blame: 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/blame - from package: rcs-blame

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

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