clementine-tagreader: 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/clementine-tagreader - from package: clementine

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

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