dislocker-fuse: 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/dislocker-fuse - from package: fuse-dislocker

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

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