mozplugger-linker: command not found

Have You tried accessing the binary with the full path?

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/mozplugger-linker - from package: mozplugger

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