ecryptfs-stat: 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 CentOS possible default full paths are:

/usr/bin/ecryptfs-stat - from package: ecryptfs-utils

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

On Debian possible default full paths are:

/usr/bin/ecryptfs-stat - from package: ecryptfs-utils

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