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Re: sudo slow on DNS lookup, with invalid resolv.conf entries

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On Mon 18 Sep 2017 at 06:32:55 -0300, x9p wrote:

(Please watch your attributioms; it confuses matters. x9p did not write
this).

> > This is the default from the last stretch install
> >
> > $ cat /etc/hosts
> > 127.0.0.1       localhost
> > 127.0.1.1       fujitsu.mydomain    fujitsu
> >
> > so if mydomain or localdomain is not working it will delay.
> >
> > 127.0.1.1       fujitsu fujitsu.mydomain
> >
> > will not delay because fujitsu is the name of the machine.
> >
> > in my case mydomain was added at installation time, because cable was
> > plugged in and the computer (fujitsu) got its IP via the dhcp server on
> > the
> > local network.
> >
> > IMO you should look deeper in your use case and see why you get invalid
> > setup. The problem might be somewhere else.
> >
> > regards
> 
> My chosen machine name was "localhost", problem partially lies here.

The hosts manual says each host should have a line like

  IP_address canonical_hostname [aliases...]

By implication the catonical_hostname should be for one IP_address. You
have (had?)

  root@localhost:~# grep localhost /etc/hosts
  127.0.0.1       localhost
  127.0.1.1       localhost

The first line is ok; the canonical_hostname localhost has the address
127.0.0.1. The second line is not ok.

The file /etc/hostname has the system hostname; it should not be
"localhost". If it was "stretch" then the second line should be

  127.0.1.1       stretch

(This becomes a little more complicated if a mail server is one of the
services being run on the machine).

-- 
Brian.

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Re: sudo slow on DNS lookup, with invalid resolv.conf entries "x9p" <debian-user@x9pneu.com> - 2017-09-18 01:50 +0200
  Re: sudo slow on DNS lookup, with invalid resolv.conf entries deloptes <deloptes@gmail.com> - 2017-09-18 09:10 +0200
    Re: sudo slow on DNS lookup, with invalid resolv.conf entries "x9p" <debian-user@x9pneu.com> - 2017-09-18 11:40 +0200
      Re: sudo slow on DNS lookup, with invalid resolv.conf entries Curt <curty@free.fr> - 2017-09-18 13:40 +0200
        Re: sudo slow on DNS lookup, with invalid resolv.conf entries Greg Wooledge <wooledg@eeg.ccf.org> - 2017-09-18 16:00 +0200
          Re: sudo slow on DNS lookup, with invalid resolv.conf entries Curt <curty@free.fr> - 2017-09-18 16:40 +0200
        Re: sudo slow on DNS lookup, with invalid resolv.conf entries "x9p" <debian-user@x9pneu.com> - 2017-09-18 17:30 +0200
          Re: sudo slow on DNS lookup, with invalid resolv.conf entries Brian <ad44@cityscape.co.uk> - 2017-09-18 18:10 +0200
            Re: sudo slow on DNS lookup, with invalid resolv.conf entries "x9p" <debian-user@x9pneu.com> - 2017-09-18 20:50 +0200
              Re: sudo slow on DNS lookup, with invalid resolv.conf entries Brian <ad44@cityscape.co.uk> - 2017-09-18 21:10 +0200
      Re: sudo slow on DNS lookup, with invalid resolv.conf entries Brian <ad44@cityscape.co.uk> - 2017-09-18 14:40 +0200

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