psfxtable: 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/psfxtable - from package: kbd

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

On Debian possible default full paths are:

/usr/bin/psfxtable - from package: kbd

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

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