pbzcat: 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/pbzcat - from package: pbzip2

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

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