tint2: 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/tint2 - from package: tint2

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

On Debian possible default full paths are:

/usr/bin/tint2 - from package: tint2

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

Error in other languages:
tint2: bevel nie gevind nie
tint2: comandă negăsită
tint2: comando não encontrado
tint2: commande introuvable
tint2: command not found
tint2: käsku ei ole
tint2: không tìm thấy lệnh
tint2: komanda nerasta
tint2: Kommando nicht gefunden.
tint2: kommandot finns inte
tint2: komut yok
tint2: nie znaleziono polecenia
tint2: níor aimsíodh an t-ordú
tint2: no se encontró la orden
tint2: no s'ha trobat l'ordre
tint2: opdracht niet gevonden
tint2: parancs nem található
tint2: perintah tidak ditemukan
tint2: príkaz nenájdený
tint2: příkaz nenalezen
tint2: команда не найдена
tint2: командата не е открита
tint2: 命令找不到
tint2: コマンドが見つかりません