seqsearch: 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/seqsearch - from package: embassy-domsearch

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

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