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If you can still open a privileged SSH or console session, reset the password immediately with passwd (or sudo passwd to set root’s password). If normal access is blocked, use your provider’s “Reset Root Password” control when available; otherwise boot Rescue Mode, mount the installed system, enter it with chroot, and run passwd root. A changed password does not automatically enable root-password logins over SSH.
Choose the recovery route that matches your access
Use the least invasive method available. A working privileged shell avoids disk mounting; a provider-panel reset avoids identifying partitions; Rescue Mode is the fallback when the installed operating system cannot be reached.
| What you can access | Best method | Main risk | What it changes |
|---|---|---|---|
| Root shell or a sudo-capable user over SSH or the provider console | Run passwd or sudo passwd |
Low; you are changing the live system | The account’s password database entry |
| Provider control panel and emergency console | Use the provider’s root-password reset action | Low to moderate; labels and reboot behavior vary | Usually the root credential on the VPS image |
| Provider account, but no usable login to the VPS | Activate Rescue Mode and use mount plus chroot |
Incorrect partition or unclean unmount can cause data loss | The password on the installed disk |
| Console access to a RHEL-family image with no usable account | Boot with the rd.break emergency-shell parameter |
Bootloader editing and SELinux handling are required | The password from an early boot environment |
Panel terminology is provider-specific. Hetzner calls its action “Reset Root Password,” while Victus Cloud documents a comparable control-panel route. If your provider offers that option, it is generally less error-prone than manually mounting a disk.
Prepare before changing anything
- Create a snapshot or backup. IONOS explicitly warns that an incorrect mount or filesystem operation can cause data loss and requires a backup before its reset procedure.
- Confirm an alternative console. Keep the provider’s web console or emergency console available in case SSH configuration prevents the new password from working.
- Record the operating system and access model. Ubuntu commonly expects an installer-created user in the
sudogroup; many current images expect an SSH key and deliberately disable root-password authentication. - Plan a maintenance window. Rescue Mode normally requires a reboot, and a security-context relabel on SELinux systems can make the first subsequent boot take longer.
- Do not assume a disk name. VPS devices may appear as
/dev/sda1,/dev/vda1, or/dev/xvdb1. Verify the installed root partition withlsblk.
Method 1: reset the password from an existing privileged session
When you are already logged in as root
Open a shell and run:
passwdEnter the new password at the first prompt and enter it again at the confirmation prompt. A successful run reports that the password was updated. The command changes the password for the account represented by your current root shell.
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When you are logged in as a sudo-capable user
On Ubuntu and similar installations, set root’s password with:
sudo passwdsudo first authenticates your existing user, then passwd prompts for the new root password twice. To change another account instead, specify its name, for example:
sudo passwd usernameUbuntu’s installer normally places its initial user in the sudo group, so this route works even when the root account has never had an active password.
Lock the root password again on Ubuntu
If you needed a temporary root credential but intend to administer the server through sudo, lock the password after testing your sudo access:
sudo passwd -l rootLocking the password does not remove the root account or your sudo rights; it prevents password authentication for that account. Keep a tested sudo user and a working console or SSH key before locking it.
Method 2: use the provider control panel
A panel reset is preferable when ordinary login is unavailable and the provider exposes the feature. It avoids guessing which partition contains the installed system and usually performs the provider’s supported recovery sequence.
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- Choose the root-password action. On Hetzner the label is Reset Root Password; other providers may use “reset credentials” or similar wording.
- Read the confirmation dialog carefully. Some panels display a generated password once, while others let you enter a value. Store it in a password manager rather than in shell history or a ticket.
- Apply the change and wait for the panel to report completion. Follow any instruction to reboot, or use the provider’s console to reboot only after the reset has completed.
- Test the credential through the emergency or web console first. Then test SSH only if the image permits root-password authentication.
Victus Cloud describes this panel-first approach as the one-line alternative to an in-session passwd command. The exact control and whether it forces a reboot depend on the provider and image, so do not assume that a panel reset has the same side effects everywhere.
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Method 3: reset it from Rescue Mode with mount and chroot
Use this provider-neutral sequence when you can activate a rescue image but cannot log in to the installed system. The rescue environment runs from a separate image; your normal root filesystem must be mounted before passwd will affect the VPS account.
1. Activate Rescue Mode and open its shell
In the provider panel, enable Rescue Mode or the recovery image, then connect through the emergency console or the rescue SSH credentials supplied by the provider. Follow the provider’s documented reboot step so the VPS actually starts the rescue environment.
2. Identify the installed root partition
List disks and filesystems:
lsblk
lsblk -fLook for the Linux filesystem containing directories such as /etc, /var, and /home when mounted. Device names differ between virtual machine platforms; examples documented by providers include /dev/sda1, /dev/vda1, and /dev/xvdb1. Never copy an example device name without checking your own output. Selecting a data partition instead of the installed root can alter the wrong filesystem.
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Create the mount point if the rescue image does not already provide it, then mount the partition you identified:
mkdir -p /mnt
mount /dev/sda1 /mntReplace /dev/sda1 with the device you verified. If the mount fails, stop and resolve the filesystem or device issue rather than trying random partitions. A read-only mount will also prevent a password update; check the rescue documentation before remounting anything read-write.
4. Bind the virtual filesystems
The chrooted system needs access to device, process, and system interfaces. A portable pattern is:
for d in dev proc sys; do mount --bind /$d /mnt/$d; doneSome rescue procedures, including Gandi’s example, also bind the pseudo-terminal tree explicitly:
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mount --bind /dev/pts /mnt/dev/ptsUse the provider’s exact sequence if it differs. The bind mounts are temporary and must be removed before rebooting into the normal disk.
5. Enter the installed operating system
Change the apparent root directory to the mounted installation:
chroot /mntFrom this point, commands such as passwd write to the mounted VPS installation rather than to the rescue image. Confirm the environment if needed by checking that /etc contains the installed system’s configuration.
6. Set the root or named user password
Run the appropriate command inside the chroot:
passwd rootTo recover a different local account, substitute its login name:
passwd usernameEnter the new value twice. If the command reports that the filesystem is read-only, leave the chroot and correct the mount state according to the provider’s recovery instructions before trying again.
7. Schedule an SELinux relabel when required
AlmaLinux, Rocky Linux, CentOS Stream, and Fedora images using SELinux may need their security contexts rebuilt after offline changes. While still inside the chroot, create the marker file:
touch /.autorelabelThe next normal boot will relabel files. Do this when the image’s rescue documentation calls for it; creating the marker is particularly important after the RHEL-family recovery flow.
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8. Exit and unmount cleanly
Leave the installed system:
exitUnmount the pseudo-terminal and bind mounts, then the root filesystem, using the reverse order of mounting. One explicit sequence is:
umount /mnt/dev/pts
umount /mnt/dev
umount /mnt/proc
umount /mnt/sys
umount /mntIf a provider’s documented layout uses different mount points, follow that layout. A “target is busy” message usually means a shell or process still has its current directory under /mnt; return to the rescue system’s top-level directory and retry after stopping any temporary process.
9. Disable Rescue Mode and reboot
Deactivate the rescue image in the provider panel, then reboot into the normal disk. Do not test the new password against the rescue shell; that shell uses its own accounts. Wait for the VPS to boot from its installed disk before validating the recovered account.
RHEL-family alternative: the rd.break emergency shell
When a RHEL-family VPS provides a usable console but no account can authenticate, Red Hat documents a bootloader recovery pattern using the rd.break kernel parameter. This route edits the boot entry instead of mounting the disk from a separate provider rescue image.
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- Edit the selected kernel entry and append
rd.breakto the kernel command line, following the console’s editor instructions. - Continue booting into the emergency shell. The installed system is commonly mounted at
/sysroot. - Remount it read-write:
mount -o remount,rw /sysroot- Enter the installed system:
chroot /sysroot- Set the password:
passwd- If SELinux is enabled, schedule relabeling:
touch /.autorelabel- Exit the chroot and emergency shell, then reboot through the console. The exact number of
exitcommands depends on how many shells you entered.
This method is specific to the boot process and image configuration. If your provider supplies a rescue image, its documented mount-and-chroot procedure is usually easier to audit and repeat.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Why SSH may still reject the new root password
A successful passwd operation proves only that the local account has a new password. SSH applies a separate authentication policy. Hetzner notes that newer systems such as Debian 11 and Ubuntu 22.04 disabled root password authentication by default because unrestricted root passwords are vulnerable to brute-force attacks. Its reset guidance was created and last changed on June 2, 2026.
If the console accepts the password but SSH returns “Permission denied,” check these items from a console or a known-good sudo session:
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PermitRootLogin: the SSH server may allow root only with a key, or prohibit root entirely.PasswordAuthentication: the server may reject all password-based SSH logins even though local passwords work.- Firewall and network policy: a VPS firewall, security group, or provider rule may block port 22 or your source address.
- Image access design: the image may expect an ordinary user plus an SSH key and sudo, not direct root login.
- Account state: root may be locked, expired, or restricted by an included access policy.
Do not disable key-based or sudo access while experimenting. First prove that a second administrative path works through the provider console or a separate sudo user. If you intentionally change SSH settings, validate a new session before closing the working one and reload the SSH service using the command appropriate to that distribution.
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Verify the recovery without locking yourself out
Test locally through the provider console
Use the web or emergency console to log in with the recovered account. A console test separates password correctness from SSH policy and network reachability.
Test sudo administration
If your normal model uses an unprivileged administrator, log in as that user and run a harmless command with sudo. This confirms that the account, sudo membership, and policy still work before you lock or restrict root.
Test SSH in a second session
Keep the existing console or SSH connection open. From a separate terminal, test the intended key or password method. Only close the original session after the new path succeeds.
Check the boot after an offline reset
After Rescue Mode or rd.break, confirm that the VPS boots from its normal disk and that services start normally. On SELinux images, allow time for the scheduled relabel before deciding that the boot has failed.
Troubleshooting common failures
| Symptom | Likely cause | Safe response |
|---|---|---|
passwd changes a password, but the VPS still rejects it |
You changed the rescue image’s account, or SSH root-password authentication is disabled | Verify the mounted root and test through the provider console; then inspect SSH policy. |
The expected /etc or user home directories are missing after mounting |
The wrong partition was selected | Exit the chroot, unmount cleanly, rerun lsblk -f, and identify the installed root before trying again. |
passwd reports an authentication-token or read-only error |
The mounted filesystem is not writable, or required virtual filesystems are absent | Check the mount state and bind mounts in the provider’s rescue instructions; do not force writes to an unverified device. |
| The first boot after recovery is unusually slow on an SELinux image | /.autorelabel is rebuilding security contexts |
Allow the relabel to finish and monitor the console rather than power-cycling repeatedly. |
| An unmount reports that the target is busy | A shell or process still uses a directory below /mnt |
Return to the rescue environment’s top-level directory, stop temporary processes, and unmount in reverse order. |
| The provider reset control is absent | The plan or image does not expose a panel reset | Use the documented Rescue Mode workflow or request the provider’s emergency-console procedure. |
Secure the VPS after access is restored
Root is exposed to the internet whenever SSH is reachable on port 22. Victus Cloud recommends a long, random passphrase or, preferably, disabling password login and using an SSH key. Apply that advice only after a tested key or sudo route is available.
- Use a unique, randomly generated passphrase if a root password must remain enabled.
- Prefer an ordinary administrative user with sudo and an SSH key for routine work.
- Disable root-password SSH authentication when your image and operational procedures support key-based administration.
- Keep the provider console and recovery credentials protected by multi-factor authentication.
- Retain a current snapshot before future disk-level maintenance.
The safest sequence is therefore: use an existing privileged shell when possible, choose the provider panel before manual disk work, and reserve Rescue Mode or rd.break for a complete lockout. In every case, verify the actual login policy separately from the password change.
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