qgit: 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/qgit - from package: qgit

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

On Debian possible default full paths are:

/usr/bin/qgit - from package: qgit

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

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