tsserve: 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/bin/tsserve - from package: tstools

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

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