How do I find out what perl modules already installed on my system?

by nixcraft · 15 comments

Q. Quick question - What command I need to use to list all installed perl modules on my Linux / UNIX system?

A. You need to use instmodsh (interactive inventory for installed Perl modules) command to find out what modules already installed on my system.

instmodsh command provides an interactive shell type interface to query details of locally installed Perl modules. It is a little interface to ExtUtils::Installed to examine locally* installed modules, validate your packlists and even create a tarball from an installed module.

Task: List installed perl module

To display the list enter the following command:
$ instmodsh
Output:

Available commands are:
l            - List all installed modules
m    - Select a module
q            - Quit the program
cmd?

At cmd? prompt type l to list all installed modules:
cmd? l
Output:

Installed modules are:
Archive::Tar
CPAN
Class::Spiffy
Compress::Zlib
Cwd
Digest::SHA
IO::Zlib
MIME::Lite
Module::Build
Module::Signature
Net::Telnet
PAR::Dist
Perl
Spiffy
Term::ReadLine
Test::Base
Test::Simple
Text::Glob
Weather::Com
XML::Simple
YAML
cmd?

This command itself is a perl script that use ExtUtils::Installed module. Try following command to see its source code:
$ vi $(which instmodsh)

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{ 15 comments… read them below or add one }

1 z0idberg 02.21.07 at 2:49 pm

Thanks, helpful tool.

While looking for how to do this I also came across this as an option:

$ perldoc perllocal

Will print out all your installed modules as well as when they were installed and where as well as a couple of other bits of info. You can direct the output to a file as well which is handy.

2 Pi3cH 03.03.07 at 1:43 pm

Thanks, it’s useful for me too.
enter
m Perl
then enter an f
to see details of perl packages.

3 Amit 12.17.08 at 9:23 am

Thnx

4 Shyam 01.12.09 at 11:43 pm

Use the following command on Unix/Linux to find Perl moduls installed
on your system:

find `perl -e ‘print “@INC”‘ ` -name ‘*.pm’ -print > all_modsOnSys

5 Ashok1729 01.14.09 at 9:16 am

Hi Friend,

syntax error at -e line 1, near “.”
Execution of -e aborted due to compilation errors.
find: path-list predicate-list

Pls update. Ashok1729 :-)( Don’t give ur knowledge to others, just share it.

6 Ashok1729 01.14.09 at 9:17 am

syntax error at -e line 1, near “.”
Execution of -e aborted due to compilation errors.
find: path-list predicate-list

7 Oscar the Grouch 01.27.09 at 7:48 pm

above poster is a noob:

find `perl -e ‘print “@INC”‘` -name ‘*.pm’ -print | tee ~/Perl-modules-installed.txt

8 Ryan 02.03.09 at 4:53 pm

Or better yet:
find `perl -e 'print "@INC"'` -name '*.pm' -print | tee ~/Perl-modules-installed.txt

(Hopefully the above appears in a more copy and paste friendly format)

9 serguei 02.05.09 at 10:34 pm

to have * all* modules listed, a minor modification is required:

find `perl -e '{print join $/, grep {/[^.]/} @INC}'` -name '*pm' 2>/dev/null

10 serguei 02.05.09 at 10:35 pm

to have * all* modules listed, a minor modification is required:

find -L `perl -e '{print join $/, grep {/[^.]/} @INC}'` -name '*pm' 2>/dev/null

11 serguei 02.05.09 at 10:37 pm

sorry, the -L was accidentally missing from my post . It is required for find to raverse symlinks, and Perl 5.8.8. is such

find -L `perl -e '{print join $/, grep {/[^.]/} @INC}’` -name ‘*pm’ 2>/dev/null

12 AlmostDaly 10.14.09 at 2:13 pm

I banged up a quick script to list them when i came across this issue a while back:

use ExtUtils::Installed;
my $Inst = ExtUtils::Installed->new();
my @Modules = $Inst->modules();
print "Current List of Installed PERL Modules:\n\n";
foreach my $mod(@Modules){
print "$mod\n";
}

13 Rob 11.13.09 at 4:23 pm

@serguei wrote (11):

find -L `perl -e '{print join $/, grep {/[^.]/} @INC}’` -name ‘*pm’ 2>/dev/null

so I tried it and got an error:

>]/usr/bin]>find -L `perl -e '{print join $/, grep {/[^.]/} @INC}` -name *pm 2>/dev/
null
-bash: command substitution: line 1: unexpected EOF while looking for matching `''
-bash: command substitution: line 2: syntax error: unexpected end of file
>

BUT (9):

find `perl -e '{print join $/, grep {/[^.]/} @INC}'` -name '*pm' 2>/dev/null

works

The -L option at comment (10) doesnt:
find -L `perl -e ‘{print join $/, grep {/[^.]/} @INC}’` -name ‘*pm’ 2>/dev/null

AlmostDaly wrote (12):

use ExtUtils::Installed;
my $Inst = ExtUtils::Installed->new();
my @Modules = $Inst->modules();
print "Current List of Installed PERL Modules:\n\n";
foreach my $mod(@Modules){
print "$mod\n";
}

That’s fine if you have the ExtUtils CPAN module installed as standard. But can we assume this is always present?

14 AlmostDaly 12.15.09 at 8:11 pm

Not assuming… but install it. Why wouldn’t you, its hardly ideal to run these long commands when you can alias a script to list them…

15 LisPerlati 12.17.09 at 4:01 am

Hello All,

None of the above helped me. I tried copy paste but no luck. I probably don’t need to do any of the above.

I just need to find out if Gtk is installed on my system(Mac Leopard), I tried using Gtk in but it can’t find anything called Gtk…please help,

Thanks,
LisPerlati

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