gsf: 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/gsf - from package: libgsf-devel

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

On Debian possible default full paths are:

/usr/bin/gsf - from package: libgsf-bin

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

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