litl_merge: 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/litl_merge - from package: litl-tools

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

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