connect-tool: 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/connect-tool - from package: xsupplicant

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

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