procenv: 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 CentOS possible default full paths are:

/usr/bin/procenv - from package: procenv

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

On Debian possible default full paths are:

/usr/bin/procenv - from package: procenv

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