akregator: 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/akregator - from package: kdepim

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

On Debian possible default full paths are:

/usr/bin/akregator - from package: akregator

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

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