If installing the CrashPlan app on Linux fails and displays the message Unable to download JRE; please check network connection, the cause may be an old version of wget. The installer uses wget to download a compatible version of the JRE from Code42. Wget versions 1.14 and earlier do not support Server Name Indication (SNI), which is required to connect to Code42's download server.
CrashPlan app on Linux devices using wget version 1.14 or earlier. To see what version of wget your system has, enter the command:
To resolve this issue, follow the steps below:
- Update your version of wget to at least version 1.15 using your package manager. Depending on your Linux distribution, you might use one of these commands:
sudo apt-get install wget(Ubuntu)
sudo yum upgrade wget(Red Hat)
- Uninstall and reinstall your CrashPlan app.
To resolve the issue without updating wget, follow the steps below to manually retrieve the required JRE:
- Uninstall the CrashPlan app.
- Download the JRE that matches your CrashPlan app version.
- Move the JRE tarball into the CrashPlan installation folder.
- By default: ~/Downloads/crashplan-install/
- Use the installer downloaded in step 1 to reinstall the CrashPlan app.
The CrashPlan app installer locates the JRE and installs successfully.
The core problem is with older versions of wget, so if you follow the alternative solution without updating wget, you'll need to do this again the next time there's a CrashPlan app update.