aalib-config: 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/aalib-config - from package: aalib-devel

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

On Debian possible default full paths are:

/usr/bin/aalib-config - from package: libaa1-dev

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

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