gendesc: 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/gendesc - from package: lcov

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

On Debian possible default full paths are:

/usr/bin/gendesc - from package: lcov

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

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