semanage: 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/sbin/semanage - from package: policycoreutils-python

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

On Debian possible default full paths are:

/usr/sbin/semanage - from package: policycoreutils

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

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