make_combined_log2: 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/make_combined_log2 - from package: libapache2-mod-log-sql

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

Error in other languages:
make_combined_log2: bevel nie gevind nie
make_combined_log2: comandă negăsită
make_combined_log2: comando não encontrado
make_combined_log2: commande introuvable
make_combined_log2: command not found
make_combined_log2: käsku ei ole
make_combined_log2: không tìm thấy lệnh
make_combined_log2: komanda nerasta
make_combined_log2: Kommando nicht gefunden.
make_combined_log2: kommandot finns inte
make_combined_log2: komut yok
make_combined_log2: nie znaleziono polecenia
make_combined_log2: níor aimsíodh an t-ordú
make_combined_log2: no se encontró la orden
make_combined_log2: no s'ha trobat l'ordre
make_combined_log2: opdracht niet gevonden
make_combined_log2: parancs nem található
make_combined_log2: perintah tidak ditemukan
make_combined_log2: príkaz nenájdený
make_combined_log2: příkaz nenalezen
make_combined_log2: команда не найдена
make_combined_log2: командата не е открита
make_combined_log2: 命令找不到
make_combined_log2: コマンドが見つかりません