babeltrace-log: 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 CentOS possible default full paths are:

/usr/bin/babeltrace-log - from package: babeltrace

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/babeltrace-log - from package: babeltrace

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

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