removable_storage_test: 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/plainbox-providers-1/checkbox/bin/removable_storage_test - from package: plainbox-provider-checkbox

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

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