hhblits: 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/bin/hhblits - from package: hhsuite

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

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