lp-list-bugs: 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/lp-list-bugs - from package: lptools

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

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