vanessa_socket_pipe: 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/vanessa_socket_pipe - from package: vanessa_socket-pipe

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

On Debian possible default full paths are:

/usr/bin/vanessa_socket_pipe - from package: libvanessa-socket-pipe

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

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