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at

file managementLinux/Unix
The at command is one of the most frequently used commands in Linux/Unix-like operating systems. at Sample fallback description for at
See ExamplesView Syntax

Quick Reference

Command Name:

at

Category:

file management

Platform:

Linux/Unix

Basic Usage:

at [options] [arguments]

Common Use Cases

  • 1

    One-time task scheduling

    Schedule commands to run once at a specific time

  • 2

    Delayed execution

    Execute commands after a specified delay

  • 3

    System maintenance

    Schedule maintenance tasks during off-peak hours

  • 4

    Batch processing

    Queue multiple jobs for execution at specific times

Syntax

at [OPTION]... [FILE]...

Options

Option Description
-l Use a long listing format
-a Show hidden entries starting with .
-h Human-readable sizes
-R List subdirectories recursively

Examples

How to Use These Examples

The examples below show common ways to use the at command. Try them in your terminal to see the results. You can copy any example by clicking on the code block.

Basic Examples:

ls
List files in the current directory.
ls -l
List files in long format with details.
ls -a
List all files including hidden ones.

Advanced Examples:

ls -lah Detailed list with human-readable sizes. ls -R List directories recursively.

Try It Yourself

Practice makes perfect! The best way to learn is by trying these examples on your own system with real files.

Understanding Syntax

Pay attention to the syntax coloring: commands, options, and file paths are highlighted differently.

Notes

These are sample notes for the at command.

Common Use Cases

One-time task scheduling

Schedule commands to run once at a specific time

Delayed execution

Execute commands after a specified delay

System maintenance

Schedule maintenance tasks during off-peak hours

Batch processing

Queue multiple jobs for execution at specific times

Automated workflows

Create automated sequences of commands

Related Commands

These commands are frequently used alongside at or serve similar purposes:

atq
atrm
batch
cron
crontab
anacron
systemd-run
sleep
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Use Cases

1

One-time task scheduling

Schedule commands to run once at a specific time

2

Delayed execution

Execute commands after a specified delay

3

System maintenance

Schedule maintenance tasks during off-peak hours

4

Batch processing

Queue multiple jobs for execution at specific times

5

Automated workflows

Create automated sequences of commands

Learn By Doing

The best way to learn Linux commands is by practicing. Try out these examples in your terminal to build muscle memory and understand how the at command works in different scenarios.

See ExamplesTry Lab Exercises
$ at
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at - Linux Command Guide | LinuxConcept