Questions tagged [at]
`at` is a Unix command that can be used to run other commands at a specified time.
54
questions
3
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Command scheduled with `at` fails but gives no error
I recently learned about the at command in Unix system.
Let's say I want a Python script (that might crash) to run 2 hours after I launch it. I do something like this:
$ echo python3 my_script.py | at ...
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0
votes
1
answer
262
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How do I schedule an app to launch on Linux?
How would I launch a graphical application, like firefox or gnome-calculator, at a certain time. at does not work for this; i.e. echo "firefox" | at now does not launch firefox. Cron might ...
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0
votes
1
answer
511
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What does " /bin/sh <$(tty) >$(tty) 2>$(tty) " mean?
I was looking at the GTFOBINS page for the at command and saw this command (last command in that page)
echo "/bin/sh <$(tty) >$(tty) 2>$(tty)" | sudo at now; tail -f /dev/null
for ...
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0
votes
1
answer
274
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BigSur: at: Operation not permitted
How would I fix this on macOS 11
$ at 0200
at: cannot open lockfile /usr/lib/cron/jobs/.lockfile: Operation not permitted
This started to happen after accidentally dismissing an
incessant prompt ...
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0
votes
1
answer
185
views
How to run `say` at a specified time with `at` on macOS?
Running echo "say hello" | at now+1 on macOS should enqueue a task to be executed one minute in the future: saying hello. Issuing say hello works fine, as does echo "touch a-file" |...
7
votes
1
answer
684
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MacOS - "at" command is not working
I've started the atrun daemon using the following command.
$ sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.atrun.plist
Added my username to /var/at/at.allow file.
$ cat /var/at/at....
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1
vote
1
answer
155
views
Do any linux systems depend on at (atd) for system functionality? I want to disable it
I have a cubieboard (an SBC, like a raspberry pi) that I'm using in an embedded application. While testing a box before shipping I noted unacceptable lag in the user interface. Investigation turned ...
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1
vote
1
answer
280
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scheduling job with at specifying timezone - "refusing to create job destined in the past"
I'm trying to specify a timezone for at so I can use it in a bash script and not have to worry about adjusting it twice a year, and getting this error:
at: refusing to create job destined in the past
...
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0
votes
1
answer
607
views
Ubuntu: Running a GUI application using the at command
How can I run an app showing a GUI (e.g. Chrome, Spotify etc.) at a specified time using the at command?
Just doing echo "/path/to/spotify" | at now doesn't work.
Edit: I also tried echo &...
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1
vote
1
answer
392
views
'at' command not working in arch linux
When I schedule a task using at in Arch Linux it doesn't get executed when its time to but it does get removed from the queue.
Here is an example of me scheduling a task.
at now + 2 min
warning: ...
0
votes
1
answer
237
views
notify-send Works From Shell Session, Not From Script
I am using at in coordination with notify-send/dunst as a form of reminders for myself. In an interactive bash session, doing:
$ echo 'notify-send "Test"' | at 12:45PM
works just fine and I see the ...
- 105
2
votes
2
answers
112
views
Schedule a job with at command
Hello I have written a script and I want to schedule it to run at a certain time with the at command. I also want to use an argument in order to pass the time I want in the script so it can be ...
- 31
0
votes
0
answers
99
views
DOS at command scheduling
I wanted to make a schedule that runs a (backupping) .bat program using at command on startup. If it isn't possible, then at 5 PM sunday.
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7
votes
1
answer
283
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'at' command intended behaviour? Launching each commands instead of scheduling
I'm trying to schedule the execution of some programs. I'm using this command:
./tests.o | at 15:00&
If I understood correctly, the intended behaviour was to delay execution until 15:00. However ...
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2
votes
0
answers
454
views
The 'say' command is not working with the 'at' command
I'm running macOS 10.13.5, and I want the Mac to say something, such as the current time, with the at command for the specified time.
I have already loaded the atrun daemon, and the following command ...
- 121
0
votes
1
answer
56
views
Evaluate date at "at" command scheduled time
I use a script file to run some tasks using the AT command, but in the log file the date echoed is the date when I set up AT command not the execution date.
What can I do to display the actual time ...
- 201
0
votes
1
answer
2k
views
How to run a periodic scheduled job without at or cron
Scenario: You have a user with no access to cron and need to schedule a job (say an rsync of a directory). The use of at is not an option as you don't have a fixed end date.
While I bet there are ...
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0
votes
0
answers
100
views
atd creating processes with low priority
I'm queuing up some long-running PHP processes in atd to be run at a later time.
However, when atd fires up the process for the task, it keeps creating the tasks as low priority.
I come back to find ...
- 113
8
votes
2
answers
425
views
Peek at `at` output before it completes
Let's say I run a script with at on Linux (example below) that I know is going to take several hours, or maybe even multiple days. I'm accustomed to at sending an email with the output of the command ...
- 5,900
0
votes
1
answer
932
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how to see the output of a cron/at jobs while it is still running?
The output of a cron or atq job is automatically send by email to the user, when the job is finished.
However I am running a time consuming script, and I would like to check that it is running ...
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0
votes
1
answer
258
views
Shell Script excuted fail in Linux at command
When I run a Linux "at" command,I find the user's shell script executed fail,
for example,I write the following code in my script
#!/bin/csh #or #!/bin/bash
echo "Now will excute a shell script"
...
1
vote
1
answer
63
views
Alternative `batch` command for resources rather than load
I like the at and batch commands for scheduling long running tasks I do not plan to stick around to see. But my longest running tasks share resources other than just the CPU (databases, free disk ...
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4
votes
1
answer
222
views
Does the `at` command run missed jobs?
If I use at to schedule a command and the trigger time is missed (e.g. due to an unexpected power failure), will it still execute at the earliest possible time? (e.g. once power comes back on and it ...
- 1,050
3
votes
1
answer
109
views
How to run overdue at jobs
Sometimes I have at jobs overdue after system-suspend that don't run after waking up. How can I tell atd to run them? I tried atd -s or atrun but I guess that isn't meant for this as it doesn't run ...
- 306
1
vote
0
answers
213
views
at sends a BCC to an address that doesn't exist
I'm running some pretty long tasks at work and I want to be warned when they finish, wherever I am, so I use at -m with sSMTP to get a notification on my Gmail address.
It's my first time playing ...
- 111
1
vote
1
answer
68
views
Programs for contolling the execution of bash scripts [closed]
Can anyone recommend a GUI based program to control the execution of bash scripts according to time/interval? I'm already familiar with both cron and at and looking for recommended alternatives. A ...
- 207
1
vote
2
answers
2k
views
Linux at command hangs?
I'm having a problem with the Linux 'at' command, and it's quite tough to Google 'at'..
The problem is that whatever I run, it doesn't seem to ever stop.
e.g. here is a simple script I made (I ...
0
votes
0
answers
194
views
Linux at command won't run the job in the past, lists it for tomorrow
I am trying to run a series of commands using at in about half an hour. However, at will either schedule it for tomorrow (if I don't specify today's date).
If I do specify the date, it says it won't ...
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2
votes
1
answer
675
views
Does anyone have a Windows “at /every:” example to explain how to setup a batch file to run the first sunday of every month?
This is the one I have to run first day of the month, but I need to run it the first sunday of every month.
at 13:00 /every:1 D:\DBMaintenance\MySc.bat
Thanks
newby boy
0
votes
1
answer
55
views
Run PHP at specific time - oneliner
I'm trying to run some code that sends an SMS at a specific time in the future. All on one line...
Here's my command line command:
php -r 'include_once("/home/eamorr/open/open.ie/www/newsite/ajax/...
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2
votes
1
answer
921
views
How can I start/enable `at` on MacOSX?
I just noticed that at jobs submitted in my terminal on MacOSX are never executed:
$ atq
2 Fri Feb 7 12:07:00 2014
3 Mon Feb 10 10:36:00 2014
4 Sun Mar 9 09:59:00 2014
5 Mon Mar 10 13:39:00 ...
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1
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1
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445
views
Can 'at' command keep on working after ssh connection broke?
I'm using ssh to connect to a remote server. And I execute
at 03:13Jun12 -f t.sh
would the remote host run this 't.sh' at 03:13 Jun 12 even if I broke this ssh connection? ( Assume the remote host ...
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1
vote
2
answers
244
views
User-friendly wrapper or replacement for `at` command under OS X
I often want my computer to automatically add something to my to-do list at some point in the future. In some cases I want to add the same thing at regular intervals. In these cases I use OS X's ...
- 275
3
votes
1
answer
57
views
Puzzle of atrm vs at -d
I've found some puzzle with atrm command I can't understand. The man page for at says that atrm is an alias for at -d. The file /usr/bin/atrm command says that it is a symbolic link to at.
Now if ...
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1
vote
0
answers
949
views
How can I call phones from my pc using a mobile phone connected to my pc?
I mean this question in abstract for usb/bluetooth connected featurephones and dumbphones.
But also specially for this mobile phone:
Motorola RAZR V3i
I have computers running debian and ubuntu, can ...
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1
vote
1
answer
1k
views
Windows run job by id right 'now'
Can one run a scheduled command by id 'right now' ?
I'm not sure if it is even possible on windows, Atleast I haven't found anything yet
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1
vote
2
answers
501
views
windows at command doesn't work properly
i am trying to use the at command to do a specific one time execution.
assume that i have a batch file at c:\bat.bat that contains:
%* > d:\out.txt
i also have a Java with path registered in my ...
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1
vote
1
answer
461
views
How configure email the at/batch results is sent to?
From the man page for at/batch, it says
The user will be mailed standard error and standard output from his
commands, if any. Mail will be sent using the command /usr/sbin/sendmail.
If at is ...
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2
votes
2
answers
5k
views
Windows command line "at" command to run 10 seconds from now
I want to run some command once, 10 seconds to 1 minute from now.
Windows at command only receives absolute times, like 11:50.
How can it be done? Can it be done with other command line means?
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2
votes
3
answers
2k
views
Unix "at" command: I don't want it saving output to /var/mail/
By default (and from what I've looked at thus far), at dumps the standard terminal text output to /var/mail/yourusername. (e.g. echo "hello" | at now + 1 minute will save a log about the command) Is ...
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0
votes
1
answer
2k
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Sending sms with at commands, what kind of caracters i can't have in my message?
I need to know what kind of characters I can't put in my message, how to format it and if I can put spaces at the end of message. If some knows some about it, some bug, some hit, please tell me.
1
vote
2
answers
1k
views
cron and at are not working
On my Mac (yeah, yeah I know. but my Linux box is at work) for some reason cron and at don't want to work. They both register that jobs have been added, with no syntax errors or any qualms at all. ...
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3
votes
1
answer
2k
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Have the at command return the job id of the task just submitted
Is it possible to have the at command return somehow the job id it just submitted when used from within a script? (kind of like $? retrieves the last exit code or $$/$! retrieve the PID of the command ...
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3
votes
1
answer
196
views
How can at execute a command from the command line
How can I schedule a command using at without having to include the command in a distinct file, neither from the mini at shell that reads from standard input?
That is, I want to execute the command:
...
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2
votes
1
answer
221
views
'at' command output on Mac
I need to execute scheduled tasks with at command:
echo "VM-run.sh $1" | at 08.00 > at_output.txt 2>&1
I would have the output of VM-run.sh, but what I have instead is this output:
job 5 ...
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2
votes
1
answer
1k
views
Easy quick notifications on Windows 7 with UAC
On Windows XP I was used to create simple notifications for myself using combination of at and msg commands. The whole thing was very easy
hit Ctrl+R
type eg. at 21:00 msg * Do something
hit ...
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1
vote
1
answer
1k
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Getting zenity and at to work properly
I'm trying to use zenity and at to make a little reminder script. The problem is that while zenity --info works fine from bash (or sh), running echo "zenity --info" | at now + 1 min does nothing. ...
- 335
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vote
0
answers
121
views
script -e and crontab or at
I have a shellscript I want to run via at and use script to capture a transcript. script -e was introduced in util-linux-ng 2.18 and returns the retval of the child process.
I want to capture the ...
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5
votes
2
answers
5k
views
Linux at command with seconds precision
I'm looking for some Linux command which may launch another command at a specific time.
I know about the at command, but it gives me only minutes precision, and I need seconds precision. Is there an ...
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0
votes
1
answer
2k
views
Trace AT commands to a modem
I have a HSDPA modem attached to the USB port and I use the software that came bundled up with this modem to connect to the Internet. Can I trace the AT commands issued to this modem using a packet ...
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