ca.pl: 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/share/ledgersmb/bin/ca.pl - from package: ledgersmb
/usr/share/sql-ledger/bin/lynx/ca.pl - from package: sql-ledger
/usr/share/sql-ledger/bin/mozilla/ca.pl - from package: sql-ledger

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

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