swift-im: 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/swift-im - from package: swift

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

On Debian possible default full paths are:

/usr/bin/swift-im - from package: swift-im

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

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