storeBackupSearch: 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

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/storeBackupSearch - from package: storebackup
/usr/share/storebackup/bin/storeBackupSearch - from package: storebackup

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