uncompface: 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/uncompface - from package: compface

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

On Debian possible default full paths are:

/usr/bin/uncompface - from package: compface

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

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