You are right. There was some thing wrong with python-minimal. After reinstallation deja-dup started backup. Thanks.
Is it possible that one of the python patches had pemoved link to python2? Now it has proper link. unim95@ubuntu-BitFenix-Prodigy:~$ ll /usr/bin/python2 lrwxrwxrwx 1 root root 9 апр 16 2018 /usr/bin/python2 -> python2.7* -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to python-defaults in Ubuntu. https://bugs.launchpad.net/bugs/1871763 Title: Duplicity is not working Status in Duplicity: New Status in python-defaults package in Ubuntu: New Bug description: Duplicity is failing to make backup. It produces error message: see attached 000_Error_message.png After starting duplicity from terminal, I got much better error message: unim95@ubuntu-BitFenix-Prodigy:~$ duplicity bash: /usr/bin/duplicity: /usr/bin/python2: bad interpreter: No such file or directory After searching system for python2 i found, that there is no python2 executable unim95@ubuntu-BitFenix-Prodigy:~$ locate python2 | grep -v lib | grep -v man | grep -v doc | grep -v include /etc/python2.7 /etc/python2.7/sitecustomize.py /snap/core/8689/usr/share/bash-completion/completions/python2 /snap/core/8689/usr/share/dh-python/dh_python2 /snap/core/8689/usr/share/dh-python/dist/cpython2_fallback /snap/core/8935/usr/share/bash-completion/completions/python2 /snap/core/8935/usr/share/dh-python/dh_python2 /snap/core/8935/usr/share/dh-python/dist/cpython2_fallback /usr/bin/python2-futurize /usr/bin/python2-pasteurize /usr/bin/python2.7 /usr/bin/python2.7-config /usr/bin/waitress-serve-python2 /usr/bin/x86_64-linux-gnu-python2.7-config /usr/share/app-install/desktop/idle-python2.7:idle-python2.7.desktop /usr/share/applications/python2.7.desktop /usr/share/bash-completion/completions/python2 /usr/share/binfmts/python2.7 /usr/share/dh-python/dh_python2 /usr/share/dh-python/dist/cpython2_fallback /usr/share/lintian/overrides/python2.7 /usr/share/lintian/overrides/python2.7-minimal /usr/share/pixmaps/python2.7.xpm Default python is: unim95@ubuntu-BitFenix-Prodigy:~$ python --version Python 2.7.17 Duplicity version: unim95@ubuntu-BitFenix-Prodigy:~$ dpkg -s duplicity Package: duplicity Status: install ok installed Priority: optional Section: utils Installed-Size: 1064 Maintainer: Ubuntu Developers <ubuntu-devel-disc...@lists.ubuntu.com> Architecture: amd64 Version: 0.7.17-0ubuntu1.1 Depends: libc6 (>= 2.4), librsync1 (>= 0.9.6), python (<< 2.8), python (>= 2.7~), python-fasteners, python:any (<< 2.8), python:any (>= 2.7.5-5~), python-lockfile (>> 1:0.9), gnupg | gnupg1 Suggests: rsync, python-paramiko, python-pexpect, python-urllib3, python-oauthlib, python-boto, ncftp, python-cloudfiles, lftp, python-gdata, tahoe-lafs, python-swiftclient Description: encrypted bandwidth-efficient backup Duplicity backs directories by producing encrypted tar-format volumes and uploading them to a remote or local file server. Because duplicity uses librsync, the incremental archives are space efficient and only record the parts of files that have changed since the last backup. Because duplicity uses GnuPG to encrypt and/or sign these archives, they will be safe from spying and/or modification by the server. Homepage: http://duplicity.nongnu.org/ Original-Maintainer: Alexander Zangerl <a...@debian.org> Python2 version: unim95@ubuntu-BitFenix-Prodigy:~$ dpkg -s python Package: python Status: install ok installed Priority: optional Section: python Installed-Size: 624 Maintainer: Ubuntu Developers <ubuntu-devel-disc...@lists.ubuntu.com> Architecture: amd64 Multi-Arch: allowed Source: python-defaults Version: 2.7.15~rc1-1 Replaces: python-dev (<< 2.6.5-2) Provides: python-ctypes, python-email, python-importlib, python-profiler, python-wsgiref Depends: python2.7 (>= 2.7.15~rc1-1~), libpython-stdlib (= 2.7.15~rc1-1) Pre-Depends: python-minimal (= 2.7.15~rc1-1) Suggests: python-doc (= 2.7.15~rc1-1), python-tk (>= 2.7.15~rc1-1~) Breaks: update-manager-core (<< 0.200.5-2) Conflicts: python-central (<< 0.5.5) Description: interactive high-level object-oriented language (default version) Python, the high-level, interactive object oriented language, includes an extensive class library with lots of goodies for network programming, system administration, sounds and graphics. . This package is a dependency package, which depends on Debian's default Python version (currently v2.7). Original-Maintainer: Matthias Klose <d...@debian.org> Homepage: http://www.python.org/ Cnf-Extra-Commands: python Cnf-Priority-Bonus: 3 OS: unim95@ubuntu-BitFenix-Prodigy:~$ cat /etc/os-release NAME="Ubuntu" VERSION="18.04.4 LTS (Bionic Beaver)" ID=ubuntu ID_LIKE=debian PRETTY_NAME="Ubuntu 18.04.4 LTS" VERSION_ID="18.04" HOME_URL="https://www.ubuntu.com/"; SUPPORT_URL="https://help.ubuntu.com/"; BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"; PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"; VERSION_CODENAME=bionic UBUNTU_CODENAME=bionic FS used: ext4. 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