Clearing the buffers and caches on Linux.
I have been playing around with a couple of modules and monitoring their memory usage. I wanted to clear the caches and buffers to give […]
What hard drives are in my Perc Raid Array
I had a client who ordered a new server for me to configure. The memory was not what was ordered so I checked out all […]
Plesk 12 Mailman relaying denied
If you get “relay access denied” error messages on mailman and mailman messages are not going out then check to see if you have ::1/128‘ […]
Server Migration DNS Propagation Solution
I have used this technique for a few years now so thought I should post it here as it doesn’t appear to break. Please note: […]
Cannot save sent message or Postfix permission problems.
I started getting a “couldn’t save sent message” error message in thunderbird. I logged onto the server and restarted courier-imapd and postfix and retried. Still […]
How to find the biggest files or directories on the server?
Just had a client call me due to the fact all the sites on his server were down. A quick check on disk space and […]
The GPG keys listed for the “CentOS / Red Hat Enterprise Linux 6 – atomicrocketturtle.com” repository are already installed but they are not correct for this package.
Atomic are moving everything under one key. To fix this error run this command;
Logging from to and subject in postfix
We needed to analyse the from, to and subject on one of our servers to deal with a persistent spammer. Add this to your header_checks […]
Blocking a spammer with firewall on a fresh chain.
A client uses fail2ban plus a number of other custom scripts to build his firewall to block unwanted access. The firewall table was getting very […]
Tracking which account is sending spam on a plesk server
This is not an easy task without knowing a few tricks as the log files are not an awful lot of help. Providing you have […]