fetchyahoo: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/fetchyahoo - from package: fetchyahoo

You may install the required package with command apt-get install {package}
Error in other languages:
fetchyahoo: bevel nie gevind nie
fetchyahoo: comandă negăsită
fetchyahoo: comando não encontrado
fetchyahoo: commande introuvable
fetchyahoo: command not found
fetchyahoo: käsku ei ole
fetchyahoo: không tìm thấy lệnh
fetchyahoo: komanda nerasta
fetchyahoo: Kommando nicht gefunden.
fetchyahoo: kommandot finns inte
fetchyahoo: komut yok
fetchyahoo: nie znaleziono polecenia
fetchyahoo: níor aimsíodh an t-ordú
fetchyahoo: no se encontró la orden
fetchyahoo: no s'ha trobat l'ordre
fetchyahoo: opdracht niet gevonden
fetchyahoo: parancs nem található
fetchyahoo: perintah tidak ditemukan
fetchyahoo: príkaz nenájdený
fetchyahoo: příkaz nenalezen
fetchyahoo: команда не найдена
fetchyahoo: командата не е открита
fetchyahoo: 命令找不到
fetchyahoo: コマンドが見つかりません