achieve the same(opening the file directly and add an entry).
I have tried to access /var/spool/crontabs directory. But i am getting permission denied error,
Please help me. Thanks (8 Replies)
Hi All,
I am new to unix and i have a task in front of me.
The code part is "android update sdk" . I need to crontab this process.
Hence i have written a script that runs the above command and sends a mail once the update is done. The problem with the automation is the installer asks for a... (5 Replies)
Discussion started by: Kashyap
5 Replies
LEARN ABOUT BSD
at
AT(1) General Commands Manual AT(1)NAME
at - execute commands at a later time
SYNOPSIS
at [ -c ] [ -s ] [ -m ] time [ day ] [ file ]
DESCRIPTION
At spools away a copy of the named file to be used as input to sh(1) or csh(1). If the -c flag (for (csh(1))) or the -s flag (for (sh(1)))
is specified, then that shell will be used to execute the job; if no shell is specified, the current environment shell is used. If no file
name is specified, at prompts for commands from standard input until a ^D is typed.
If the -m flag is specified, mail will be sent to the user after the job has been run. If errors occur during execution of the job, then a
copy of the error diagnostics will be sent to the user. If no errors occur, then a short message is sent informing the user that no errors
occurred.
The format of the spool file is as follows: A four line header that includes the owner of the job, the name of the job, the shell used to
run the job, and whether mail will be set after the job is executed. The header is followed by a cd command to the current directory and a
umask command to set the modes on any files created by the job. Then at copies all relevant environment variables to the spool file. When
the script is run, it uses the user and group ID of the creator of the spool file.
The time is 1 to 4 digits, with an optional following `A', `P', `N' or `M' for AM, PM, noon or midnight. One and two digit numbers are
taken to be hours, three and four digits to be hours and minutes. If no letters follow the digits, a 24 hour clock time is understood.
The optional day is either (1) a month name followed by a day number, or (2) a day of the week; if the word `week' follows, invocation is
moved seven days further off. Names of months and days may be recognizably truncated. Examples of legitimate commands are
at 8am jan 24
at -c -m 1530 fr week
at -s -m 1200n week
At programs are executed by periodic execution of the command /usr/libexec/atrun from cron(8). The granularity of at depends upon the how
often atrun is executed.
Error output is lost unless redirected or the -m flag is requested, in which case a copy of the errors is sent to the user via mail(1).
FILES
/usr/spool/at spooling area
/usr/spool/at/yy.ddd.hhhh.* job file
/usr/spool/at/past directory where jobs are executed from
/usr/spool/at/lasttimedone last time atrun was run
/usr/libexec/atrun executor (run by cron(8))
SEE ALSO atq(1), atrm(1), calendar(1), sleep(1), cron(8)DIAGNOSTICS
Complains about various syntax errors and times out of range.
BUGS
Due to the granularity of the execution of /usr/libexec/atrun, there may be bugs in scheduling things almost exactly 24 hours into the
future.
If the system crashes, mail is not sent to the user informing them that the job was not completed.
Sometimes old spool files are not removed from the directory /usr/spool/at/past. This is usually due to a system crash, and requires that
they be removed by hand.
4th Berkeley Distribution October 21, 1996 AT(1)