testdb.pl: 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/share/gmod/chado/bin/testdb.pl - from package: libchado-perl

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