vi or vim . For more help execute : man vi or man vim
If you want to understand/learn how Asterisk works and to have more control on what exactly is written in the configuration files, use the above programs.
Oh~no, I means if Are there some web config tools for Asterisk ?
I cherched on Google.
A lot of stuff seems to exist.
voip-info.org/tiki-index.php … terisk+GUI