cqa-diff-usertags: 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/cqa-diff-usertags - from package: collab-qa-tools

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

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