FreeBSD Handbook
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A.7 CVS Tags

When obtaining or updating sources from cvs and CVSup a revision tag (reference to a date in time) must be specified. The following tags are available, each specifying different branches of FreeBSD at different points of time:

Note: The ports tree does not have any tag associated with it, it is always CURRENT.

The most common tags are:

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_4

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

RELENG_4_7

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

RELENG_4_6

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

RELENG_4_5

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

RELENG_4_4

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

RELENG_4_3

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

Other revision tags that are available include:

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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