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 Debian possible default full paths are:

/usr/bin/inspect - from package: libboost1.55-tools-dev

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

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