ctdb_bench: 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/lib/ctdb/tests/bin/ctdb_bench - from package: ctdb-dbg

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

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