tfmtodit: 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/tfmtodit - from package: groff

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

On Debian possible default full paths are:

/usr/bin/tfmtodit - from package: groff

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

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