fig2pdf: 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/fig2pdf - from package: fig2ps

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

On Debian possible default full paths are:

/usr/bin/fig2pdf - from package: fig2ps

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

Error in other languages:
fig2pdf: bevel nie gevind nie
fig2pdf: comandă negăsită
fig2pdf: comando não encontrado
fig2pdf: commande introuvable
fig2pdf: command not found
fig2pdf: käsku ei ole
fig2pdf: không tìm thấy lệnh
fig2pdf: komanda nerasta
fig2pdf: Kommando nicht gefunden.
fig2pdf: kommandot finns inte
fig2pdf: komut yok
fig2pdf: nie znaleziono polecenia
fig2pdf: níor aimsíodh an t-ordú
fig2pdf: no se encontró la orden
fig2pdf: no s'ha trobat l'ordre
fig2pdf: opdracht niet gevonden
fig2pdf: parancs nem található
fig2pdf: perintah tidak ditemukan
fig2pdf: príkaz nenájdený
fig2pdf: příkaz nenalezen
fig2pdf: команда не найдена
fig2pdf: командата не е открита
fig2pdf: 命令找不到
fig2pdf: コマンドが見つかりません