pllist: 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/pllist - from package: gnustep-base

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

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