pbget: 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 Debian possible default full paths are:

/usr/bin/pbget - from package: pastebinit

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