Package: sudo Version: 1.8.21-1 Followup-For: Bug #873623 This is likely sssd related.
I upgraded both today (sssd to 1.15.3-1) and "sudo ls" output was empty. Local workaround was to comment out "sss" on /etc/nsswitch.conf "sudoers:" sudoers: files sss to sudoers: files #sss Hinted from "pkexec strace -f sudo ls" output: connect(4, {sa_family=AF_UNIX, sun_path="/var/lib/sss/pipes/sudo"}, 110) = -1 ECONNREFUSED (Connection refused) Best regards, Alban -- System Information: Debian Release: buster/sid APT prefers unstable-debug APT policy: (500, 'unstable-debug'), (500, 'unstable'), (500, 'stable'), (1, 'experimental-debug'), (1, 'experimental') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 4.11.0-2-amd64 (SMP w/4 CPU cores) Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8), LANGUAGE=fr_FR.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages sudo depends on: ii libaudit1 1:2.7.7-1+b2 ii libc6 2.24-17 ii libpam-modules 1.1.8-3.6 ii libpam0g 1.1.8-3.6 ii libselinux1 2.6-3+b2 ii lsb-base 9.20170808 sudo recommends no packages. sudo suggests no packages. -- Configuration Files: /etc/sudoers [Errno 13] Permission non accordée: '/etc/sudoers' /etc/sudoers.d/README [Errno 13] Permission non accordée: '/etc/sudoers.d/README' -- no debconf information