ocamlplugininfo: 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/ocamlplugininfo - from package: ocaml

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

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