sandip's blog

The "mirror" command is all you need to copy/mirror a site with lftp:

Here's a one liner:

I tried:

It would come up with:

but exit without playing the tracks.

Track 1 also failed to play, however track 2 did playback the video.

Recently a particular folder in a site started coming up with blank php pages and the root cause being Segmentation fault after memory exhaustion. The subfolder contents would only come up after doing a restart of apache.

So something tried to access a region of memory that it did not have rights to. May be due to either bad RAM, or a code problem.

My first instinct was eAccelerator as I had done a recent php update and had not re-compiled it.

I still had the same issue the next day and bumped up the memory_limit from 16M to 32M in php.ini and from 32M to 64M in eaccelerator.ini .

Recently did a full server migration with ISPConfig installed. Luckily it was within the same distro but an updated version of CentOS-4.5, had to add centos-4.5 support to ispconfig conf file prior to the install. I also made sure that I was installing the same version of ISPConfig on the new server, and upgrading to the latest once the migration was complete and the server stable.

These are just notes I took down for later reference, just in case it happens again!!

Preparation:

In preparation for the migration, create A records to point to the new server IP, for all domains to do temporary redirection:

I'm not sure if was related to a hacking attempt. I came across a folder in the root directory / that I could not open or delete, with just tabs for the name which even the `find -inum` command was transparent to.

I did finally get rid of it by using zsh for shell and tabbing through all the files in the root directory.

When starting sendmail, I would get the below messgage:

Although, sendmail would still run without the CRL File and just complain about it missing. A quick way to include it in the sendmail configuration is to download revoke.crl from cacert.org, add the below option in sendmail.mc and rebuild the sendmail conf file as below.

Download revoke.crl:

Add the below line to "/etc/mail/sendmail.mc" just below the "confSERVER_KEY":

Rebuild sendmail conf by running make:

Check sendmail.cf with the revoke.crl listed as below:

Now restarting sendmail should not complain about the missing Certificate Revocation List (CRL) File.

I converted root filesystem to lvm since the root partition was huge and I needed more flexibility in managing the partitions. Besides, lvm would also enable for easy backups with lvm snapshots.

I had a sizable swap partition of 2GB which I used to transfer my root files to and rebooted to it, prior to the conversion.

Please know what you are doing prior and make sure to create backups.

1. Edit "/var/qmail/mailnames/{domain.tld}/.qmail-default"
   
2. Remove any lines in the file and add the pipe to file:
   
   | /var/www/vhosts/{domain.tld}/file.php
3. Change the file permission to be executable and owned by the correct user/group of the site, specially if you are executing under safe_mode.
   
   $ chmod 755 /var/www/vhosts/{domain.tld}/file.php
4. Check to make sure that "/var/qmail/control/rejectnonexist" does not have the corresponding domain listed there.
   
5. Restart qmail.

Recently built an rpm for a client that needed to install nsis-2.29 on several redhat boxes. nsis-2.28 for centos/fedora is readily available at repo.calcforge.org .

I downloaded the centos source rpm and rebuilt it for redhat4 as described below:

I've had php4 running with apache2 for a while now and wanted to get php5 also simultaneously running. There are other ways to do this, but I opted with getting php5 to run as fastcgi and keep php4 as apache2 module so they can co-exist together.

This was done on CentOS release 4.5 with ISPConfig Control Panel on a dedicated hosting scenario. If you're looking to share the server with others then you might want to set up with suphp/SuExec for security purposes.