pfb2pfa: 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/pfb2pfa - from package: texlive

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

On Debian possible default full paths are:

/usr/bin/pfb2pfa - from package: texlive-binaries

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

Error in other languages:
pfb2pfa: bevel nie gevind nie
pfb2pfa: comandă negăsită
pfb2pfa: comando não encontrado
pfb2pfa: commande introuvable
pfb2pfa: command not found
pfb2pfa: käsku ei ole
pfb2pfa: không tìm thấy lệnh
pfb2pfa: komanda nerasta
pfb2pfa: Kommando nicht gefunden.
pfb2pfa: kommandot finns inte
pfb2pfa: komut yok
pfb2pfa: nie znaleziono polecenia
pfb2pfa: níor aimsíodh an t-ordú
pfb2pfa: no se encontró la orden
pfb2pfa: no s'ha trobat l'ordre
pfb2pfa: opdracht niet gevonden
pfb2pfa: parancs nem található
pfb2pfa: perintah tidak ditemukan
pfb2pfa: príkaz nenájdený
pfb2pfa: příkaz nenalezen
pfb2pfa: команда не найдена
pfb2pfa: командата не е открита
pfb2pfa: 命令找不到
pfb2pfa: コマンドが見つかりません