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According to the log files: Adding new user `postfix' (UID 118) with group `postfix' ... useradd: cannot lock /etc/passwd; try again later. adduser: `/usr/sbin/useradd -d /var/spool/postfix -g postfix -s /bin/false -u 118 postfix' returned error code 1. Exiting. dpkg: error processing postfix (--configure): subprocess installed post-installation script returned error exit status 1 Setting up ntp (1:4.2.4p8+dfsg-1ubuntu2) ... useradd: cannot lock /etc/passwd; try again later. adduser: `/usr/sbin/useradd -d /home/ntp -g ntp -s /bin/false -u 118 ntp' returned error code 1. Exiting. chown: invalid user: `ntp:ntp' dpkg: error processing ntp (--configure): subprocess installed post-installation script returned error exit status 1 It seems that there is an issue adding the postfix group. Could you try to reinstall the package? ** Changed in: ntp (Ubuntu) Importance: Undecided => Low ** Changed in: ntp (Ubuntu) Status: New => Incomplete -- package ntp 1:4.2.4p8+dfsg-1ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1 https://bugs.launchpad.net/bugs/631324 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs