tkinspect: 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

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/tkinspect - from package: tkinspect

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