aspell-autobuildhash: command not found

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/sbin/aspell-autobuildhash - from package: dictionaries-common

You may install the required package with command apt-get install {package}

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