specto: 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/specto - from package: specto

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