vesync: command not found

Have You tried accessing the binary with the full path?

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 Debian possible default full paths are:

/usr/sbin/vesync - from package: util-vserver

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