[PROBLEM] How to uninstall fail2ban? it fails with errors.

[postcd]

I have installed fail2ban: http://forum.xbian.org/thread-4178-post-37899.html#pid37899 (now closed )
But it can't uninstall now (as per the output)

Quote:dpkg: error processing package fail2ban (--remove):
installed fail2ban package pre-removal script subprocess returned error exit status 1

Running on BCM2711 with XBian 12.0 - Bullseye, kernel: Linux ARM 32-bit version 6.1.66+

Please what to try?

UPDATE:
I have prefixed three lines of the second "if" confition in /var/lib/dpkg/info/fail2ban.prerm by character "#" and then it removed the package without "pre-removal script" error. Thanks

[Nachteule]

A bit late, but there are snapshots for such cases. Simply revert to the snapshot that was created before file2ban was installed.

Another alternative would be to comment out the command that produces the error in the maintenance script and try again. I have had to do this several times, Theese scripts are located in /var/lib/dpkg/info/, in your case files /var/lib/dpkg/info/fail2ban*

hth

[jamegreatjame]

(17th Jul, 2024 06:23 PM)Nachteule Wrote:  A bit late, but there are snapshots for such cases. Simply revert to the snapshot that was created before file2ban was installed.

Another alternative would be to comment out the command that produces the error in the maintenance script and try again. I have had to do this several times, Theese scripts are located in /var/lib/dpkg/info/, in your case files /var/lib/dpkg/info/fail2ban*

hth

Yes, It is really helpful, thank you for sharing this tip.

[sarausa0106]

If you already have other security measures in place (such as firewalls, VPNs, or other security software), you may feel that Fail2Ban is no longer necessary. Suika game

[asher]

(17th Jul, 2024 06:23 PM)Nachteule bitlife Wrote:  A bit late, but there are snapshots for such cases. Simply revert to the snapshot that was created before file2ban was installed.

Another alternative would be to comment out the command that produces the error in the maintenance script and try again. I have had to do this several times, Theese scripts are located in /var/lib/dpkg/info/, in your case files /var/lib/dpkg/info/fail2ban*

hth

Thanks for sharing the solution! The idea of ​​using snapshots and editing scripts is beneficial and practical in situations like this.

[Alice12]

If the uninstall fails with errors, you might need to manually remove Fail2Ban files
Love Pawsona

[oliviawilde168]

(17th Jul, 2024 06:23 PM)Nachteule Wrote:  A bit late, but there are snapshots for such cases. Simply revert to the snapshot that was created before file2ban was installed.

Another alternative would be to comment out the command that produces the error in the maintenance script and try again. I have had to do this several times, Theese scripts are located in /var/lib/dpkg/info/, in your case files /var/lib/dpkg/info/fail2ban* cookie clicker

hth

Before commenting out a command, try to understand its purpose. If it's crucial for the package's functionality, you'll need to find a proper solution, not just bypass the error.

[Chinmayi]

(2nd Jul, 2024 04:42 AM)postcd Wrote:  I have installed fail2ban: http://forum.xbian.org/thread-4178-post-37899.html#pid37899 (now closed )
But it can't uninstall now (as per the output)crossy road

Quote:dpkg: error processing package fail2ban (--remove):
installed fail2ban package pre-removal script subprocess returned error exit status 1

Running on BCM2711 with XBian 12.0 - Bullseye, kernel: Linux ARM 32-bit version 6.1.66+

Please what to try?

UPDATE:
I have prefixed three lines of the second "if" confition in /var/lib/dpkg/info/fail2ban.prerm by character "#" and then it removed the package without "pre-removal script" error. Thanks

What are the potential risks or implications of modifying the fail2ban.prerm script to successfully uninstall the package, and are there safer alternatives to resolve the uninstall errors?