FreeBSD Handbook
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# A.7 CVS Tags

When obtaining or updating sources using cvs or CVSup, a revision tag must be specified. A revision tag refers to either a particular line of FreeBSD development, or a specific point in time. The first type are called branch tags, and the second type are called release tags.

## A.7.1 Branch Tags

All of these, with the exception of `HEAD` (which is always a valid tag), only apply to the `src/` tree. The `ports/`, `doc/`, and `www/` trees are not branched.

HEAD

  Symbolic name for the main line, or FreeBSD-CURRENT. Also the default when no revision is specified.

  In CVSup, this tag is represented by a `.` (not punctuation, but a literal `.` character).

  > Note: In CVS, this is the default when no revision tag is specified. It is usually not a good idea to checkout or update to CURRENT sources on a STABLE machine, unless that is your intent.

RELENG_9

  The line of development for FreeBSD-9.X, also known as FreeBSD 9-STABLE

RELENG_9_0

  The release branch for FreeBSD-9.0, used only for security advisories and other critical fixes.

RELENG_8

  The line of development for FreeBSD-8.X, also known as FreeBSD 8-STABLE

RELENG_8_2

  The release branch for FreeBSD-8.2, used only for security advisories and other critical fixes.

RELENG_8_1

  The release branch for FreeBSD-8.1, used only for security advisories and other critical fixes.

RELENG_8_0

  The release branch for FreeBSD-8.0, used only for security advisories and other critical fixes.

RELENG_7

  The line of development for FreeBSD-7.X, also known as FreeBSD 7-STABLE

RELENG_7_4

  The release branch for FreeBSD-7.4, used only for security advisories and other critical fixes.

RELENG_7_3

  The release branch for FreeBSD-7.3, used only for security advisories and other critical fixes.

RELENG_7_2

  The release branch for FreeBSD-7.2, used only for security advisories and other critical fixes.

RELENG_7_1

  The release branch for FreeBSD-7.1, used only for security advisories and other critical fixes.

RELENG_7_0

  The release branch for FreeBSD-7.0, used only for security advisories and other critical fixes.

RELENG_6

  The line of development for FreeBSD-6.X, also known as FreeBSD 6-STABLE

RELENG_6_4

  The release branch for FreeBSD-6.4, used only for security advisories and other critical fixes.

RELENG_6_3

  The release branch for FreeBSD-6.3, used only for security advisories and other critical fixes.

RELENG_6_2

  The release branch for FreeBSD-6.2, used only for security advisories and other critical fixes.

RELENG_6_1

  The release branch for FreeBSD-6.1, used only for security advisories and other critical fixes.

RELENG_6_0

  The release branch for FreeBSD-6.0, used only for security advisories and other critical fixes.

RELENG_5

  The line of development for FreeBSD-5.X, also known as FreeBSD 5-STABLE.

RELENG_5_5

  The release branch for FreeBSD-5.5, used only for security advisories and other critical fixes.

RELENG_5_4

  The release branch for FreeBSD-5.4, used only for security advisories and other critical fixes.

RELENG_5_3

  The release branch for FreeBSD-5.3, used only for security advisories and other critical fixes.

RELENG_5_2

  The release branch for FreeBSD-5.2 and FreeBSD-5.2.1, used only for security advisories and other critical fixes.

RELENG_5_1

  The release branch for FreeBSD-5.1, used only for security advisories and other critical fixes.

RELENG_5_0

  The release branch for FreeBSD-5.0, used only for security advisories and other critical fixes.

RELENG_4

  The line of development for FreeBSD-4.X, also known as FreeBSD 4-STABLE.

RELENG_4_11

  The release branch for FreeBSD-4.11, used only for security advisories and other critical fixes.

RELENG_4_10

  The release branch for FreeBSD-4.10, used only for security advisories and other critical fixes.

RELENG_4_9

  The release branch for FreeBSD-4.9, used only for security advisories and other critical fixes.

RELENG_4_8

  The release branch for FreeBSD-4.8, used only for security advisories and other critical fixes.

RELENG_4_7

  The release branch for FreeBSD-4.7, used only for security advisories and other critical fixes.

RELENG_4_6

  The release branch for FreeBSD-4.6 and FreeBSD-4.6.2, used only for security advisories and other critical fixes.

RELENG_4_5

  The release branch for FreeBSD-4.5, used only for security advisories and other critical fixes.

RELENG_4_4

  The release branch for FreeBSD-4.4, used only for security advisories and other critical fixes.

RELENG_4_3

  The release branch for FreeBSD-4.3, used only for security advisories and other critical fixes.

RELENG_3

  The line of development for FreeBSD-3.X, also known as 3.X-STABLE.

RELENG_2_2

  The line of development for FreeBSD-2.2.X, also known as 2.2-STABLE. This branch is mostly obsolete.

## A.7.2 Release Tags

These tags refer to a specific point in time when a particular version of FreeBSD was released. The release engineering process is documented in more detail by the Release Engineering Information and Release Process documents. The `src` tree uses tag names that start with `RELENG_` tags. The `ports` and `doc` trees use tags whose names begin with `RELEASE` tags. Finally, the `www` tree is not tagged with any special name for releases.

RELENG_9_0_0_RELEASE

  FreeBSD 9.0

RELENG_8_3_0_RELEASE

  FreeBSD 8.3

RELENG_8_2_0_RELEASE

  FreeBSD 8.2

RELENG_8_1_0_RELEASE

  FreeBSD 8.1

RELENG_8_0_0_RELEASE

  FreeBSD 8.0

RELENG_7_4_0_RELEASE

  FreeBSD 7.4

RELENG_7_3_0_RELEASE

  FreeBSD 7.3

RELENG_7_2_0_RELEASE

  FreeBSD 7.2

RELENG_7_1_0_RELEASE

  FreeBSD 7.1

RELENG_7_0_0_RELEASE

  FreeBSD 7.0

RELENG_6_4_0_RELEASE

  FreeBSD 6.4

RELENG_6_3_0_RELEASE

  FreeBSD 6.3

RELENG_6_2_0_RELEASE

  FreeBSD 6.2

RELENG_6_1_0_RELEASE

  FreeBSD 6.1

RELENG_6_0_0_RELEASE

  FreeBSD 6.0

RELENG_5_5_0_RELEASE

  FreeBSD 5.5

RELENG_5_4_0_RELEASE

  FreeBSD 5.4

RELENG_4_11_0_RELEASE

  FreeBSD 4.11

RELENG_5_3_0_RELEASE

  FreeBSD 5.3

RELENG_4_10_0_RELEASE

  FreeBSD 4.10

RELENG_5_2_1_RELEASE

  FreeBSD 5.2.1

RELENG_5_2_0_RELEASE

  FreeBSD 5.2

RELENG_4_9_0_RELEASE

  FreeBSD 4.9

RELENG_5_1_0_RELEASE

  FreeBSD 5.1

RELENG_4_8_0_RELEASE

  FreeBSD 4.8

RELENG_5_0_0_RELEASE

  FreeBSD 5.0

RELENG_4_7_0_RELEASE

  FreeBSD 4.7

RELENG_4_6_2_RELEASE

  FreeBSD 4.6.2

RELENG_4_6_1_RELEASE

  FreeBSD 4.6.1

RELENG_4_6_0_RELEASE

  FreeBSD 4.6

RELENG_4_5_0_RELEASE

  FreeBSD 4.5

RELENG_4_4_0_RELEASE

  FreeBSD 4.4

RELENG_4_3_0_RELEASE

  FreeBSD 4.3

RELENG_4_2_0_RELEASE

  FreeBSD 4.2

RELENG_4_1_1_RELEASE

  FreeBSD 4.1.1

RELENG_4_1_0_RELEASE

  FreeBSD 4.1

RELENG_4_0_0_RELEASE

  FreeBSD 4.0

RELENG_3_5_0_RELEASE

  FreeBSD-3.5

RELENG_3_4_0_RELEASE

  FreeBSD-3.4

RELENG_3_3_0_RELEASE

  FreeBSD-3.3

RELENG_3_2_0_RELEASE

  FreeBSD-3.2

RELENG_3_1_0_RELEASE

  FreeBSD-3.1

RELENG_3_0_0_RELEASE

  FreeBSD-3.0

RELENG_2_2_8_RELEASE

  FreeBSD-2.2.8

RELENG_2_2_7_RELEASE

  FreeBSD-2.2.7

RELENG_2_2_6_RELEASE

  FreeBSD-2.2.6

RELENG_2_2_5_RELEASE

  FreeBSD-2.2.5

RELENG_2_2_2_RELEASE

  FreeBSD-2.2.2

RELENG_2_2_1_RELEASE

  FreeBSD-2.2.1

RELENG_2_2_0_RELEASE

  FreeBSD-2.2.0

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