c2070: 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/c2070 - from package: c2070

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

Error in other languages:
c2070: bevel nie gevind nie
c2070: comandă negăsită
c2070: comando não encontrado
c2070: commande introuvable
c2070: command not found
c2070: käsku ei ole
c2070: không tìm thấy lệnh
c2070: komanda nerasta
c2070: Kommando nicht gefunden.
c2070: kommandot finns inte
c2070: komut yok
c2070: nie znaleziono polecenia
c2070: níor aimsíodh an t-ordú
c2070: no se encontró la orden
c2070: no s'ha trobat l'ordre
c2070: opdracht niet gevonden
c2070: parancs nem található
c2070: perintah tidak ditemukan
c2070: príkaz nenájdený
c2070: příkaz nenalezen
c2070: команда не найдена
c2070: командата не е открита
c2070: 命令找不到
c2070: コマンドが見つかりません