ncarlogo2ps: 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/ncarlogo2ps - from package: ncl

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

On Debian possible default full paths are:

/usr/bin/ncarlogo2ps - from package: ncl-ncarg

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

Error in other languages:
ncarlogo2ps: bevel nie gevind nie
ncarlogo2ps: comandă negăsită
ncarlogo2ps: comando não encontrado
ncarlogo2ps: commande introuvable
ncarlogo2ps: command not found
ncarlogo2ps: käsku ei ole
ncarlogo2ps: không tìm thấy lệnh
ncarlogo2ps: komanda nerasta
ncarlogo2ps: Kommando nicht gefunden.
ncarlogo2ps: kommandot finns inte
ncarlogo2ps: komut yok
ncarlogo2ps: nie znaleziono polecenia
ncarlogo2ps: níor aimsíodh an t-ordú
ncarlogo2ps: no se encontró la orden
ncarlogo2ps: no s'ha trobat l'ordre
ncarlogo2ps: opdracht niet gevonden
ncarlogo2ps: parancs nem található
ncarlogo2ps: perintah tidak ditemukan
ncarlogo2ps: príkaz nenájdený
ncarlogo2ps: příkaz nenalezen
ncarlogo2ps: команда не найдена
ncarlogo2ps: командата не е открита
ncarlogo2ps: 命令找不到
ncarlogo2ps: コマンドが見つかりません