hhsearch: 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/hhsearch - from package: hhsuite

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

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