fig2ps2tex: 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/fig2ps2tex - from package: transfig

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

On Debian possible default full paths are:

/usr/bin/fig2ps2tex - from package: transfig

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

Error in other languages:
fig2ps2tex: bevel nie gevind nie
fig2ps2tex: comandă negăsită
fig2ps2tex: comando não encontrado
fig2ps2tex: commande introuvable
fig2ps2tex: command not found
fig2ps2tex: käsku ei ole
fig2ps2tex: không tìm thấy lệnh
fig2ps2tex: komanda nerasta
fig2ps2tex: Kommando nicht gefunden.
fig2ps2tex: kommandot finns inte
fig2ps2tex: komut yok
fig2ps2tex: nie znaleziono polecenia
fig2ps2tex: níor aimsíodh an t-ordú
fig2ps2tex: no se encontró la orden
fig2ps2tex: no s'ha trobat l'ordre
fig2ps2tex: opdracht niet gevonden
fig2ps2tex: parancs nem található
fig2ps2tex: perintah tidak ditemukan
fig2ps2tex: príkaz nenájdený
fig2ps2tex: příkaz nenalezen
fig2ps2tex: команда не найдена
fig2ps2tex: командата не е открита
fig2ps2tex: 命令找不到
fig2ps2tex: コマンドが見つかりません