clpbar: 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/clpbar - from package: clpbar

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

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