at

Run a job for a specific time.

AT(1) BSD General Commands Manual

NAME
     at, batch, atq, atrm -- queue, examine, or delete jobs for later execution

github

  • The jupyter notebook format file on github is here.

google colaboratory

  • To run it in google colaboratory here at_nb.ipynb)

Environment

The author’s OS is macOS, and the options are different from those of Linux and Unix commands.

When you actually run the command, you should not use the leading ! and %%bash in the first line.

!sw_vers

ProductName: Mac OS X
ProductVersion: 10.14.6
BuildVersion: 18G95

!bash --version

GNU bash, version 3.2.57(1)-release (x86_64-apple-darwin18)
Copyright (C) 2007 Free Software Foundation, Inc.

Example usage

Usually, I use the -f and -t options.

Prepare a bash file like the following.

%%bash

cat << 'EOF' > temp.sh
#! /bin/bash

echo `date +%Y%m%d

EOF

chmod +x temp.sh

! ls -al

total 32
drwxr-xr-x 7 hiroshi staff 224 7 8 17:26 [34m.[m[m
drwxr-xr-x 25 hiroshi staff 800 7 8 17:13 [34m. [m[m
drwxr-xr-x 3 hiroshi staff 96 7 8 17:14 [34m.ipynb_checkpoints[m[m
-rw-r--r-- 1 hiroshi staff 4094 7 8 17:26 at_nb.ipynb
-rw-r--r-- 1 hiroshi staff 2005 7 8 17:26 at_nb.md
-rw-r--r-- 1 hiroshi staff 1469 7 8 17:26 at_nb.py
-rwxr-xr-x 1 hiroshi staff 34 7 8 17:26 [31mtemp.sh[m[m

! /temp.sh

20200708

To make this file run at 18:00 on July 8, 2020, run the following command. This can be used like a timer, so if you want to use it temporarily, it is easier than setting CRON.

%%bash
at -f temp.sh.sh -t 202007081800

Typical options

  • f : specifies a file
  • t : Defines the time format (YYYYmmddHHMM)