transeq: 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/transeq - from package: emboss

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