hmmpress: 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/hmmpress - from package: hmmer

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

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