rigswr: 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 CentOS possible default full paths are:

/usr/bin/rigswr - from package: hamlib

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/rigswr - from package: libhamlib-utils

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

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