Try this. If you have access to your wireless AP or router and is able to change the Wireless Security Mode, try switching to another mode i.e. from WEP to WPA or vice versa. If other devices relies on the currently set mode, switch once, let AirPort authenticate and grab an IP, turn AirPort off, switch back your router security mode and then turn on AirPort again.

Hope this helps.

CREATE TABLE `stories` (
`id` INT NOT NULL AUTO_INCREMENT PRIMARY KEY ,
`title` VARCHAR( 255 ) NOT NULL ,
`text` TEXT NOT NULL ,
`creationdate` DATETIME NOT NULL ,
`lastupdate` TIMESTAMP ON UPDATE CURRENT_TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
) ENGINE = MYISAM

When you want to store stories, you would also want to record when it was originally created as well track the last time it was updated. The problem here is that adding a `DEFAULT NOW()` clause will not work for the `CREATE TABLE` query above as it is not supported. So when your insert a new story you will have to explicitly add a `NOW()` function for the `creationdate` row so it will reflect the current date as creation date. This should’ve been a simple schema functionality, turns out after more than a year MySQL seems to ignore for some reason.

Go on have yourself a read here http://bugs.mysql.com/bug.php?id=27645

How about you, how many times have you have to work around this from your application code?

Here are the steps that I had to do:

1. Modify /etc/exports file to include directories you want shared. Ours look something like this:

   /usr/home/web01/images /usr/home/web01/swf    192.168.0.4
   

   Notice the two consecutive directories. From the man pages, when mounting two directories from the same mountpoint or filesystem it will go the same line on the exports file or you’ll get errors like:

   Dec  8 10:20:42 web01 mountd[5900]: can't change attributes for /usr/home/web01/swf    192.168.0.4
   Dec  8 10:20:42 web01 mountd[5900]: bad exports list line /usr/home/web01/swf    192.168.0.4
   

2. Restart service on the server. First stop, nfsd.

   /etc/rc.d/nfsd stop

   You have to make sure that mountd is stopped as well.

   /etc/rc.d/mountd forcestop

   Then kill rpcbind, I do this by finding the PID for rpcbind and killing it manually.

   ps aux|grep rpcbind

   It should return something like:

   root     6087  0.0  0.1  4776  1248  ??  Ss   10:28AM   0:00.01 rpcbind

   Then do the killing:

   kill -9 6087

   Then we start these processes in reverse order:

   rpcbind
   /etc/rc.d/nfsd start
   

   Starting nfsd should start mountd as well.

3. Verify your exports are properly listed

   showmount -e

   Should give you something like:

   Exports list on localhost:
   /usr/home/web01/images    192.168.0.4
   /usr/home/web01/swf    192.168.0.4
   

4. Now if you use hosts.allow and hosts.deny, make sure that the NFS client is allowed on the NFS services. We have these on our /etc/hosts.allow

   nfs : 192.168.0.4 : allow
   mountd : 192.168.0.4 : allow
   rpcbind : 192.168.0.4 : allow
   

5. Now, before mounting on or CentOS client machine we verify first wether the NFS exports are visible:

   rpcinfo -p 192.168.0.3

   You should get something like:

      program vers proto   port
       100000    4   tcp    111  portmapper
       100000    3   tcp    111  portmapper
       100000    2   tcp    111  portmapper
       100000    4   udp    111  portmapper
       100000    3   udp    111  portmapper
       100000    2   udp    111  portmapper
       100000    4     7    111  portmapper
       100000    3     7    111  portmapper
       100000    2     7    111  portmapper
       100005    1   udp    861  mountd
       100005    3   udp    861  mountd
       100005    1   tcp    767  mountd
       100005    3   tcp    767  mountd
       100003    2   udp   2049  nfs
       100003    3   udp   2049  nfs
       100003    2   tcp   2049  nfs
       100003    3   tcp   2049  nfs
   

6. So, our exports are visible we can now mount those shares.

   mount -t nfs 192.168.0.3:/usr/home/web01/images /usr/home/web02/images
   mount -t nfs 192.168.0.3:/usr/home/web01/swf /usr/home/web02/swf
   

7. That should do it, you should be able to see your mount points and browse files within them.

Questions welcome!