test-inspect: 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/test-inspect - from package: sparse

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

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