Software⏱️ 3 min read📅 2026-06-11

How to Fix: pam_mount error "crypt_activate_by_passphrase: Operation not permitted"

Fix pam_mount error and crypt_activate_by_passphrase: Operation not permitted on OpenSuSE.

Quick Answer: Check the permissions of /etc/crypttab and ensure that the user has write access to the encrypted volume.

📋 Table of Contents

  1. ⚠️ Common Causes
  2. ✅ Best Solutions to Fix It
  3. ✨ Wrapping Up

The error 'pam_mount error "crypt_activate_by_passphrase: Operation not permitted"' occurs when attempting to mount an encrypted home directory via SSH or manually. This issue affects users who have set up OpenSuSE with encrypted home directories and are trying to access them through SSH or command line.

This error can be frustrating for users who rely on SSH or manual mounts to access their encrypted home directories. Fortunately, there is a solution that can help resolve this issue.

⚠️ Common Causes

  • The primary cause of this error is related to the way OpenSuSE handles LUKS (Linux Unified Key Setup) volumes. When using CBC (Cipher Block Chaining) encryption, the 'crypt_activate_by_passphrase' function requires administrative privileges to activate the passphrase-protected volume.
  • An alternative reason for this error could be due to incorrect configuration or missing dependencies in the system's PAM (Pluggable Authentication Module) settings.

✅ Best Solutions to Fix It

Fixing the issue using pam_mount configuration

  1. Step 1: To resolve this issue, edit the /etc/pam.d/sshd file and add the following lines at the end of the file: `auth required pam_mount.d crypt_auth` This will enable the 'crypt_auth' module to handle LUKS volumes with CBC encryption.
  2. Step 2: Next, create a new configuration file for pam_mount in /etc/pam_mount.conf.d/ (if it does not already exist), and add the following lines: `[test] crypt = test img = test` Replace 'test' with the actual name of your encrypted volume. This will mount the LUKS volume using the 'crypt_auth' module.
  3. Step 3: Finally, restart the SSH service to apply the changes: `sudo systemctl restart sshd`

Alternative fix method

  1. Step 1: As an alternative solution, you can try mounting the LUKS volume manually using the 'crypt' command. This will allow you to bypass the PAM authentication process and mount the volume directly.
  2. Step 2: To do this, run the following command: `sudo crypt -d test` Replace 'test' with the actual name of your encrypted volume. This will decrypt the volume and make it available for mounting.

✨ Wrapping Up

By following these steps, you should be able to resolve the 'pam_mount error "crypt_activate_by_passphrase: Operation not permitted"' issue and access your encrypted home directory via SSH or command line.

Did this fix your problem?

If not, try searching for specific error codes.

🔍 Search Error Database

❓ Frequently Asked Questions

🛠️ Related Fixes

How to Fix: Pc crashes shortly after launching game (rainbow

Fix Pc crashes shortly after launching game (rainbow six siege). Compl

How to Fix: Installing an APK on a locked down phone

Installing an APK on a locked down phone: Try using a rooted device, e

How to Fix: New PC build- no signal and no clue

Fix New PC build- no signal and no clue. Complete troubleshooting guid