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Software · Utilities & files

Concessio

Understand file permissions.

  • Completely free
  • Linux
  • Open source

At a glance

All of Concessio is free: no feature is locked behind a paid plan, and its code is open.

Its licence (GPL-3.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

  • Open source code
  • Commercial use allowed

About

Concessio helps you understand and convert between unix permissions representations Convert between symbolic and numeric representations of UNIX file permissions Use toggle buttons to update the symbolic and numeric fields Open a file to read it's permissions and convert them Calculate umask values and see the resulting permissions for new files and directories Open the help dialog to read and understand the UNIX permissions system

Description from Flathub — AppStream (Flathub)

Sources and checks

  • Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) —
  • Last technical check: 7 November 2026
  • Description from Flathub — AppStream (Flathub)

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