pee: 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/pee - from package: moreutils

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

On Debian possible default full paths are:

/usr/bin/pee - from package: moreutils

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

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