notseq: 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 Debian possible default full paths are:

/usr/bin/notseq - from package: emboss

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

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