WordPress error:The e-mail could not be sent.Possible reason: your host may have disabled the mail() function.

If you lost your password and could not retrieve it using the lost password link, login to your hosting server.

- Login to phpmyAdmin

- Click Databases

- Select your database

- A list of tables will appear on the left, select the table ‘wp_users’ or equivalent.

- verify the user id under user_login

- edit and change the password to your new password (replacing the md5 hex characters)

- from the drop down next to the password field select ‘md5′

- click the ‘go’ button to implement your changes.

SSH client connection suddenly stopped working.

If your SSH client connection suddenly stopped working on a Linux machine it could be because of change in host_key.

Start with running the ssh command with -v for some verbose output, if thats not clear then remove the host_key entry for your server from $HOME/.ssh/known_hosts on your local machine.

Understanding Cisco firmware versions such as T,M,ED,GD etc

For any network engineer working on Cisco products its a challenge initially to understand how to read Cisco firmware version. We have so many version information out there that it can get confusing even for an experienced engineer.

Below is a quick summary for reference:

Cisco IOS Firmware images would almost always match the following format:

Major.Version(MaintenanceVersion)<minorUpdate><T/E/S/XA/XB><ED/GD/LD/DF/Interim>

example:

IOS – 12.4(15)T4

ASA – 8.1(0)GD

IPS -  7.0(4)E4

where:

Major Version => usually involves drastic change in code compared to previous versions.

MaintenanceVersion => as the name suggests it’s a maintenance release which are usually bug fixes.

Tip to Check if anti-virus software is working.

To test if your anti-virus is working; create a new text file using notepad for example and paste the following line:

X5O!P%@AP[4\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*

Save the file as ‘eicar.com’; your anti-virus should alert you as virus infection if its working as it should.

The file itself is very safe and is just a standard way to test anti-virus. EICAR stands for ‘European Institute for Computer Anti-virus research’. If your anti-virus software did not alert you then it should at least prevent you from running the file.

For details ref. www.eicar.org

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