cvm-benchclient: command not found

Have You tried accessing the binary with the full path?

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/cvm-benchclient - from package: cvm

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