fribidi: 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/fribidi - from package: fribidi

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

On Debian possible default full paths are:

/usr/bin/fribidi - from package: libfribidi-bin

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

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