fastq-load: 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/fastq-load - from package: sra-toolkit

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

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