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Home / Glossary / SE Linux
Glossary · Security

SE Linux

Security-enhanced Linux

In plain language

An extra safety layer in Linux that limits what each program is allowed to do.

The metaphor

Like a rule book that gives each worker keys only to the rooms their job needs.

Going deeper

How it works

  • It sets rules for programs, files and users.
  • A hacked program can only do what its rule permits.
  • It is built into many Linux systems.
  • Turning it off is a common shortcut that weakens security.
In practice
  • A web server is limited to its own folder.
  • An administrator reads a log to see what was blocked.
  • A technician changes a rule to let a new program run.

A question owners ask

Should it be on?

Yes where it exists. Ask your provider whether it is turned on.

Related terms
AAAAuthentication, Authorization, and AccountingAccount takeoverACLAccess Control ListAdmin accountAESAdvanced Encryption StandardAES-256Advanced Encryption Standards 256-bitAISAutomated Indicator SharingAPTAdvanced Persistent Threat

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