Because I’m a nice guy I will share this command with you:

[me@it ~]# yum install php-imap

Now it’s installed, proof:

[me@it ~]# php --ri imap
 
imap
 
IMAP c-Client Version => 2004
SSL Support => enabled
Kerberos Support => enabled
[me@it ~]#

If it wasn’t installed it would have shown you:

[me@it ~]# php --ri imap
Extension 'imap' not present.

But of course it isn’t working… yet, untill you restart the Apache server daemon

[me@it ~]# service httpd restart

And because I’m a nice guy I will tell you where I found the first command before even you ask: http://www.php.net/manual/en/imap.setup.php

The PHP manual is always a good place to start, oh… and don’t underestimate comments.

When I start vsftpd on my CentOs machine I get this error:

Starting vsftpd for vsftpd: 500 OOPS: unrecognised variable in config file:  anonymous_enable

How can I fix it?

Answer

The option “anonymous_enable” is a valid vsftpd option, but as you can see on the error message, there is an extra white space before the variable definition, I suspect that the line was there, commented, and that when you uncommented it you forgot to remove the white space after the “#”, check your vsftpd.conf file make sure that “anonymous_enable=YES” or “anonymous_enable=NO” stands on a single line without any preceding spaces then start vsftpd:

service vsftpd start

First we have to update all the packages installed:

$ sudo apt-get update
$ sudo apt-get upgrade

Now we make sure that we have the update-manager-core package installed with:

sudo apt-get install update-manager-core

Then we start the upgrade

sudo do-release-upgrade

In order to install PHP 5.2.6 you can add the CentOS testing repository and enable it then install or update PHP.

To add the CentOS testing directory, create a file /etc/yum.repos.d/centos-test.repo and add this line:

[c5-testing]
name=CentOS-5 Testing
baseurl=http://dev.centos.org/centos/5/testing/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://dev.centos.org/centos/RPM-GPG-KEY-CentOS-testing


Then install or update PHP:

[root@server ~]# yum install php

or

[root@server ~]# yum update php

Then you can disable the testing repo by editing the file and setting the option “enabled” to “0″

[c5-testing]
name=CentOS-5 Testing
baseurl=http://dev.centos.org/centos/5/testing/$basearch/
enabled=0
gpgcheck=1
gpgkey=http://dev.centos.org/centos/RPM-GPG-KEY-CentOS-testing


What is .chm

Wikipedia says:

Microsoft Compiled HTML Help is a proprietary format for online help files, developed by Microsoft and first released in 1997 as a successor to the Microsoft WinHelp format. It was first introduced with the release of Windows 98, and is still supported and distributed through Windows XP and Vista platforms.

Install Xchm

The default installation of Ubuntu doesn’t include any reader for CHM help files, but you can add one easily.

I personally prefer Xchm which is lightweight and very user friendly, here is the command to install it:

user@computer:~$ sudo apt-get install xchm

You may be asked to enter your password.

Set default application

Now you need to associate files with the .chm extension with Xchm, so next time when you (double)click  a CHM help file, it will automatically open it in  Xchm:

• Right-click on any file with the .chm extension then click “Properties”
• Select the “Open With” tab and click “+ Add”
• Choose xchm and click “Add
  (!) Hint: if you can’t find xchm easily, type it on your keyboard and it will be highlighted

Demo

Here’s a screenshot of what Xchm looks like