repomanage: 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/repomanage - from package: yum-utils

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

On Debian possible default full paths are:

/usr/bin/repomanage - from package: yum-utils

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

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