pam_abl: 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 Debian possible default full paths are:

/usr/bin/pam_abl - from package: libpam-abl

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

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