[Bug 1764858] Re: Can't update / install / delete packages due to missing libzstd.so.1

[Ubfan]

My situation breaking the install was a legacy install, to a disk
partition with another Ubuntu installation (16.04) maintaining the
bootloader files.  The install was done without a bootloader (select an
empty USB, and the error dialog allows you to procede without a
bootloader).  The update (after a month of successful updates) with a
kernel update 4.0.15-15), apparently got really messed up by this
situation.  There was no /var/log/installer directory, nor the
libzstd.so.1... library.  With the release, I'll just reinstall, let the
18.04 take over the bootloader,  and jump through the hoops to reinstall
grub from the  16.04 installation.  So, not every installation needs to
add a bootloader, but it's too bad it's not as simple as adding a "none"
to the choice of bootloader locations.

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https://bugs.launchpad.net/bugs/1764858

Title:
  Can't update / install / delete packages due to missing libzstd.so.1

Status in apt package in Ubuntu:
  Invalid

Bug description:
  Description:	Ubuntu Bionic Beaver (development branch)
  Release:	18.04

  After todays upgrade:

  vasily at vasily-desktop:~$ sudo apt-get update
  [sudo] пароль для vasily: 
  apt-get: error while loading shared libraries: libzstd.so.1: cannot open shared object file: No such file or directory

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