qstardict: 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/qstardict - from package: qstardict

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

On Debian possible default full paths are:

/usr/bin/qstardict - from package: qstardict

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

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