jumpapplet: 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/jumpapplet - from package: autojump

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

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