runzip: 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/runzip - from package: rzip

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

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