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Thomas Howard Uphill

I am a System Administrator/Manager at an Educational Institution (IAS) in Princeton New Jersey but not actually Princeton University a lot of people make that mistake. I hope to post here a few things that may be useful under some rather bizarre set of circumstances.

Famous last words

"Unless you can present a solution, I don't think it's a problem" - November 11, 2004

"Updates usually go very well" - September 9, 2006

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gnarwl vacation schema with 389

I'm in the process of setting up gnarwl with our 389 (fedora directory server) and needed to import the vacation attributes and objectclass into 389. I only added the attributes I needed for vacation from the included ISP schema file.

Here is the ldif for putting into /etc/dirsrv/[instance]/schema:

dn: cn=schema
attributeTypes: (
  1.3.6.1.4.1.11048.1.1.1.1

Horde ingo with dovecot sieve doesn't connect

This is just a case of RTFM but I thought I'd share...

nsswitch.conf hosts lookup from ldap on puias6 (RHEL6/CENTOS6) nslcd

We store our host information in ldap. Previously using ldap for host lookups was done by adding the appropriate entries to /etc/ldap.conf and changing nsswitch.conf.

With 6, nss_ldap has been replaced by nslcd, so I needed to change our setup a little.
I put the following into nslcd.conf

uid nslcd
gid ldap
uri ldap://ldap2.example.com

gethostbyname example that compiles and runs clean on puias6

While playing around with getting host entries to work with ldap, I found that my previous code for using gethostbyname was not running clean on puias6. Here is an updated version

#include <stdio.h>
#include <netdb.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
 
 
int main(int argc, char **argv) {
	int i;

Using previous command arguments in a new line

A friend of mine was talking about his design for a shell that would allow you to programatically reuse arguments. I started looking and found that bash can do this but not programatically (at least as far as I know).

horde 4 imp 5 uw-imap mail issues (Unknown Date, Invalid Address, Error communicating with server ajax_error, etc...)

After upgrading to horde 4.0.8 and imp 5.0.9 a few users had issues reading email. There were some messages missing, or for some users no messages at all.

finding the biggest subdirectories of the current directory

There's probably an easier way to do this, but I just put this in my aliases and it works well enough.

alias fl='(for file in `find .??* * -maxdepth 0 -type d`; do du -hs $file 2>/dev/null; done) |sort -h -k 1'

Replication stopped Consumer failed to replay change redhat-ds/fedora-ds/389

One of our ldap seconaries was failing to stay in sync with the main server. We kept getting "Consumer failed to replay change" in the error log. The uniqueid and CSN were always the same, so at first I thought it was specific to the record that was being propogated.

Bluetooth keyboard on nookcolor (cyanogen)

After putting cyanogen on my nookcolor, I wanted to try out a bluetooth keyboard. I borrowed an Apple keyboard from a friend and started playing. Initially I paired and it looked like it was going to work right out of the box but...

X11 forwarding with ssh to a system with AFP/CIFS home directories (xauth fails)

I had a user come to me saying they couldn't forward X11 from their home institution to us. I watched them logged in and noticed that xauth was complaining it couldn't lock files. I looked a little deeper and it was that xauth creates a temporary file, then hardlinks to .Xauthority. The problem is that this remote system uses CIFS for home directories (weird huh?).

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