lshg: 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/lshg - from package: lsh-client

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

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