fetch-eclipse-source: 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/bin/fetch-eclipse-source - from package: javahelper

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

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