fusermount: 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:

/bin/fusermount - from package: fuse
/usr/bin/fusermount - from package: fuse

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

On Debian possible default full paths are:

/bin/fusermount - from package: fuse

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

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