(D)DoS Deflate is a lightweight bash shell script designed to assist in the process of blocking a denial of service attack. It utilizes the command below to create a list of IP addresses connected to the server, along with their total number of connections. It is one of the simplest and easiest to install solutions…

From backwardcompatible.net I have a heavy-used website powered by LAMP stack (CentOS Linux, Apache 2, MySQL and PHP). It started on a shared hosting so I had to use MySQL. Year and a half later, I switched shared, virtual hosting and not run it on a dedicated server. I decided to try Firebird to see…

From thoughtsbyclayg.blogspot.com how to delete last command from bash history If you have ever typed something into a command prompt that you wished you hadn’t – you may find it useful to know that you can delete it from ~/.bash_history very easily. The command: history -d offset will delete the history entry at position offset….

socket bind() to port 25 for address (any IPv4) failed: Address already in use If you get this error message: socket bind() to port 25 for address (any IPv4) failed: Address already in use: waiting 30s before trying again (6 more tries) …. That means there is already a smtp program listening on Port 25….

From gnode.net cPanel’s new securetmp script is handy to prevent users from executing malicious code in /tmp or /var/tmp but if your software is like a lot out there and doesn’t have any garbage collection, you’ll find your /tmp partition filling up quickly. By default, cPanel’s script uses a limit of 512MB, and for those…

UPDATE: The one-liner below still works as of 7/23/15 on CENTOS 5.8 x86_64 WHM 11.50.0 (build 27). Will be testing shortly on CENT7 To create all accounts backup on your server, execute following command for backup in `\ls /var/cpanel/users/`; do echo /scripts/pkgacct $backup; done Run it the first time to see what it is going…