Hi. First of all: Sorry, I am probably reporting again(?) for the wrong issue(?) I have fully updated my ubuntu (see all the version information in the command output print below). However, my problem mentioned in https://bugs.launchpad.net/cloud-images/+bug/1943049/comments/43 still persists: I cannot install curl with &&-chained commands (and if I install it without using the &&-chain, it fails to access an url). Therefore, I cannot use curl to access a website (see https://bugs.launchpad.net/cloud-images/+bug/1943293, marked as duplicate of the problem in this thread). (Therefore, git on a https repo would not work either.) As said, I am not sure whether the new release or fix was supposed to solve this problem or whether I am commenting on a wrong topic. Nevertheless, here is the current state of my problem: 1. The chain "apt-get update && apt-get install -y curl" will fail. I think concatenating these commands with "&&" may be common in a docker build, therefore this may still be considered as an issue. 2. "apt-get install -y curl" alone (separately, after the update) does install curl, though, while printing some error message. 3. "curl https://bing.com" still fails with "curl: (6) getaddrinfo() thread failed to start", which was my originally reported problem in https://bugs.launchpad.net/cloud-images/+bug/1943293. Addendum/Update: A. I noticed just now that I overlooked the mentioning of https://wiki.ubuntu.com/Testing/EnableProposed in a prior post, i.e., I ran the test on my "normal" ubuntu. Sorry for that. B. Some of this post here seems to be cut-off but is downloadable in the "Download full text" link at the top. Below, please find the complete command chain and output: $ docker --version Docker version 20.10.7, build 20.10.7-0ubuntu1~21.04.2 $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 21.04 Release: 21.04 Codename: hirsute $ uname -a Linux laptop 5.11.0-37-generic #41-Ubuntu SMP Mon Sep 20 16:39:20 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux $ sudo docker run --rm -it --entrypoint=/bin/bash "ubuntu:21.10" Unable to find image 'ubuntu:21.10' locally 21.10: Pulling from library/ubuntu 6122078cc60f: Pull complete Digest: sha256:203d16099ec9f0529f1fd6e7f33cef02fc637bfae1d9d5721f733e59d4d90bad Status: Downloaded newer image for ubuntu:21.10 root@5ec4cc137ca7:/# uname -a Linux 5ec4cc137ca7 5.11.0-37-generic #41-Ubuntu SMP Mon Sep 20 16:39:20 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux root@5ec4cc137ca7:/# apt-get update && apt-get install -y curl Get:1 http://security.ubuntu.com/ubuntu impish-security InRelease [90.7 kB] Get:2 http://archive.ubuntu.com/ubuntu impish InRelease [269 kB] Get:3 http://archive.ubuntu.com/ubuntu impish-updates InRelease [90.7 kB] Get:4 http://archive.ubuntu.com/ubuntu impish-backports InRelease [90.7 kB] Get:5 http://archive.ubuntu.com/ubuntu impish/multiverse amd64 Packages [255 kB] Get:6 http://archive.ubuntu.com/ubuntu impish/restricted amd64 Packages [119 kB] Get:7 http://archive.ubuntu.com/ubuntu impish/universe amd64 Packages [16.7 MB] Get:8 http://archive.ubuntu.com/ubuntu impish/main amd64 Packages [1809 kB] Fetched 19.5 MB in 13s (1492 kB/s) Reading package lists... Done E: Problem executing scripts APT::Update::Post-Invoke 'rm -f /var/cache/apt/archives/*.deb /var/cache/apt/archives/partial/*.deb /var/cache/apt/*.bin || true' E: Sub-process returned an error code root@5ec4cc137ca7:/# curl https://bing.com bash: curl: command not found # apt-get install -y curl Reading package lists... Done Building dependency tree... Done Reading state information... Done The following additional packages will be installed: ca-certificates libbrotli1 libcurl4 libldap-2.5-0 libldap-common libnghttp2-14 libpsl5 librtmp1 libsasl2-2 libsasl2-modules libsasl2-modules-db libssh-4 openssl publicsuffix Suggested packages: libsasl2-modules-gssapi-mit | libsasl2-modules-gssapi-heimdal libsasl2-modules-ldap libsasl2-modules-otp libsasl2-modules-sql The following NEW packages will be installed: ca-certificates curl libbrotli1 libcurl4 libldap-2.5-0 libldap-common libnghttp2-14 libpsl5 librtmp1 libsasl2-2 libsasl2-modules libsasl2-modules-db libssh-4 openssl publicsuffix 0 upgraded, 15 newly installed, 0 to remove and 0 not upgraded. Need to get 2322 kB of archives. After this operation, 6122 kB of additional disk space will be used. Get:1 http://archive.ubuntu.com/ubuntu impish/main amd64 openssl amd64 1.1.1l-1ubuntu1 [651 kB] Get:2 http://archive.ubuntu.com/ubuntu impish/main amd64 ca-certificates all 20210119ubuntu1 [149 kB] Get:3 http://archive.ubuntu.com/ubuntu impish/main amd64 libpsl5 amd64 0.21.0-1.2 [53.5 kB] Get:4 http://archive.ubuntu.com/ubuntu impish/main amd64 publicsuffix all 20210108.1309-1 [116 kB] Get:5 http://archive.ubuntu.com/ubuntu impish/main amd64 libbrotli1 amd64 1.0.9-2build2 [274 kB] Get:6 http://archive.ubuntu.com/ubuntu impish/main amd64 libsasl2-modules-db amd64 2.1.27+dfsg-2.1build1 [14.6 kB] Get:7 http://archive.ubuntu.com/ubuntu impish/main amd64 libsasl2-2 amd64 2.1.27+dfsg-2.1build1 [46.1 kB] Get:8 http://archive.ubuntu.com/ubuntu impish/main amd64 libldap-2.5-0 amd64 2.5.6+dfsg-1~exp1ubuntu1 [186 kB] Get:9 http://archive.ubuntu.com/ubuntu impish/main amd64 libnghttp2-14 amd64 1.43.0-1 [72.5 kB] Get:10 http://archive.ubuntu.com/ubuntu impish/main amd64 librtmp1 amd64 2.4+20151223.gitfa8646d.1-2build2 [55.0 kB] Get:11 http://archive.ubuntu.com/ubuntu impish/main amd64 libssh-4 amd64 0.9.6-1 [185 kB] Get:12 http://archive.ubuntu.com/ubuntu impish/main amd64 libcurl4 amd64 7.74.0-1.3ubuntu2 [273 kB] Get:13 http://archive.ubuntu.com/ubuntu impish/main amd64 curl amd64 7.74.0-1.3ubuntu2 [179 kB] Get:14 http://archive.ubuntu.com/ubuntu impish/main amd64 libldap-common all 2.5.6+dfsg-1~exp1ubuntu1 [18.9 kB] Get:15 http://archive.ubuntu.com/ubuntu impish/main amd64 libsasl2-modules amd64 2.1.27+dfsg-2.1build1 [48.7 kB] Fetched 2322 kB in 5s (498 kB/s) debconf: delaying package configuration, since apt-utils is not installed Selecting previously unselected package openssl. (Reading database ... 4386 files and directories currently installed.) Preparing to unpack .../00-openssl_1.1.1l-1ubuntu1_amd64.deb ... Unpacking openssl (1.1.1l-1ubuntu1) ... Selecting previously unselected package ca-certificates. Preparing to unpack .../01-ca-certificates_20210119ubuntu1_all.deb ... Unpacking ca-certificates (20210119ubuntu1) ... Selecting previously unselected package libpsl5:amd64. Preparing to unpack .../02-libpsl5_0.21.0-1.2_amd64.deb ... Unpacking libpsl5:amd64 (0.21.0-1.2) ... Selecting previously unselected package publicsuffix. Preparing to unpack .../03-publicsuffix_20210108.1309-1_all.deb ... Unpacking publicsuffix (20210108.1309-1) ... Selecting previously unselected package libbrotli1:amd64. Preparing to unpack .../04-libbrotli1_1.0.9-2build2_amd64.deb ... Unpacking libbrotli1:amd64 (1.0.9-2build2) ... Selecting previously unselected package libsasl2-modules-db:amd64. Preparing to unpack .../05-libsasl2-modules-db_2.1.27+dfsg-2.1build1_amd64.deb ... Unpacking libsasl2-modules-db:amd64 (2.1.27+dfsg-2.1build1) ... Selecting previously unselected package libsasl2-2:amd64. Preparing to unpack .../06-libsasl2-2_2.1.27+dfsg-2.1build1_amd64.deb ... Unpacking libsasl2-2:amd64 (2.1.27+dfsg-2.1build1) ... Selecting previously unselected package libldap-2.5-0:amd64. Preparing to unpack .../07-libldap-2.5-0_2.5.6+dfsg-1~exp1ubuntu1_amd64.deb ... Unpacking libldap-2.5-0:amd64 (2.5.6+dfsg-1~exp1ubuntu1) ... Selecting previously unselected package libnghttp2-14:amd64. Preparing to unpack .../08-libnghttp2-14_1.43.0-1_amd64.deb ... Unpacking libnghttp2-14:amd64 (1.43.0-1) ... Selecting previously unselected package librtmp1:amd64. Preparing to unpack .../09-librtmp1_2.4+20151223.gitfa8646d.1-2build2_amd64.deb ... Unpacking librtmp1:amd64 (2.4+20151223.gitfa8646d.1-2build2) ... Selecting previously unselected package libssh-4:amd64. Preparing to unpack .../10-libssh-4_0.9.6-1_amd64.deb ... Unpacking libssh-4:amd64 (0.9.6-1) ... Selecting previously unselected package libcurl4:amd64. Preparing to unpack .../11-libcurl4_7.74.0-1.3ubuntu2_amd64.deb ... Unpacking libcurl4:amd64 (7.74.0-1.3ubuntu2) ... Selecting previously unselected package curl. Preparing to unpack .../12-curl_7.74.0-1.3ubuntu2_amd64.deb ... Unpacking curl (7.74.0-1.3ubuntu2) ... Selecting previously unselected package libldap-common. Preparing to unpack .../13-libldap-common_2.5.6+dfsg-1~exp1ubuntu1_all.deb ... Unpacking libldap-common (2.5.6+dfsg-1~exp1ubuntu1) ... Selecting previously unselected package libsasl2-modules:amd64. Preparing to unpack .../14-libsasl2-modules_2.1.27+dfsg-2.1build1_amd64.deb ... Unpacking libsasl2-modules:amd64 (2.1.27+dfsg-2.1build1) ... Setting up libpsl5:amd64 (0.21.0-1.2) ... Setting up libbrotli1:amd64 (1.0.9-2build2) ... Setting up libsasl2-modules:amd64 (2.1.27+dfsg-2.1build1) ... Setting up libnghttp2-14:amd64 (1.43.0-1) ... Setting up libldap-common (2.5.6+dfsg-1~exp1ubuntu1) ... Setting up libsasl2-modules-db:amd64 (2.1.27+dfsg-2.1build1) ... Setting up librtmp1:amd64 (2.4+20151223.gitfa8646d.1-2build2) ... Setting up libsasl2-2:amd64 (2.1.27+dfsg-2.1build1) ... Setting up libssh-4:amd64 (0.9.6-1) ... Setting up openssl (1.1.1l-1ubuntu1) ... Setting up publicsuffix (20210108.1309-1) ... Setting up libldap-2.5-0:amd64 (2.5.6+dfsg-1~exp1ubuntu1) ... Setting up ca-certificates (20210119ubuntu1) ... debconf: unable to initialize frontend: Dialog debconf: (No usable dialog-like program is installed, so the dialog based frontend cannot be used. at /usr/share/perl5/Debconf/FrontEnd/Dialog.pm line 78.) debconf: falling back to frontend: Readline debconf: unable to initialize frontend: Readline debconf: (Can't locate Term/ReadLine.pm in @INC (you may need to install the Term::ReadLine module) (@INC contains: /etc/perl /usr/local/lib/x86_64-linux-gnu/perl/5.32.1 /usr/local/share/perl/5.32.1 /usr/lib/x86_64-linux-gnu/perl5/5.32 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl-base /usr/lib/x86_64-linux-gnu/perl/5.32 /usr/share/perl/5.32 /usr/local/lib/site_perl) at /usr/share/perl5/Debconf/FrontEnd/Readline.pm line 7.) debconf: falling back to frontend: Teletype Updating certificates in /etc/ssl/certs... 128 added, 0 removed; done. Setting up libcurl4:amd64 (7.74.0-1.3ubuntu2) ... Setting up curl (7.74.0-1.3ubuntu2) ... Processing triggers for libc-bin (2.34-0ubuntu2) ... Processing triggers for ca-certificates (20210119ubuntu1) ... Updating certificates in /etc/ssl/certs... 0 added, 0 removed; done. Running hooks in /etc/ca-certificates/update.d... done. E: Problem executing scripts DPkg::Post-Invoke 'rm -f /var/cache/apt/archives/*.deb /var/cache/apt/archives/partial/*.deb /var/cache/apt/*.bin || true' E: Sub-process returned an error code # curl https://bing.com curl: (6) getaddrinfo() thread failed to start All the best, Thomas.