x2gocleansessions: 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/sbin/x2gocleansessions - from package: x2goserver

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

Error in other languages:
x2gocleansessions: bevel nie gevind nie
x2gocleansessions: comandă negăsită
x2gocleansessions: comando não encontrado
x2gocleansessions: commande introuvable
x2gocleansessions: command not found
x2gocleansessions: käsku ei ole
x2gocleansessions: không tìm thấy lệnh
x2gocleansessions: komanda nerasta
x2gocleansessions: Kommando nicht gefunden.
x2gocleansessions: kommandot finns inte
x2gocleansessions: komut yok
x2gocleansessions: nie znaleziono polecenia
x2gocleansessions: níor aimsíodh an t-ordú
x2gocleansessions: no se encontró la orden
x2gocleansessions: no s'ha trobat l'ordre
x2gocleansessions: opdracht niet gevonden
x2gocleansessions: parancs nem található
x2gocleansessions: perintah tidak ditemukan
x2gocleansessions: príkaz nenájdený
x2gocleansessions: příkaz nenalezen
x2gocleansessions: команда не найдена
x2gocleansessions: командата не е открита
x2gocleansessions: 命令找不到
x2gocleansessions: コマンドが見つかりません