taskjuggler: 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/taskjuggler - from package: taskjuggler

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

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