Debian系统中at/atd命令使用问题：无法找到对应包或路径

Hey there! Let's get your task scheduling with at/atd working on your Debian 8 system. Based on your kernel info, you're running Debian 8 (Jessie), so here's the step-by-step fix:

• Install the required package
  The at command and atd daemon are both included in the at package, which isn't installed by default on some Debian setups. Run these commands to install it:

  sudo apt-get update && sudo apt-get install at
  

• Start and enable the atd daemon
  After installation, you need to make sure the atd service is running so scheduled tasks get executed. For Debian 8 (which uses systemd by default):

  sudo systemctl start atd
  sudo systemctl enable atd
  

  If you're using the old SysV init system instead, use these commands:

  sudo service atd start
  sudo update-rc.d atd defaults
  

• Verify everything works
  Check if at is now available by running:

  which at
  

  You should see output like /usr/bin/at. You can also test scheduling a quick task to confirm, for example:

  echo "echo 'Test task ran!' >> ~/at_test.txt" | at now +1 minute
  

  Wait a minute, then check the at_test.txt file in your home directory to see if the task executed.

内容的提问来源于stack exchange，提问作者Jbertrand