Write (save) your configuration before you logout!

I did have some costly lessen of forgetting to write (save, actually!) the configuration of a IOS router. Recently a post of Brad Reese tells that I am not alone!

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Top 25 network problems and their business impact

1. Configuration not saved

Reboot will cause config to be lost
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Saving the configuration is easy by simply typing wr followed by <enter>, which is a short version for the write command.

The conclusion: always check and save, before you logout!