ssh-conv: 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/ssh-conv - from package: lsh-utils

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

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