Learn how to fix the “Composer update failed optcpanelcomposerbincomposer could not be written“ error. Our cPanel Support team is here to help you with your questions and concerns.

Composer update failed optcpanelcomposerbincomposer could not be written

If you have been running into the following error, our experts have your back:

Composer update failed: “/opt/cpanel/composer/bin/composer”

According to our experts, we are running into this error when we use the composer update command via opt/cpanel/composer/bin/composer.

In other words, the error message lets us know that Composer is not able to update due to a writing permission issue for the composer executable file.

As seen in the error message, the Composer cannot write or modify the necessary files during the update process. This can be due to several reasons. However, the common cause is incorrect file permissions.

Troubleshooting Tips

Here are some tips to troubleshoot and fix this issue:

1. First, we have to make sure that the user running the composer update command has the needed permissions to write to the Composer executable file and the directory where it is located.

   We can easily check the permissions as seen here:

   ls -l /opt/cpanel/composer/bin/composer

   In case the permissions are not set correctly, we can use the chmod command to change them.
2. Next, we have to make sure we are running the composer update command as the correct user who has access to modify the Composer files. In case we are using a shared hosting environment or a specific cPanel user, we have to use the correct logins.
3. In some cases, a lack of disk space can result in this error. We have to check if our server has enough free disk space to carry out the update.
4. Alternatively, you can try updating Composer locally and then uploading the updated composer.phar file to the server.

   We can do this as seen here:

   1. First, run this command:

      composer self-update
   2. Then, locate the composer.phar file in the local project directory.
   3. After that, we have to upload the updated composer.phar file to the server and replace the existing one in /opt/cpanel/composer/bin/.

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Conclusion

In summary, our Support Techs demonstrated how to fix the “ Composer update failed /opt/cpanel/composer/bin/composer could not be written” error.