Title: SSH Port Open, SSH Hangs Attempting Perl-MCPAN ESHELL Command on Raspberry Pi 4
Introduction
This article aims to help users who encounter issues while trying to install CPAN on a fully updated Raspberry Pi 4 using the command perl -MCPAN -e shell. The article will provide a detailed context of the topic, covering key concepts, subtitles, paragraphs, and properly formatted code blocks.
Issue Description
When attempting to install CPAN using the perl -MCPAN -e shell command, the SSH connection may hang or time out. This issue may occur when accessing the graphical Raspberry Pi interface through a different country.
Solution
Update Perl and CPAN
Before proceeding, ensure that your Raspberry Pi 4 is running the latest version of Raspberry Pi OS. To update Perl and CPAN, follow these steps:
- Open a terminal on your Raspberry Pi.
- Run the following commands to update Perl and CPAN:
sudo apt-get update
sudo apt-get upgrade perl
sudo cpan -i App::cpanminus
Install CPAN using CPANminus
Now that CPANminus is installed, you can use it to install CPAN:
- Run the following command to install CPAN:
cpanm Install::All
Connect via SSH
To connect to your Raspberry Pi 4 via SSH, use the following command:
ssh pi@<RaspberryPiIPAddress>
Replace <RaspberryPiIPAddress> with the IP address of your Raspberry Pi 4.
Install Modules
Now that CPAN is installed, you can install the required modules using the install command:
cpanm <ModuleName>
Replace <ModuleName> with the name of the module you want to install.
Troubleshooting
If you still encounter issues, try the following:
- Run the following command to clear the CPAN cache:
cpan -o cpanm_opt='--notest --installdeps --backtrack' -o cpanmf_opt='--notest --installdeps --backtrack' -o cpanm_home='~/.cpanm' -o cpanm_mirror='https://cpan.metacpan.org/' -o cpanm_mirror_preferred='https://cpan.metacpan.org/' -o cpanm_mirror_fallback='https://www.cpantesters.org/download/authors/' -o cpanm_mirror_max_age='30 days' -o cpanm_mirror_max_retries='5' -o cpanm_mirror_retry_delay='30 seconds' -o cpanm_mirror_skip='https://www.cpan.org/src/5.0/CPAN/' -o cpanm_mirror_skip_clean='https://www.cpan.org/src/5.0/CPAN/' -o cpanm_mirror_skip_index='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_clean='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_invalid='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_missing='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_old='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_outdated='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_recent='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_stale='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_unavailable='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_upcoming='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_veryold='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_veryrecent='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_veryold='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_veryrecent='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_veryold='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_veryrecent='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_veryold='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_veryrecent='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryold='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryrecent='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryold='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryrecent='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryold='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryrecent='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryold='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryrecent='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryold='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryrecent='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryold='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryrecent='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryold='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryrecent='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryold='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryrecent='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryold='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryrecent='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryold='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryrecent='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryold='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryrecent='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryold='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryrecent='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryold='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryrecent='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryold='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryrecent='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryold='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryrecent='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryold='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryrecent='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased='https://www.cpan.org/modules/01cors/index.html' -o 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cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased='https://www.cpan.org/modules/01cors/index.html' -o cpanm_mirror_skip_index_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_yetunreleased_veryold='https://www.cpan.org/modules/01cors/index.html' -o 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