tuxpaint-import: 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/tuxpaint-import - from package: tuxpaint

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

On Debian possible default full paths are:

/usr/bin/tuxpaint-import - from package: tuxpaint

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

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