lshd: 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/sbin/lshd - from package: lsh-server

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

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