Update: Compiling XDR for NFSv4 on Linux

April 26th, 2014

For modern Fedora systems:

sudo yum install -y nfs-utils libtirpc-devel

seems to do the trick!

Getting static addresses in a Linux client under NAT and VMware Fusion

April 23rd, 2014

I had a client working fine enough with DHCP, but I really want to be able to
consistently ssh into it.

I looked at:

/Library/Preferences/VMware Fusion/vmnet8/dhcpd.conf

and determined that I did not have to modify it to get a static address:

allow unknown-clients;
default-lease-time 1800;                # default is 30 minutes
max-lease-time 7200;                    # default is 2 hours

subnet 172.16.249.0 netmask 255.255.255.0 {
        range 172.16.249.128 172.16.249.254;
        option broadcast-address 172.16.249.255;
        option domain-name-servers 172.16.249.2;
        option domain-name localdomain;
        default-lease-time 1800;                # default is 30 minutes
        max-lease-time 7200;                    # default is 2 hours
        option netbios-name-servers 172.16.249.2;
        option routers 172.16.249.2;
}
host vmnet8 {
        hardware ethernet 00:50:56:C0:00:08;
        fixed-address 172.16.249.1;
        option domain-name-servers 0.0.0.0;
        option domain-name "";
        option routers 0.0.0.0;
}

I.e., I could use addresses 172.16.249.2 -> 172.16.249.127 for static assignment. (There is a bug in that statement, which is why I am writing this down.)

I always skip the first 20 addresses, so I assigned:

KinSlayer:flexfiles loghyr$ more /private/etc/hosts
##
# Host Database
#
# localhost is used to configure the loopback interface
# when the system is booting.  Do not change this entry.
##
127.0.0.1       localhost
255.255.255.255 broadcasthost
::1             localhost 
fe80::1%lo0     localhost
172.16.249.1    kinslayer
172.16.249.21   skull
172.16.249.22   kitty

skull to be 172.16.249.21.

I modified skull’s /etc/sysconfig/network:

[root@skull linux]# more /etc/sysconfig/network
# Created by anaconda
HOSTNAME=skull

and /etc/sysconfig/network-scripts/ifcfg-eno16777736

[root@skull linux]# more /etc/sysconfig/network-scripts/ifcfg-eno16777736
TYPE="Ethernet"
BOOTPROTO="static"
DEFROUTE="yes"
IPV4_FAILURE_FATAL="no"
IPV6INIT="yes"
IPV6_AUTOCONF="yes"
IPV6_DEFROUTE="yes"
IPV6_PEERDNS="yes"
IPV6_PEERROUTES="yes"
IPV6_FAILURE_FATAL="no"
NAME="eno16777736"
UUID="3e93f225-d48a-4de0-919a-5ef5d1f428e7"
ONBOOT="yes"
HWADDR="00:0C:29:98:83:E7"
PEERDNS="yes"
PEERROUTES="yes"
DEVICE=eno16777736
NM_CONTROLLED=no
IPADDR=172.16.249.21
NETMASK=255.255.255.0
GATEWAY=172.16.249.1
DNS1=172.16.249.1

Disabled Network Mangler and turned on network:

service NetworkManager stop
chkconfig NetworkManager off
yum erase NetworkManager
service network start
chkconfig network on

I tested that I could ssh into and out of skull to my laptop. Fine, job done.

Only DNS wasn’t working the next day:

[root@skull linux]# more /etc/resolv.conf
# Generated by NetworkManager
domain localdomain
search localdomain
nameserver 172.16.249.1

I checked online, and found I should be using 172.16.249.2. Fine, job done.

Well then I couldn’t get to github.com port 22 to get a project update.

Push comes to shove, I should have not assumed that 172.16.249.1 is special
with this NAT. It is not the laptop as far as a DNS server and gateway is concerned.

So I changed this line in /etc/sysconfig/network-scripts/ifcfg-eno16777736:

GATEWAY=172.16.249.2

And restarted the network – now my DNS change was gone (why does service network restart add in the line about “# Generated by NetworkManager” to /etc/resolv.conf ??).

Fine, fixed this line as well:

DNS1=172.16.249.2

And restarted.

Now it all works, I think. :-)

Getting mail clients to work with domains at Gmail

April 21st, 2014

My work email is Thomas.Haynes@example.org and is actually maintained at gmail.com.

Both Mail.app and mutt have had a hard time configuring for it.

For Mail.app:

  1. Set it up as normal for a Google IMAP account.
  2. Then go to Mail -> Preferences, select the account.
  3. Then on the “Outgoing Mail Server (SMTP):”, select by left click the server
  4. and then “Edit SMTP Server List …”.
  5. Now, select the server again
  6. First you’ll want to change the “Description” to be “Example.org” (this is in the “Account Information”)
  7. Second you will want to select Advanced
  8. Third, change the “User Name:” from “First.Last@gmail.com” to be “First.Last@example.org”

It should work now

For mutt, I followed the directions at Consolify your Gmail with MUTT with the exception of the following line:

set smtp_url = "smtp://yourusername@smtp.gmail.com:587/"

I modified it to be:

set smtp_url = "smtp://First.Last@example.org@smtp.gmail.com:587/"

 

Installing xml2rfc on OSX

April 21st, 2014
curl -O https://raw.github.com/pypa/pip/master/contrib/get-pip.py
python get-pip.py
pip install xml2rfc

yields:

clang: error: unknown argument: '-mno-fused-madd' [-Wunused-command-line-argument-hard-error-in-future]

clang: note: this will be a hard error (cannot be downgraded to a warning) in the future

error: command 'cc' failed with exit status 1

So try:

curl -O https://raw.github.com/pypa/pip/master/contrib/get-pip.py
python get-pip.py
export CFLAGS=-Qunused-arguments
export CPPFLAGS=-Qunused-arguments
pip install xml2rfc

As partially documented here in Ansible Installation -clang: error: unknown argument: ‘-mno-fused-madd’.

And the crowd goes wild!

April 17th, 2014

RFC 7204

Pullme/Pushyou

April 17th, 2014

Different git Push & Pull(fetch) URLs suggests:

[remote "origin"]
 fetch = +refs/heads/*:refs/remotes/origin/*
 url = git://github.com/chief/global.git
 pushurl = git@github.com:User/forked.git

Quick hack to rename all prefixed files in a directory to a new prefix

April 13th, 2014

loghyr:xxx thomas$ ls -1 pnfswars* | sed ‘s/\(pnfswars\)\(.*\)/mv \1\2 lnfsreg\2/’ | sh

And to do this as a script:

loghyr:xxx thomas$ more reprefix.sh
#! /bin/sh
ls -1 ${1}* | sed ‘s/\(‘${1}’\)\(.*\)/mv \1\2 ‘${2}’\2/’ | sh

Configuring no-ip

September 5th, 2012

Working with Dynamic IP Address & Your Server

Can’t install a pkg anymore on Solaris 11

August 18th, 2012

If you get this:

root@reno:~# pkg install header-math
pkg: 0/1 catalogs successfully updated:

Unable to contact valid package repository
Encountered the following error(s):
Unable to contact any configured publishers.
This is likely a network configuration problem.
Framework error: code: 7 reason: Failed to connect to 137.254.56.21: Network is unreachable
URL: ‘http://pkg.oracle.com/solaris/release’. (happened 4 times)

Then go to Building a Solaris 11 repository without network connection which will remind you what to do!

Enable the postfix Mail Transfer Agent

May 7th, 2012

I want to use git’s mailing capabilities on OS X Lion to send out patches. How do I configure the MTA?

This Enable the postfix Mail Transfer Agent looks interesting, but old:

  loghyr:postfix root# head /etc/hostconfig 
  # This file is going away

But I think we can control all of this from the postfix(1).

  loghyr:postfix root# postconf -d | grep etc
  alias_database = hash:/etc/aliases
  alias_maps = hash:/etc/aliases
  config_directory = /etc/postfix
  sample_directory = /etc/postfix

I’m going to need a version for my home network and my vpn network:

loghyr:postfix root# cp main.cf home.cf
loghyr:postfix root# cp main.cf work.cf
loghyr:postfix root# cp main.cf default.cf

Edit the config files and start it:

loghyr:postfix root# cp work.cf main.cf
loghyr:postfix root# postfix start 
postfix/postfix-script: warning: group or other writable: /Library/Server/Mail/Data/mta
postfix/postfix-script: starting the Postfix mail system

How do I get it to stay launched? What’s the correctly way to make Postfix run permanently on Lion (not server)

I can switch my config files as needed.

Hmm, it works. I can’t show you, but it works.

The main thing I changed from the article I linked in was the relayhost:

relayhost = [mail.internal.excfb.com]

My setup assumes that I am connecting to an already working mail server in the domain. I.e., my iMac isn’t going to be receiving mail, just sending it.