srf2fastq: 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/srf2fastq - from package: staden-io-lib-utils

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

Error in other languages:
srf2fastq: bevel nie gevind nie
srf2fastq: comandă negăsită
srf2fastq: comando não encontrado
srf2fastq: commande introuvable
srf2fastq: command not found
srf2fastq: käsku ei ole
srf2fastq: không tìm thấy lệnh
srf2fastq: komanda nerasta
srf2fastq: Kommando nicht gefunden.
srf2fastq: kommandot finns inte
srf2fastq: komut yok
srf2fastq: nie znaleziono polecenia
srf2fastq: níor aimsíodh an t-ordú
srf2fastq: no se encontró la orden
srf2fastq: no s'ha trobat l'ordre
srf2fastq: opdracht niet gevonden
srf2fastq: parancs nem található
srf2fastq: perintah tidak ditemukan
srf2fastq: príkaz nenájdený
srf2fastq: příkaz nenalezen
srf2fastq: команда не найдена
srf2fastq: командата не е открита
srf2fastq: 命令找不到
srf2fastq: コマンドが見つかりません