Posts Tagged "Linux"

Google OS is taking it to Microsoft’s Playground…

Posted by marcus on Jul 8, 2009 in Other | Comments Off

Wow… I joked about this day coming, and here it is!

Google announced today about plans to develop it’s own operating system, Google Chrome OS, based on the Linux kernel and boasting promises of speed, simplicity and security. Oh, and it’ll also be open source.

Linux Commands : Argument list too long

Posted by marcus on Mar 26, 2009 in Linux | Comments Off

There may come a time where you try to run a command on many files in a folder and you’ll get this annoying message similar to this:

-bash: //bin/chown: Argument list too long

The reason for this annoyance is that Linux kernel has a limitation of bytes it can process through as arguments in exec() commands. Try:

[root@x folder]# egrep ARG_MAX /usr/include/linux/limits.h
#define ARG_MAX 131072 /* # bytes of args + environ for exec() */


And you’ll see what I mean.

Installing memcache for PHP 5 on Linux CentOS

Posted by marcus on Mar 20, 2009 in PHP | Comments Off

This has been tested on CentOS but should work on most distros:

Memcache is a caching mechanism for PHP which speeds up access to data by storing it in the RAM. Memcache runs as a server in a similar fashion to a database, except that data is not persistent in the long term. The great thing about Memcache is you don’t need to recompile php. Here’s some instructions on how to install and set it up.

Filter spam to a folder with procmail and qmail

Posted by marcus on Feb 25, 2009 in Mail | 33 comments

This post is inspired by Russ Whittmann and Europheus’ solutions , with these goals/improvements in mind:

• Move spam marked by spamassassin into a special Spam folder in each account (flabergasted this isn’t standard on something like PLESK!)
• Allow for quota, which is available on some PLESK servers (I previously thought it was available on all servers until recently) .
• Make a solution with as minimal manual labour as possible outside the PLESK control panel, which relates most specifically to having to edit and create .qmail and .procmailrc files each time you change or add an email account.
• Avoid having to have a special .procmailrc file for every user, one recipe for all!

Queue management with qmail/plesk

Posted by marcus on Feb 6, 2009 in Mail | 2 comments

Here’s some handy tips for managing your qmail queue on a linux machine, which can be helpful for debugging: