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111 lines
3.1 KiB
Text
111 lines
3.1 KiB
Text
---
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title: About the crontab Resource
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platform: linux
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---
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# crontab
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Use the `crontab` InSpec audit resource to test the crontab entries for a particular user on the system. It recognizes special time strings (@yearly, @weekly, etc).
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<br>
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## Availability
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### Installation
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This resource is distributed along with InSpec itself. You can use it automatically.
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### Version
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This resource first became available in v1.15.0 of InSpec.
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## Syntax
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A `crontab` resource block declares a user (which defaults to the current user, if not specified), and then the details to be tested, such as the schedule elements for each crontab entry or the commands itself:
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describe crontab do
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its('commands') { should include '/some/scheduled/task.sh' }
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end
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The path to the system crontab can also be supplied via:
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describe crontab(path: '/etc/cron.d/some_crontab') do
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its('commands') { should include '/path/to/some/script' }
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end
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Note that only the path or the user (and not both) should be supplied as arguments to the resource.
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<br>
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## Examples
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The following examples show how to use this InSpec audit resource.
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### Test that root's crontab has a particular command
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describe crontab('root') do
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its('commands') { should include '/path/to/some/script' }
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end
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### Test that myuser's crontab entry for command '/home/myuser/build.sh' runs every minute
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describe crontab('myuser').commands('/home/myuser/build.sh') do
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its('hours') { should cmp '*' }
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its('minutes') { should cmp '*' }
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end
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### Test that the logged-in user's crontab has no tasks set to run on every hour and every minute
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```ruby
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describe crontab.where({'hour' => '*', 'minute' => '*'}) do
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its('entries.length') { should cmp '0' }
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end
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```
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### Test that the logged-in user's crontab contains a single command that matches a pattern
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```ruby
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describe crontab.where { command =~ /a partial command string/ } do
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its('entries.length') { should cmp 1 }
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end
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```
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### Test a special time string (i.e., @yearly /root/annual_report.sh)
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describe crontab.commands('/root/annual_report.sh') do
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its('hours') { should cmp '0' }
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its('minutes') { should cmp '0' }
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its('days') { should cmp '1' }
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its('months') { should cmp '1' }
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end
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### Test @reboot case
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describe crontab.commands('/root/reboot.sh') do
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its('hours') { should cmp '-1' }
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its('minutes') { should cmp '-1' }
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end
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<br>
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## Property Examples
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### Test a special time string
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describe crontab do
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its('minutes') { should cmp '0' }
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its('hours') { should cmp '0' }
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its('days') { should cmp '1' }
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its('weekdays') { should cmp '1' }
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its('user') { should include 'username'}
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its('commands') { should include '/some/scheduled/task.sh' }
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end
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InSpec will automatically interpret crontab-supported special time strings. For example, a crontab entry set to run `@yearly` can be tested as if the entry was manually configured to run on January 1, 12 AM.
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<br>
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## Matchers
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For a full list of available matchers, please visit our [matchers page](https://www.inspec.io/docs/reference/matchers/).
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