jmap: 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/lib/debug/usr/lib/jvm/java-7-openjdk-amd64/bin/jmap - from package: openjdk-7-dbg
/usr/lib/jvm/java-7-openjdk-amd64/bin/jmap - from package: openjdk-7-jdk

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

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