'at' reads commands from standard input or a specified file which is to be executed at a later time, using /bin/sh.
Questions tagged [at-command]
19 questions
7
votes
2 answers
How to send a notification using at command?
I have a bash script that runs periodically once a day using crontab.
The script checks a condition, and if true, it should issue an at command at a specific time.
at 14:10
The question is: how can I add a specific command like…
membersound
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5
votes
2 answers
`at` command: what is the meaning of the option `-w`?
I have a script that uses at command. And sometimes I receiving emails as this one:
Date: Mon, 3 Jul 2017 14:18:00 +0300 (EEST)
From: root
To: root@localhost.org
Subject: Output from your job 173
Another app is currently…
pa4080
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4
votes
1 answer
How to change the default shell of at command
when I want to delay the execution of a program using at, it precise me that
warning: commands will be executed using /bin/sh
How the change this default shell, to bash for instance ?
Covich
- 233
- 1
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4
votes
1 answer
Why my 'at' clause command execute the shell immediately and ignored the time limit?
I wrote a shell named t.sh It's content is:
touch 88888
The command I'm using is
sh t.sh | at 03:13Jun15
After I execute this command, I got this show on my screen:
warning: commands will be executed using /bin/sh
job 9 at Sun Jun 15 03:13:00…
Zen
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3
votes
4 answers
How to make my Ubuntu 16.04 system display a to-do reminder?
Sometimes I get interrupted while programming and would like to have some sort of alarm function that can remind me to do sometihing important.
I do not want to build a clock, nor do I want the kind of thing my smartphone does.
Just an on-screen…
SDsolar
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3
votes
2 answers
Why can't I use bash freely after using the "At" utility? (Can't insert stdin until ctrl+c)
I ran the following code block (an at timeout to uninstall PHPmyadmin). It should be scheduled to run 2 horus ahead, but I ran it in a timeout of 2 minutes, just to test it:
bash /dev/fd/50 50<< PMA_UNINSTALL | at 'now + 2 minutes'
apt-get purge…
user423047
3
votes
1 answer
at command in ubuntu error 'You do not have permission to use at'
Apologize in advance, I am pretty new at php and ubuntu. I have 2 servers set up, one for development and one for staging. On the dev machine I can use the at command without a problem, but on staging I get a permissions error. The at.deny (and…
fredjo
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3
votes
1 answer
Understanding the at-command to schedule another command
I use cron to schedule things in Linux, but recently I discovered the "at" command.
sudo apt-get install at
I don't understand the scope from which this command operates:
How would you schedule a command with at, that normally requires
admin…
Lonnie Best
- 2,174
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0
votes
1 answer
See the output of a scheduled task in the terminal
Is it possible to see the outputs of tasks, that are schedule with "at" in real-time? Say, I want to see the values of my loss function as I train my network.
Alderson
- 103
- 2
0
votes
2 answers
CTRL+C doesn't help qutting "at" utility prompt. How to safely quit?
I ran the following code and when I reached the second heredoc I became stuck in an at prompt (see image below). How to safely quite from this (without braking anything)?
The code:
bash /dev/fd/40 40<< 'PMA'
cat << PMA_UNINSTALL | at 'now + 2…
user423047
0
votes
2 answers
appends n-th line from the file x at the end of the file y
I have been asked to write a command that appends the n-th line (MYN) from a file (x)to another file (y). Here's what I've done so far:
MYN=4
hey=$(awk 'NR==$MYN' x)
echo "$hey" >> y
But why doesn't this work?
Martin Yeboah
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0
votes
0 answers
How do I view the history of at commands executed? Can I view the outputs of those commands as well?
The at commands accepts commands to be executed at a later time. I want to know if there is a way to know the history of what commands were executed by at. Also, would it be possible to get the outputs of those commands?
Bhavesh Neekhra
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- 2
0
votes
1 answer
"At" Command on WSL (Ubuntu 20.04)
I am using WSL (ubuntu 20.04) on my machine. Today I learned about the at command, which can be used for scheduling jobs. I attempted to use it on WSL but the job was not fired although its time came.
Can't we use this command on WSL?
If we can,…
mustafabaki
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- 5
0
votes
1 answer
How can I run a at command with existing environmental variables and libs?
Almost a duplicate question of this one, however, the answer in that post does not solve the environmental issue with at command.
Problem description:
I want to run my shell scripts with at command as a scheduled job. All my shell scripts run…
Albert G Lieu
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0
votes
1 answer
Running pwd command by using at - at doesn't do anything
I'm trying to learn how to use the at command and to do that I tried to run the pwd command, but it seems that nothing happens:
How can I run a command like pwd by using at?
Gennaro Arguzzi
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