mesonconf: 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/mesonconf - from package: meson

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

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