1

I got this error during the installation of 2 packages.

root@blackbox:~# apt-get install mpack ssmtp
Reading package lists... Done
Building dependency tree
Reading state information... Done
mpack is already the newest version.
ssmtp is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
2 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] Y
Setting up ssmtp (2.64-8) ...
hostname: Name or service not known
dpkg: error processing package ssmtp (--configure):
 subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of mailutils:
 mailutils depends on default-mta | mail-transport-agent; however:
  Package default-mta is not installed.
  Package mail-transport-agent is not installed.
  Package ssmtp which provides mail-transport-agent is not configured yet.

dpkg: error processing package mailutils (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 ssmtp
 mailutils
E: Sub-process /usr/bin/dpkg returned an error code (1)
root@blackbox:~#
3

The problem is that the value entered in /etc/hostname doesn't match any entries in /etc/hosts.

This causes the command hostname --fqdn to return an unresolvable hostname, which results in ssmtp not installing.

Make sure you add your machine's hostname to /etc/hosts.

Related bugs:

0

These seems bad:

hostname: Name or service not known
dpkg: error processing package ssmtp (--configure):
 subprocess installed post-installation script returned error exit status 1

hostname used in script postinst (describe in Debian guide for packages maintainers - link) is failing.

As I checked mentioned package ssmtp in version 2.64-8 (amd64) and it has following script:

#!/bin/sh

set -e

if test -L /usr/doc/ssmtp
then
    rm -f /usr/doc/ssmtp 2>/dev/null || true
fi

. /usr/share/debconf/confmodule

db_get ssmtp/root
root="$RET"

db_get ssmtp/mailhub
mailhub="${RET:-mail}"

db_get ssmtp/port
port="$RET"

db_get ssmtp/hostname
hostname="${RET:-`hostname --fqdn`}"

db_get ssmtp/rewritedomain
rewritedomain="$RET"

if test -s /etc/mailname
then
    :
else
    test -n "$hostname" && MailName="$hostname"
    test -n "$rewritedomain" && MailName="$rewritedomain"

    touch /etc/mailname
    chmod 644 /etc/mailname
    echo "$MailName" > /etc/mailname
fi

db_get ssmtp/fromoverride
test "$RET" = "true" && FromOverride=YES

test -d /etc/ssmtp || exit 1

if test -s /etc/ssmtp/ssmtp.conf
then
    if test "$port" = "25" -o -z "$port"
    then
        :
    else
        mailhub=${mailhub}:$port
    fi
    test -z "$FromOverride" && FromOverride=NO

    touch /etc/ssmtp/ssmtp.conf.tmp
    chmod 644 /etc/ssmtp/ssmtp.conf.tmp

    sed "s/^root=.*/root=$root/;s/^mailhub=.*/mailhub=$mailhub/;s/^rewriteDomain=.*/rewriteDomain=$rewritedomain/;s/^hostname=.*/hostname=$hostname/;s/^FromLineOverride=.*/FromLineOverride=$FromOverride/;s/^#FromLineOverride=.*/FromLineOverride=$FromOverride/" /etc/ssmtp/ssmtp.conf > /etc/ssmtp/ssmtp.conf.tmp
    mv -f /etc/ssmtp/ssmtp.conf.tmp /etc/ssmtp/ssmtp.conf
else
    touch /etc/ssmtp/ssmtp.conf
    chmod 644 /etc/ssmtp/ssmtp.conf

    exec 1>/etc/ssmtp/ssmtp.conf

    echo "#"
    echo "# Config file for sSMTP sendmail"
    echo "#"
    echo "# The person who gets all mail for userids < 1000"
    echo "# Make this empty to disable rewriting."
    echo "root=$root"
    echo
    echo "# The place where the mail goes. The actual machine name is required no "
    echo "# MX records are consulted. Commonly mailhosts are named mail.domain.com"
    if test "$port" = "25" -o -z "$port"
    then
        echo "mailhub=$mailhub"
    else
        echo "mailhub=${mailhub}:$port"
    fi
    echo
    echo "# Where will the mail seem to come from?"
    test -z "$rewritedomain" && echo -n "#"
    echo "rewriteDomain=$rewritedomain"
    echo ""
    echo "# The full hostname"
    echo "hostname=$hostname"
    echo
    echo "# Are users allowed to set their own From: address?"
    echo "# YES - Allow the user to specify their own From: address"
    echo "# NO - Use the system generated From: address"
    test -z "$FromOverride" && echo -n "#"
    echo "FromLineOverride=YES"
fi

# Program End
exit 0

The most important is:

hostname="${RET:-`hostname --fqdn`}"

As it was mentioned hostname --fqdn failed. Please check it if:

  • command exists
  • what command hostname --fqdn return
  • This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post. - From Review – jasonwryan Feb 16 '16 at 22:41
  • @jasonwryan post improved. – Pawel Feb 17 '16 at 21:08

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.