lincredits: command not found

Have You tried accessing the binary with the full path?

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/lincredits - from package: lincredits

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