qelectrotech: 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/qelectrotech - from package: qelectrotech

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

On Debian possible default full paths are:

/usr/bin/qelectrotech - from package: qelectrotech

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

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