If you get an error like:

subprocess installed post-removal script returned error exit status 78

when installing/removing/updating a package with apt you should check the postinst, postrm, prerm, ... script in /var/lib/dpkg/info/.

For example in my case I had a problem when removing varnish:

Removing varnish (4.0.3-2~trusty) ...
dpkg: error processing package varnish (--remove):
 subprocess installed post-removal script returned error exit status 78
Errors were encountered while processing:
 varnish

So I checked the /var/lib/dpkg/info/varnish.postrm for exit 78 and found the following:

[...]
        if test -e /var/lib/varnish; then

                rm -r /var/lib/varnish > /dev/null 2>&1 || exit 78
        fi
[...]

This directory couldn't get removed because there was a mount to /var/lib/varnish/. After I've unmounted it, it could get successfully removed.

Kim Klotz

makandra.com

Say thanks2

Last edit

2015-10-13

Kim Klotz

License

Source code in this card is licensed under the MIT License.

Async control flow in JavaScript: Promises, Microtasks, async/await

Slides for Henning's talk on Sep 21st 2017.

Understanding sync vs. async control flow

Talking to synchronous (or "blocking") API

print('script start')
html = get('/foo')
print(html)
print('script end'...

Delivering Carrierwave attachments to authorized users only

Preparation

To attach files to your records, you will need a new database column representing the filename of the file. To do this, add a new migration (rails g migration <name>) with the following content:

class AddAttachmentToNotes...

Posted by Kim Klotz to makandra dev (2015-10-13 21:21)

Fix "subprocess installed post-removal script returned error exit status ..." when installing/removing/updating a package with apt

Related cards:

Understanding sync vs. async control flow

Talking to synchronous (or "blocking") API

Summary

Preparation

Introduction