tlsa: 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/tlsa - from package: hash-slinger

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

On Debian possible default full paths are:

/usr/bin/tlsa - from package: hash-slinger

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

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