lssu: 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/lssu - from package: nilfs-tools

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

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