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perlbrew - Perl Environment manager.


    perlbrew <command> [options] [arguments]

    Commonly used commands:
        init           Initialize perlbrew environment.
        install        Install perl
        uninstall      Uninstall the given installation
        list           List installed perls
        use            Use the specified perl in current shell
        available      List perls available to install
        switch         Permanently use the specified perl as default
        mirror         Pick a preferred mirror site
        off            Permanently turn off perlbrew, go back to system Perl
        version        Display version
        help           Read more detailed instructions

        perlbrew install perl-5.14.0
        perlbrew install 5.12.3

        perlbrew list

        perlbrew use perl-5.12.3
        perlbrew switch perl-5.14.0

        perlbrew switch /path/to/special/perl
        perlbrew switch /path/to/special/perl special-perl

        # later
        perlbrew switch special-perl



Run this once to setup the perlbrew directory ready for installing perls into. Run it again if you decide to change PERLBREW_ROOT.

install perl-<version-number>
install <version-number>

Build and install the given version of perl.

Version numbers usually look like "5.x.xx", or "perl-5.xx.x-RCx" for release candidates.

The specified perl is downloaded from the CPAN website, unless mirror setting are present.

install perl-blead
install blead

A special way to install the blead version of perl.

The blead version is downloaded from:


This command does not consult mirror settings.

install /path/to/perl/git/checkout/dir

Build and install from the given git checkout dir.

install /path/to/perl-5.14.0.tar.gz

Build and install from the given archive file.

install http://example.com/mirror/perl-5.12.3.tar.gz

Build and install from the given URL. Supported URL schemes are http://, https://, ftp:// and file://.

uninstall <target>

Uninstalls the given version.


Run this if you want to choose a specific CPAN mirror to install the perls from. It will display a list of mirrors for you to pick from. Hit 'q' to cancel the selection.


List the installed versions of perl.

use [perl-<version>]
use [<version>]

Switch to the given version of perl only in the current shell. This will not effect newly opened shells.

You can use as perl-version the special keyword system to stop using any perlbrew-based perl.

Without a parameter, shows the version of perl currently in use.


Displays the available versions of perl on CPAN.

switch [perl-<version>]
switch [<version>]

Switch to the given version, and makes it the default for this and all future terminal sessions.

Without a parameter, shows the version of perl currently selected.

alias [-f] create <name> <alias>

Create an alias for the installation named <name>.

alias [-f] rename <old_alias> <new_alias>

Rename the alias to a new name.

alias delete <alias>

Delete the given alias.


Disable perlbrew. Use switch command to re-enable it.

Re-enables the default system Perl, whatever that is.

exec command

Execute command for all perls.

For example, run a Hello program:

    perlbrew exec perl -e 'print "Hello from $]\n"'

Depending on your actual installations, the output might look like this:

    Hello word from perl-5.012002
    Hello word from perl-5.012003
    Hello word from perl-5.013010
    Hello word from perl-5.014000
env [perl-version]

Low-level command. Use this command to see the list of environment variables that are set by perlbrew itself for shell integration.

The output is something similar to this (if your shell is bash):

    export PERLBREW_ROOT=/Users/gugod/perl5/perlbrew
    export PERLBREW_VERSION=0.13
    export PERLBREW_PATH=/Users/gugod/perl5/perlbrew/bin:/Users/gugod/perl5/perlbrew/perls/current/bin
    export PERLBREW_PERL=perl-5.12.3

You can also ask for the proper variables for a specific perl version.

Low-level command. Use this command to create the perl executable symbolic link to , say, perl5.13.6. This is only useful for development version of perls.

You don't need to do this unless you have been using old perlbrew to install perls. The installation layout is changed since version 0.11.

If you just upgraded perlbrew and found perlbrew switch failed to work after you switch to a development release of perl, say, perl-5.13.6, run this command:

    perlbrew symlink_executables perl-5.13.6

This essentially creates this symlink:

   -> ${PERLBREW_ROOT}/perls/perl-5.13.6/bin/perl5.13.6

Install the cpanm standalone executable in $PERLBREW_ROOT/bin.


This command upgrades Perlbrew to its latest version.


Show the version of perlbrew.


-h| --help

prints this help.

-f| --force

Force installation of a perl.


Enable parallel make and test (if supported by the target perl)

  perlbrew install -j 5 perl-5.12.3
-n| --notest

Skip the test suite

-q| --quiet

Log output to a log file rather than STDOUT. This is the default. The log file is saved in $ROOT/build.log

-v| --verbose

Log output to STDOUT rather than a log file.


Install a given perl under an alias.

    perlbrew install perl-5.6.2 --as legacy-perl
-D, -U, -A

pass through switches to the perl Configure script.

    perlbrew install perl-5.10.1 -D usemymalloc -U uselargefiles



By default, perlbrew builds and installs perls into $ENV{HOME}/perl5/perlbrew directory. To use a different directory, set this environment variable in your bashrc to the directory before running perlbrew.


If you upgraded perlbrew from version 0.16 or older, you should do this cleanup your setup. Failure to do so might make the use command to fail.

Note the version of perl currently selected with perlbrew switch. Then turn perlbrew off, and switched back again with perlbrew switch previous-perl-version.


App::perlbrew, App::cpanminus