ncbi-seg: command not found

Have You tried accessing the binary with the full path?

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 Debian possible default full paths are:

/usr/bin/ncbi-seg - from package: ncbi-seg

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