Kein Zugriff per SSH

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Guten Tag,

Ich weiß ehrlich gesagt nicht weiter, ich habe keinen Zugriff per SSH und weiß leider auch nicht wie ich dieses Problem lösen kann. Weiß jemand zufällig Rat?

Vielen Dank im Voraus.

2

1. Boot into Single User Mode (Recovery Mode):

  1. Reboot the Server: Restart your server. If you are using a physical server, you may need to press the reset button or power cycle it.
  2. Access GRUB Menu: During the boot process, you need to access the GRUB menu. This can usually be done by pressing the Esc or Shift key repeatedly right after the BIOS/UEFI screen.
  3. Edit GRUB Entry:
  • In the GRUB menu, select the entry for your Linux system and press e to edit it.
  • Find the line that starts with linux and append single or init=/bin/bash at the end of this line. This will boot the system into single-user mode or a bash shell.

For example:

linux /boot/vmlinuz-5.10.0-29-amd64 root=UUID=xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx ro single
  1. Boot with Modified Entry: Press Ctrl + X or F10 to boot with these parameters.

2. Fix the Permissions:

Once you are in single-user mode or a bash shell, you can fix the permissions and ownership issues.

  1. Remount Root Filesystem:
mount -o remount,rw /
  1. Check and Change Ownership and Permissions:
ls -ld /home/casaos
chown casaos:casaos /home/casaos
chmod 755 /home/casaos
  1. Ensure Shell is Executable:
chsh -s /bin/bash casaos
  1. Check /etc/passwd: Ensure the home directory and shell for the casaos user are correctly set in /etc/passwd.
grep casaos /etc/passwd

The output should be something like:

casaos:x:1001:1001::/home/casaos:/bin/bash

3. Reboot the Server:

After making these changes, reboot the server normally:

reboot

4. Attempt to SSH Again:

After the server reboots, try to SSH into the casaos user account again. The permissions and ownership should now be correct, and you should be able to log in successfully.