Fix mod_rewrite erros in apache

Posted by on March 12, 2009 No comments

change :


RewriteEngine On
RewriteCond %{REQUEST_METHOD} ^TRACE
RewriteRule .* – [F]

To this:


RewriteEngine On
RewriteCond %{REQUEST_METHOD} ^TRACE
RewriteRule .* – [F]
RewriteLog /var/log/apache2/rewrite.log
RewriteLogLevel 0

as described here

funny

Posted by on March 10, 2009 No comments

Dilbert.com

Centos5: nfs clients get premission denied

Posted by on February 18, 2009 No comments

While working on ny NFS cluster project , I could not mount my nfs exports from clients ( FreBSD & Centos ).

on the FreeBSD client I got these responses :
[udp] server:/data/dir1: Permission denied
on the CentOS client I got these responses:
mount: server:/data/dir1 failed, reason given by server: Permission denied

On the Centos NFS server the logs showed :
mountd[12377]: authenticated mount request from client1:984 for /data/dir1 (/data/dir1)

Turns out there’s a bug in CentOS and modprobe does not mount the nfsd procs , you can fix the issue by adding :

none /proc/fs/nfsd nfsd auto 0 0

to /etc/fstab
or manually ( if you want to make sure that is the issue ) :

/bin/mount -t nfsd nfsd /proc/fs/nfsd

Setup NTP on CentOS 5.2

Posted by on February 17, 2009 No comments

I am working on building a DRBD cluster and as with all cluster tools , you must have a synced time between nodes.

1. install ntp

yum -y install ntp

2. enable ntp on boot

chkconfig ntpd on

3.run a manual time sync before starting the service

ntpdate 0.pool.ntp.org

4. start the service

service ntpd start

find whats causing a busy partition in freebsd

Posted by on February 13, 2009 No comments

trying to umount an nfs or external disk partition and got “partition busy” ?
use fstat -f to find out what the hold up …

-f      Restrict examination to files open in the same file systems as
             the named file arguments, or to the file system containing the
             current directory if there are no additional filename arguments.
             For example, to find all files open in the file system where the
             directory /usr/src resides, type ``fstat -f /usr/src''.