fc-cat: 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/fc-cat - from package: fontconfig

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

On Debian possible default full paths are:

/usr/bin/fc-cat - from package: fontconfig

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

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